The Penstemons

Seed Germination Methodology

Jim Swayne <jas3255@yahoo.com>

|This page covers specific epithets K through Z and synonyms.|   |Jump to A through J |

Skip to | M | N | O | P | R | S  | T | U to Z | Synonyms |

P. kingii , Saccanthera , ( 6 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 10x10 ), herbaceous , violet, purple , dryland
P. kunthii , Campanulati , ( 6-9 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 22x12 ), herbaceous , red , mixed
P. labrosus , Elmigera , ( 6 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 18x7 ), herbaceous , scarlet , open wooded
P. laetus , Saccanthera , ( 6 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 30x12 ), subshrub , pink, violet, purple , open wooded
P. laevigatus , Penstemon , ( 6 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 30x? ), herbaceous , white , open wooded
P. laevis , Habroanthus , ( 4 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 16x? ), herbaceous , blue , dryland
P. lanceolatus , Dentanthera , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 22x? ), herbaceous , scarlet , open wooded
P. laricifolius ssp. exilifolius , Ericopsis , ( 3 ), Surface sow 8 wks @ 40ºF (4ºC), needs light for germ. , ( 4x3 ), herbaceous , white , plains
P. laricifolius ssp. laricifolius , Ericopsis , ( 3 ), Surface sow 8 wks @ 40ºF (4ºC), needs light for germ. , ( 4x3 ), herbaceous , lavender, pink , plains
P. laxiflorus , segregated from P. campanulatus by Straw , ( ? ), No germ. methodology data. , ( ), , ,
P. laxus , Proceri , ( 6 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 24x? ), herbaceous , blue , dryland
P. leiophyllus , Habroanthus , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 12x? ), herbaceous , purple, violet , dry upland
P. lemhiensis , Habroanthus , ( 6 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 30x6 ), herbaceous , blue , open wooded
P. lentus v. albiflorus , Anualarius , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 20x? ), herbaceous , white , dryland
P. lentus v. lentus , Anualarius , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 20x? ), herbaceous , blue , dryland
P. leonardii , Saccanthera , ( 6 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 16x16 ), subshrub , blue , dryland
P. leonensis , Fasciculi , ( 7 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 20x? ), herbaceous , purple , open wooded
P. leptanthus , Habroanthus , ( ? ), No germ. methodology data. , ( ), , ,
P. linarioides , Ericopsis , ( 5 ), Sow under thin cover 8 wks @ 40ºF (4ºC) , ( 5x6 ), mat , blue, varies , alpine , yes
P. longiflorus , Habroanthus , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 24x? ), herbaceous , blue , dry upland
P. lyalllii , Dasanthera , ( 5 ), Sow barely covered 8 wks @ 40ºF (4ºC), germinates at 40ºF under light. , ( 30x? ), shrubby , lavender , alpine
P. marcusii , Aurator , ( 6 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 9x? ), herbaceous , blue, purple , desert
P. mensarum , Habroanthus , ( 4 ), Surface sow 8 wks @ 40ºF (4ºC), needs light for germ. , ( 30x8 ), herbaceous , blue , alpine , yes
P. miniatus , Fasciculi , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), germinates at 40ºF under light. , ( 48x? ), herbaceous , red , alpine
P. miser , Aurator , ( 5 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 16x? ), herbaceous , blue, lavender, purple , dryland
