View source for Penstemon pratensis

{{Treatment/ID
|accepted_name=Penstemon pratensis
|accepted_authority=Greene
|publications={{Treatment/Publication
|title=Leafl. Bot. Observ. Crit.
|place=1: 165. 1906
|year=1906
}}
|common_names=White-flower beardtongue
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Plantaginaceae;Penstemon;Penstemon subg. Penstemon;Penstemon sect. Penstemon;Penstemon pratensis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Plantaginaceae]]</div><div class="higher-taxon"><small>genus</small>[[Penstemon]]</div><div class="higher-taxon"><small>subgenus</small>[[Penstemon subg. Penstemon]]</div><div class="higher-taxon"><small>section</small>[[Penstemon sect. Penstemon]]</div><div class="higher-taxon"><small>species</small>[[Penstemon pratensis]]</div></div>
|volume=Volume 17
|mention_page=page 186, 187
|treatment_page=page 215
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism growth form"><b>Herbs.</b></span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem atypical some measurement;stem some measurement;stem pubescence;stem pubescence"><b>Stems </b>ascending to erect, 15–40 (–65) cm, glabrous, not glaucous.</span> <span class="statement" id="st-d0_s2" data-properties=""><b>Leaves </b>basal and cauline, not leathery, glabrous;</span> <span class="statement" id="st-d0_s3" data-properties="leaf position;leaf position;leaf texture;leaf pubescence;leaf position;whole-organism position;whole-organism position;blade shape;base shape;margin architecture or shape;apex shape">basal and proximal cauline (23–) 40–90 (–120) × 6–14 (–24) mm, blade spatulate to elliptic, base tapered, margins entire, apex rounded to obtuse or acute;</span> <span class="statement" id="st-d0_s4" data-properties="cauline blade quantity;cauline blade architecture;proximal height or length or size;proximal architecture;proximal length;proximal width;blade shape;base shape;base architecture;base architecture;margin architecture or shape;apex shape">cauline 3–6 pairs, sessile or proximals short to long-petiolate, 24–115 × 4–15 mm, blade oblanceolate to lanceolate, base tapered to truncate or clasping, margins entire, apex obtuse to acute.</span> <span class="statement" id="st-d0_s5" data-properties="thyrse architecture;thyrse shape;thyrse some measurement;axis pubescence;verticillaster quantity;cyme architecture;cyme quantity"><b>Thyrses </b>interrupted, cylindric, 6–15 cm, axis glabrous, verticillasters 2–6, cymes 3–11-flowered, 2 per node;</span> <span class="statement" id="st-d0_s6" data-properties="proximal bract shape;proximal bract length;proximal bract width;margin architecture or shape">proximal bracts lanceolate, 8–50 × 1–8 mm, margins entire;</span> <span class="statement" id="st-d0_s7" data-properties="peduncle orientation;peduncle pubescence;pedicel orientation;pedicel pubescence">peduncles and pedicels erect, glabrous.</span> <span class="statement" id="st-d0_s8" data-properties="calyx lobe shape;calyx lobe length;calyx lobe width;apex shape;apex pubescence"><b>Flowers:</b> calyx lobes ovate to lanceolate, 3–5.5 × 1.2–2.1 mm, apex acute to short-caudate, glabrous;</span> <span class="statement" id="st-d0_s9" data-properties="corolla coloration;corolla coloration;corolla some measurement;corolla pubescence;corolla coloration;corolla pubescence;tube some measurement;throat shape;throat diameter;throat shape">corolla white or lavender, without nectar guides, funnelform, 10–15 mm, glabrous externally, moderately yellow or white-lanate internally abaxially, tube 4–5 mm, throat slightly inflated, 3–4 mm diam., 2-ridged abaxially;</span> <span class="statement" id="st-d0_s10" data-properties="stamen length or size;stamen position;pollen-sac arrangement;pollen-sac shape;pollen-sac distance;pollen-sac dehiscence;connective architecture or dehiscence;side pubescence;suture architecture or pubescence or relief">stamens: longer pair reaching orifice or slightly exserted, pollen-sacs opposite, navicular, 0.6–0.8 mm, dehiscing completely, connective splitting, sides glabrous, sutures smooth;</span> <span class="statement" id="st-d0_s11" data-properties="staminode some measurement;staminode position;staminode diameter;tip course;tip position or shape;tip some measurement;tip pubescence;hair coloration;hair some measurement;hair pubescence">staminode 6–7 mm, included, 0.3–0.4 mm diam., tip straight, distal 0.5–3 mm moderately pilose, hairs yellow, to 0.8 mm, rarely glabrous;</span> <span class="statement" id="st-d0_s12" data-properties="style some measurement">style 7–8 mm.</span> <span class="statement" id="st-d0_s13" data-properties=""><b>Capsules </b>4–7 × 3–4 mm, glabrous.</span> <span class="statement" id="st-d0_s14" data-properties="capsule length;capsule width;capsule pubescence;2n chromosome quantity">2n = 32.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Jul.