P. moffattii , Aurator , ( 4 ), Surface sow 8 wks @ 40ºF (4ºC), needs light for germ. , ( 12x4 ), herbaceous , blue , dryland
P. mohrinoranus , Fasciculi , ( 7 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 40x? ), herbaceous , red , open wooded
P. monoensis , Aurator , ( 6 ), Surface sow 8 wks @ 40ºF (4ºC), needs light for germ. , ( 12x10 ), herbaceous , rose , dryland
P. montanus v. idahoensis , Dasanthera , ( 3 ), Surface sow 12 wks @ 40ºF (4ºC), needs light for germ. , ( 6x10 ), shrub , blue, lavender, violet , alpine
P. montanus v. montanus , Dasanthera , ( 3 ), Surface sow 8 wks @ 40ºF (4ºC), needs light for germ., move to 70ºF (21ºC) for germ. , ( 7x6 ), shrub , blue, lavender, violet , alpine
P. moriahensis , Habroanthus , ( 6 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 20x? ), herbaceous , blue , open wooded
P. moronensis , , ( ? ), No germ. methodology data. , ( ), , ,
P. multiflorus , Multiflori , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 24x ), herbaceous , white , open wooded
P. murrayanus , Havardiana , ( 8 ), Sow under thin cover 8 wks @ 40ºF (4ºC), move to 70ºF (21ºC) for germ. , ( 36x8 ), herbaceous , red , open wooded
P. nanus , Aurator , ( 5 ), Surface sow 12 wks @ 40ºF (4ºC), needs light for germ. , ( 1x2 ), herbaceous , violet , dryland
P. navajoa , Habroanthus , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 18x? ), herbaceous , blue , open wooded
P. neomexicanus , Habroanthus , ( 5 ), Sow under thin cover 8 wks @ 40ºF (4ºC) , ( 35x10 ), herbaceous , purple , open wooded
P. neotericus , Saccanthera , ( ? ), Sow under thin cover 8 wks @ 40ºF (4ºC) , ( 24x? ), subshrub , blue , open wooded , yes
P. newberryi ssp. berryi , Dasanthera , ( 5 ), Surface sow 12 wks @ 40ºF (4ºC), needs light for germ. , ( 12x20 ), shrub , lavender, purple, pink , alpine
P. newberryi , Dasanthera , ( 5 ), Surface sow 12 wks @ 40ºF (4ºC), needs light for germ. , ( 8x20 ), shrub , red , alpine
P. nitidus , Anularius , ( 4 ), Surface sow 8 wks @ 40ºF (4ºC), needs light for germ. , ( 16x9 ), herbaceous , blue , plains , yes
P. nitidus v. nitidus , Anularius , ( 3 ), Surface sow 8 wks @ 40ºF (4ºC), needs light for germ., move to 70ºF (21ºC) for germ. , ( 16x9 ), herbaceous , blue , plains
P. nudiflorus , Habroanthus , ( 6 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 40x6 ), herbaceous , lavender , dryland
P. occiduus , Fasciculi , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), germinates at 40ºF under light. , ( 24x? ), herbaceous , violet , alpine
P. oklahomensis , Penstemon , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 24x? ), herbaceous , white , mixed
P. oliganthus , Penstemon , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 14x6 ), herbaceous , blue , open wooded
P. ophianthus , Aurator , ( 6 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 4x3 ), herbaceous , lavender , plains
P. osterhoutii , Anularius , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 32x? ), herbaceous , purple , dryland
P. ovatus , Humiles , ( 6 ), Surface sow 8 wks @ 40ºF (4ºC), needs light for germ. , ( 40x? ), herbaceous , blue, violet , dryland
P. pachyphyllus , Anularius , ( 4 ), Surface sow 8 wks @ 40ºF (4ºC), needs light for germ. , ( 14x6 ), herbaceous , blue , dryland
P. pachyphyllus v. pachyphyllus , Anularius , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 14x6 ), herbaceous , blue , open wooded
P. pahutensis , Habroanthus , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 14x? ), herbaceous , lavender , open wooded
P. pallidus , Penstemon , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 36x? ), herbaceous , white , mixed
P. palmeri , Peltanthera , ( 4-9 ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 8 wks @ 40ºF (4ºC) , ( 34x24 ), herbaceous , white, pink , dryland
P. papillatus , Saccanthera , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 16x? ), herbaceous , violet , open wooded
P. parryi , Centranthifolii , ( 6 ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 48x? ), herbaceous , rose , desert
P. parviflorus , Aurator , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 12x? ), herbaceous , purple , dryland
P. parvulus , Saccanthera , ( ? ), Sow under thin cover 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) for germ. , ( 14x12 ), subshrub , blue, violet , open wooded , yes
P. parvus , Habroanthus , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 7x3 ), herbaceous , blue , dryland
P. patens , Centranthifolii , ( 6 ), Scarify seed, Surface sow 8 wks @ 40ºF (4ºC), needs light for germ. , ( 24x? ), subshrub , purple , dry upland
P. payetttensis , Habroanthus , ( 5 ), Surface sow 12 wks @ 40ºF (4ºC), needs light for germ. , ( 28x10 ), herbaceous , blue, violet , dryland
P. paysoniorum , Habroanthus , ( 3 ), Surface sow 12 wks @ 40ºF (4ºC), needs light for germ. , ( 6x5 ), herbaceous , violet , dryland
P. peckii , Proceri , ( 5 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 48x12 ), mat , blue, pink , open wooded
P. penlandii , Habroanthus , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 10x? ), herbaceous , violet , dryland
P. pennellianus , Habroanthus , ( 5 ), Surface sow 12 wks @ 40ºF (4ºC), needs light for germ., move to 50 for germ. , ( 24x12 ), herbaceous , blue , dry upland , yes
P. perfoliatus , Perfoliati , ( 6 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 27x12 ), herbaceous , purple, blue , high forest
P. perpulcher , Habroanthus , ( 6 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 36x8 ), herbaceous , blue, violet , dryland
P. personatus , Cryptostemon , ( 8 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow on surface 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 22x? ), herbaceous , purple , dryland
P. petiolatus , Petiolati , ( 7 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow on surface 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 4x8 ), herbaceous , violet , dryland
P. pinifolius , Fasciculi , ( 3-9 ), Sow under thin cover 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) for germ. , ( 18x12 ), herbaceous , red , dry upland
P. pinifolius "Compactum" , Fasciculi , ( 3-9 ), Sow under thin cover 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) for germ. , ( 8x8 ), herbaceous , red , dry upland
P. pinifolius "Mersea Yellow" , Fasciculi , ( 3-9 ), Sow under thin cover 8 wks @ 40ºF (4ºC) , ( 12x12 ), herbaceous , yellow , dry upland
P. pinorum , Aurator , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 8x? ), herbaceous , blue, lavender , dryland
P. plagapineus , Fasciculi , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 40x? ), subshrub , red , high forest