|habitat=Moist meadows, stream banks, aspen woodlands.
|elevation=1300–2800 m.
|distribution=Idaho;Nev.;Oreg.
|discussion=<p>Penstemon pratensis is known from the northern Central Great Basin and Owyhee Desert regions of the northern Great Basin. The species is documented in Owyhee County, Idaho, Elko and Eureka counties, Nevada, and Harney and Malheur counties, Oregon. In Elko County, Nevada, where it occurs with P. rydbergii var. oreocharis, P. pratensis appears to occur mostly in the East Humboldt Range and Ruby Mountains, south and east of the Humboldt River. Most populations of P. rydbergii var. oreocharis in that county occur north and west of the Humboldt River in the Independence and Jarbidge mountains.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Penstemon pratensis
|authority=Greene
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Plantaginaceae
|phenology=Flowering Jun–Jul.
|habitat=Moist meadows, stream banks, aspen woodlands.
|elevation=1300–2800 m.
|distribution=Idaho;Nev.;Oreg.
|reference=None
|publication title=Leafl. Bot. Observ. Crit.
|publication year=1906
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V17/V17_516.xml
|genus=Penstemon
|subgenus=Penstemon subg. Penstemon
|section=Penstemon sect. Penstemon
|species=Penstemon pratensis
|2n chromosome quantity=32
|apex pubescence=glabrous
|apex shape=acute;short-caudate
|axis pubescence=glabrous
|base architecture=clasping;truncate
|base shape=tapered;tapered
|blade shape=oblanceolate;lanceolate
|calyx lobe length=3mm;5.5mm
|calyx lobe shape=ovate;lanceolate
|calyx lobe width=1.2mm;2.1mm
|capsule length=4mm;7mm
|capsule pubescence=glabrous
|capsule width=3mm;4mm
|cauline blade architecture=sessile
|cauline blade quantity=3;6
|connective architecture or dehiscence=splitting
|corolla coloration=yellow;lavender;white
|corolla pubescence=white-lanate;glabrous
|corolla some measurement=10mm;15mm
|cyme architecture=3-11-flowered
|cyme quantity=2
|hair coloration=yellow
|hair pubescence=glabrous
|hair some measurement=0mm;0.8mm
|leaf position=basal;cauline;basal
|leaf pubescence=glabrous
|leaf texture=not leathery
|margin architecture or shape=entire;entire;entire
|pedicel orientation=erect
|pedicel pubescence=glabrous
|peduncle orientation=erect
|peduncle pubescence=glabrous
|pollen-sac arrangement=opposite
|pollen-sac dehiscence=dehiscing
|pollen-sac distance=0.6mm;0.8mm
|pollen-sac shape=navicular
|proximal architecture=long-petiolate
|proximal bract length=8mm;50mm
|proximal bract shape=lanceolate
|proximal bract width=1mm;8mm
|proximal height or length or size=short
|proximal length=24mm;115mm
|proximal width=4mm;15mm
|side pubescence=glabrous
|stamen length or size=longer
|stamen position=exserted
|staminode diameter=0.3mm;0.4mm
|staminode position=included
|staminode some measurement=6mm;7mm
|stem atypical some measurement=40cm;65cm
|stem orientation=ascending;erect
|stem pubescence=not glaucous;glabrous
|stem some measurement=15cm;40cm
|style some measurement=7mm;8mm
|suture architecture or pubescence or relief=smooth
|throat diameter=3mm;4mm
|throat shape=2-ridged;inflated
|thyrse architecture=interrupted
|thyrse shape=cylindric
|thyrse some measurement=6cm;15cm
|tip course=straight
|tip position or shape=distal
|tip pubescence=pilose
|tip some measurement=0.5mm;3mm
|tube some measurement=4mm;5mm
|verticillaster quantity=2;6
|whole-organism position=cauline;proximal
|whole_organism growth form=herb
}}<!--

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