P. platyphyllus , Saccanthera , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 24x8 ), subshrub , lavender , dry upland
P. potosinus , Campanulati , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 38x? ), subshrub , purple , open forest
P. pratensis , Proceri , ( 5 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 20x8 ), herbaceous , cream , moist upland
P. procerus , Proceri , ( 2 ), Sow under thin cover 8 wks @ 40ºF (4ºC) , ( 6x12 ), mat , blue, varies , alpine
P. pruinosus , Humiles , ( 6 ), Sow under thin cover 8 wks @ 40ºF (4ºC) , ( 16x6 ), herbaceous , blue, lavender , dryland , yes
P. pseudoparvus , Humiles , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), germinates at 40ºF under light. , ( 12x? ), herbaceous , purple , alpine
P. pseudoputus , Habroanthus , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 16x? ), herbaceous , mauve , dryland
P. pseudospectabilis ssp. connatifolius , Peltanthera , ( 5-10 ), Sow under thin cover 8 wks @ 40ºF (4ºC) , ( 20x12 ), herbaceous , red, pink , desert
P. pseudospectabilis , Peltanthera , ( 5-10 ), Surface sow 8 wks @ 40ºF (4ºC), needs light for germ. , ( 20x12 ), herbaceous , red, pink , desert
P. pudicus , Saccanthera , ( ? ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) , ( 18x? ), subshrub , blue , high forest
P. pumilus , Aurator , ( 5 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 6x6 ), prostrate , blue, purple , dryland
P. punctatus , Aurator , ( ? ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( ? ), ? , violet , plains
P. purpusii , Saccanthera , ( 6 ), Sow barely covered 8 wks @ 40ºF (4ºC), germinates at 40ºF under light. , ( 8x? ), shrub , violet , alpine
P. putus , , ( ? ), No germ. methodology data. , ( ), , ,
P. radicosus , Humiles , ( 5 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. , ( 16x6 ), herbaceous , blue, purple , dryland
P. ramaleyI , Caespitosi ,( ), Sow under thin cover 8 wks @ 40ºF (4ºC) ,( 12x ), subshrub , Blue , alpine ,
P. ramosus , Dentanthera ,( ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 6 wks @ 40ºF (4ºC) ,( 22x ), herbaceous , O,R,V , dryland ,
P. rattanii ssp. kleei , Humiles ,( ), Sow under thin cover 12 wks @ 40ºF (4ºC) ,( 48x ), herbaceous , Lavender, Violet , open wooded ,
P. rattanii ssp. rattanii , Humiles ,( ), Sow under thin cover 12 wks @ 40ºF (4ºC), move to 50ºF (10ºC) for germ.,( 48x ), herbaceous , Lavender, Violet , open wooded , yes
P. retrorsus , Caespitosi ,( 5 ), Surface sow 12 wks @ 40ºF (4ºC), needs light for germ.,( 3x8 ), mat , Violet , dry upland ,
P. richardsonii v. curtiflorus , Serrulati ,( 4 ), Surface sow 6 wks @ 40ºF for germ. in light ,( 24x24 ), subshrub , Lavender , dryland ,
P. richardsonii v. dentatus , Serrulati ,( 4 ), Surface sow 6 wks @ 40ºF for germ. in light ,( 24x24 ), subshrub , ,dryland,
P. richardsonii v. richardsonii , Serrulati ,( 4 ), Surface sow 6 wks @ 40ºF for germ. in light ,( 24x24 ), subshrub , Lavender , dryland ,
P. roezlii , Saccanthera ,( 5 ), Sow under thin cover 8 wks @ 40ºF (4ºC) ,( 20x8 ), herbaceous , Blue, Violet , alpine ,
P. rostriflorus , Emersus ,( 6 ), Surface sow 8 wks @ 40ºF for germ. in light ,( 24x24 ), subshrub , scarlet , dryland ,
P. rotundifolius , Havardiani ,( ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 6 wks @ 40ºF (4ºC) ,( 12x ), subshrub , scarlet , dryland ,
P. rubicundus , Peltanthera ,( ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 6 wks @ 40ºF (4ºC) ,( 48x ), herbaceous , rose , dryland ,
P. rupicola , Dasanthera ,( 4 ), Surface sow 8 wks @ 40ºF (4ºC), move to 70ºF (21ºC) for germ. under light. ,( 12x12 ), mat , Red , alpine ,
P. rydbergii ssp. aggregatus , Proceri ,( 2 ), Sow under thin cover 8 wks @ 40ºF (4ºC),( 24x ), herbaceous , Blue , moist upland ,
P. rydbergii v. oreocharis , Proceri ,( 2 ), Sow under thin cover 8 wks @ 40ºF (4ºC),( 24x ), herbaceous , Blue , moist upland ,
P. rydbergii v. rydbergii , Proceri ,( 2 ), Sow under thin cover 8 wks @ 40ºF (4ºC),( 24x ), herbaceous , Blue , moist upland ,
P. saltarius , Fasciculus ,( ),Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) ,( 14x ), herbaceous , Violet , open wooded ,
P. 'Saskatoon Hybrid' , ,( 3 ), Sow under thin cover 8 wks @ 40ºF (4ºC) ,( 40x16 ), herbaceous , Red , na ,
P. saxosorum , Habroanthus ,( ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. ,( 30x ), herbaceous , Blue , dry upland ,
P. scapoides , Saccanthera ,( 5 ), Surface sow 8 wks @ 40ºF for germ. in light,( 16x ), subshrub , lilac , dryland ,
P. scariosus v. albifluvis , Habroanthus ,( ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. ,( 20x ), herbaceous , Blue , mixed dry
P. scariosus v. cyanomontanus , Habroanthus ,( ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. ,( 20x ), herbaceous , Blue , mixed dry ,
P. scariosus v. garrettii , Habroanthus ,( ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. ,( 20x ), herbaceous , Blue , mixed dry
P. scariosus v. scariosus , Habroanthus ,( ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. ,( 20x ), herbaceous , Blue , mixed dry
P. schaffneri , Campanulati ,( ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. ,( 27x ), shrub , Red , mixed dry ,
P. secundiflorus , Anularius ,( 4 ), Surface sow 6 wks @ 40ºF, move to 70ºF (21ºC) for germ. in light.,( 20x10 ), herbaceous , Pink, Violet, Lavender , mixed ,
P. seorus , Gairdneriani ,( 5 ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 6 wks @ 40ºF (4ºC) ,( 16x6 ), mat , Blue, Pink, Lavender , dryland ,
P. sepalulus , Saccanthera ,( ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) ,( 30x ), subshrub , Lavender , scree
P. serrulatus , Serrulati ,( 5 ), Sow under thin cover @ 40ºF (4ºC),( 16x6 ), subshrub , Blue, Purple , moist ground ,
P. smallii , Penstemon ,( 6 ), Sow under thin cover 3 wks @ 40ºF (4ºC) ,( 24x ), herbaceous , Purple , lowland ,
P. spatulatus , Proceri ,( 5 ), Sow under thin cover 8 wks @ 40ºF (4ºC) ,( 10x10 ), mat , Blue, Violet , alpine ,
P. speciosus , Habroanthus ,( 5 ), Sow under thin cover 8 wks @ 40ºF (4ºC) ,( 36x8 ), herbaceous , Blue, Violet, Purple , dryland ,
P. speciosus "Kennedyi" , Habroanthus ,( 5 ), Sow under thin cover 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) for germ.,( 36x ), herbaceous , Blue , dryland , yes
P. spectabilis ssp. subviscosus , Peltanthera ,( 6 ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) ,( 60x24 ), herbaceous , Blue, Pink , desert ,
P. spectabilis v. gilmanii , Peltanthera ,( 6 ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) ,( 60x24 ), herbaceous , Blue, Pink , desert ,
P. spectabilis v. spectabillis , Peltanthera ,( 6 ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) ,( 30x20 ), herbaceous , Blue, Pink , desert ,
P. stenophyllus , Dentanthera ,( ), Sow under thin cover 8 wks @ 40ºF (4ºC), germ. at 40ºF (4ºC) ,( 20x6 ), herbaceous , Violet , dryland , yes
P. stephensii , Peltanthera ,( ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) ,( 36x ), herbaceous , Red , desert ,
P. strictiformis , Habroanthus ,( ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) ,( 24x ), herbaceous , Blue , open wooded ,
P. strictus , Habroanthus ,( 4-9 ), Surface sow 12 wks @ 40ºF (4ºC), needs light for germ. ,( 24x18 ), mat , Blue, Purple , dry upland ,
P. subglaber , Habroanthus ,( 5 ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) ,( 28x5 ), herbaceous , Blue , mixed ,
P. subserratus , Humiles ,( 5 ),Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) ,( 30x ), herbaceous , Blue , open wooded ,
P. subulatus , Centranthifolii ,( 6 ), Sow under thin cover 12 wks @ 40ºF (4ºC), germ. at 40ºF (4ºC) ,( 28x8 ), herbaceous , Scarlet , dryland , yes
P. sudans , Deusti ,( 6 ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light.,( 28x ), herbaceous , Cream , dry upland ,
P. superbus , Centranthifolii ,( 6 ), Sow under thin cover @ 40ºF (4ºC) ,( 48x ), herbaceous , Scarlet , mixed dry ,
P. tenuiflorus , Penstemon ,( ), Sow under thin cover 3 wks @ 40ºF (4ºC) ,( 24x ), herbaceous , White , lowland ,
P. tenuifolius , Fasciculus ,( ), Sow under thin cover 8 wks @ 40ºF (4ºC) ,( 14x ), shrub , Lavender , alpine ,
P. tenuis , Penstemon ,( ), Sow under thin cover 3 wks @ 40ºF (4ºC) ,( 24x ), herbaceous , Purple , lowland ,
P. tepicensus , Campanulati ,( ), Sow under thin cover 8 wks @ 40ºF (4ºC) ,( 16x ), herbaceous , Lavender , alpine ,
P. teucrioides , Caespitosi ,( 3 ), Surface sow 8 wks @ 40ºF, move to 70ºF (21ºC) for germ. in light ,( 3x24 ), mat , Blue , dryland ,
P. thompsoniae ssp. jaegeri , Caespitosi ,( 4 ), Surface sow 8 wks @ 40ºF (4ºC), move to 70ºF (21ºC) for germ. in light. ,( 2x8 ), shrub , Violet , dry wooded ,
P. thompsoniae ssp. thompsoniae , Caespitosi ,( 4 ), Surface sow 8 wks @ 40ºF (4ºC), move to 70ºF (21ºC) for germ. in light.,( 2x8 ), shrub , Violet , dry wooded ,
P. thurberii , Ambigui ,( 6 ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 6 wks @ 40ºF (4ºC) ,( 24x12 ), shrub , Lavender , dryland ,
P. tidestromii , Habroanthus ,( ), Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) ,( 24x ), herbaceous , Blue , open wooded ,
P. tiehmii , Mexican species from Zacetecas ,( ),Sow under thin cover 8 wks @ 40ºF (4ºC),( ), , , ,
P. tracyi , Deusti ,( ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light.,( 5x ), herbaceous , Pink , dry upland ,
P. triflorus ssp. integrifolius , Aurator ,( ), Sow under thin cover 8 wks @ 40ºF (4ºC),( 24x ), herbaceous , Lavender , plains ,
P. triflorus ssp. triflorus , Aurator ,( ), Sow under thin cover 8 wks @ 40ºF (4ºC) ,( 24x ), herbaceous , Violet , plains ,
P. triphyllus , Serrulati ,( 6 ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 6 wks @ 40ºF (4ºC) ,( 30x30 ), subshrub , Lilac , dryland ,
P. tubaeflorus v. achoreus , Tubaeflori ,( ), Sow under thin cover 8 wks @ 40ºF (4ºC),( 36x ), herbaceous , White , alluvial ,
P. tubaeflorus v. tubaeflorus , Tubaeflori ,( ), Sow under thin cover 8 wks @ 40ºF (4ºC) ,( 36x ), herbaceous , White , alluvial ,
P. tusharensis , Saccanthera ,( ), Sow under thin cover 8 wks @ 40ºF (4ºC),( ), , , ,
P. unilateralis , Habroanthus ,( 5 ), Sow under thin cover 8 wks @ 40ºF (4ºC) ,( 24x5 ), herbaceous , Blue, Lavender, Purple , dry upland ,
P. unitahensis , Habroanthus ,( ), Store seed @ 70ºF (21ºC) in a non-humid environment for 6 mo. Sow barely covered 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. under light. ,( 6x ), herbaceous , Blue , dry upland ,
P. utahensis , Centranthifolii ,( 4 ), Surface sow 8 wks @ 40ºF for germ. in light, 40 ,( 1x6 ), herbaceous , Blue , dryland , yes
P. venustus , Serrulati ,( 5 ), Surface sow 8 wks @ 40ºF (4ºC), move to 60ºF (16ºC) for germ. in light,( 20x20 ), subshrub , Lavender, Purple, Violet , alpine ,
P. versicolor , ,( ),Sow under thin cover 8 wks @ 40ºF (4ºC) ,( ), , , ,
P. virens , Humiles ,( 4-8 ), Surface sow 8 wks @ 40ºF, move to 70ºF (21ºC) for germ. in light , 70 ,( 12x6 ), herbaceous , Blue , open wooded ,
P. virgatus ssp. arizonicus , Habroanthus ,( 5 ), Sow under thin cover @ 40ºF (4ºC) ,( 12x5 ), herbaceous , Violet , dry upland ,
P. virgatus ssp. virgatus , Habroanthus ,( 5 ), Sow under thin cover @ 40ºF (4ºC) ,( 12x5 ), herbaceous , Violet , dry upland ,
P. vizcainensis , Peltanthera ,( ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 6 wks @ 40ºF (4ºC) ,( 72x ), herbaceous , Red , dryland ,
P. vulcanellus , Perfoliati ,( 8 ), Sow under thin cover 8 wks @ 40ºF (4ºC),( 12x ), subshrub , lavender , alpine ,
P. wardii , Habroanthus ,( 5 ), Surface sow 8 wks @ 40ºF for germ. in light ,( 6x2 ), herbaceous , Blue , open wooded
P. washingtonensis , Proceri ,( 5 ), Sow under thin cover @ 40ºF (4ºC) ,( 10x5 ), herbaceous , Blue , moist ground ,
P. watsonii , Proceri ,( 6 ), Sow under thin cover 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) for germ.,( 24x6 ), herbaceous , Blue, Purple , dry upland ,
P. whippleanus , Humiles ,( 3 ), Surface sow 8 wks @ 40ºF (4ºC), move to 70ºF (20ºC) for germ. in light ,( 20x6 ), herbaceous , Violet , alpine ,
P. wilcoxii , Humiles ,( 6 ), Surface sow 8 wks @ 40ºF for germ. in light ,( 20x10 ), herbaceous , Blue , open wooded ,
P. wisconsinensis , Penstemon ,( ), Sow under thin cover 8 wks @ 40ºF (4ºC),( 30x ), herbaceous , Lilac , plains ,
P. wislizeni , Elmigera ,( ), Sow fresh seed @ 70ºF (21ºC), sow stored seed under thin cover 6 wks @ 40ºF (4ºC) ,( 24x ), mat , Scarlet , dryland ,
P. wrightii , Centranthifolii ,( ),Sow barely covered 8 wks @ 40ºF (4ºC), move to 50ºF (10ºC) under light; if no germ. in 4 wks, move to 60ºF (16ºC) ,( 36x ), herbaceous , Red , mixed ,

Notes:  

The habit and native habitat columns (shown in green color) are based on a chart in Peter James & David Way's book "The Gardener's Guide to Growing Penstemons".

The following pairs of species names are synonyms.  The first name is the rejected name, and the second name is the preferred name.

P. alpinus   =  P. glaber ssp. alpinus
P. angustifolius v. caudatus   =  P. caudatus
P. brandegei   =  P. glaber ssp. brandegei
P. bridgesii   =  P. rostriflorus
P. parvulus   =  P. azureus v. parvulus
P. speciosus v. kennedyi   =  P. speciosus "Kennedyi"
P. tusharensis   =  P. caespitosus v. suffruticosus
P. yampaensis   =  P. acaulis v. yampaensis
P. menziesii   =  P. davidsonii v. menziesii
P. virgatus v. asi-greyi   =  P. unilateralis


|This page covers specific epithets K through Z and synonyms.|     |Jump to A through J | Skip to  | K | M | N | O | P | R | S  | T | U to Z | Synonyms
Return to Index