View source for Penstemon filiformis

{{Treatment/ID
|accepted_name=Penstemon filiformis
|accepted_authority=(D. D. Keck) D. D. Keck in L. Abrams and R. S. Ferris
|publications={{Treatment/Publication
|title=Ill. Fl. Pacific States
|place=3: 761. 1951
|year=1951
}}
|common_names=Thread-leaf beardtongue
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Penstemon laetus subsp. filiformis
|authority=D. D. Keck
|publication_title=Univ. Calif. Publ. Bot.
|publication_place=16: 394. 1932
}}
|synonyms=
|hierarchy=Plantaginaceae;Penstemon;Penstemon subg. Penstemon;Penstemon sect. Saccanthera;Penstemon filiformis
|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. Saccanthera]]</div><div class="higher-taxon"><small>species</small>[[Penstemon filiformis]]</div></div>
|volume=Volume 17
|mention_page=page 231
|treatment_page=page 233
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>or subshrubs. <b>Stems</b> ascending to erect, 16–50 cm, puberulent to retrorsely hairy, hairs pointed, not glaucous. <b>Leaves</b> cauline, opposite, puberulent, hairs pointed, or glabrous, not glaucous; cauline 8–12 pairs, sessile, 12–70 × 0.5–1(–2) mm, blade linear, base not tapered, margins entire, apex acute. <b>Thyrses</b> interrupted, cylindric, 9–22 cm, axis glandular-pubescent, verticillasters 1–5, cymes 1–3-flowered, (1 or)2 per node; proximal bracts linear, 9–30 × 0.5–1 mm; peduncles and pedicels spreading to ascending, glandular-pubescent. <b>Flowers</b>: calyx lobes ovate to lanceolate, 2–4.5 × 0.7–1.7 mm, glandular-pubescent; corolla light purple to violet or purple, without nectar guides, funnelform, 13–18 mm, glandular-pubescent externally, glabrous internally, tube 3–4 mm, throat gradually inflated, 5–7 mm diam., 2-ridged abaxially; stamens included or longer pair reaching orifice, filaments glabrous, pollen sacs parallel, 1.2–1.6 mm, distal 1/2 indehiscent, sides pubescent, hairs white, to 0.5 mm near filament attachment, sutures denticulate, teeth to 0.2 mm; staminode 10–12 mm, included or reaching orifice, 0.3–0.5 mm diam., glabrous; style 11–15 mm. <b>Capsules</b> 5–7.5 × 2.5–4 mm. <b>2n</b> = 16.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Jul.
|habitat=Rocky shrublands, pine woodlands.
|elevation=400–600 m.
|distribution=Calif.
|discussion=<p><i>Penstemon filiformis</i> is known from Lake, Shasta, Siskiyou, and Trinity counties.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Penstemon filiformis
|author=
|authority=(D. D. Keck) D. D. Keck in L. Abrams and R. S. Ferris
|rank=species
|parent rank=section
|synonyms=
|basionyms=Penstemon laetus subsp. filiformis
|family=Plantaginaceae
|phenology=Flowering Jun–Jul.
|habitat=Rocky shrublands, pine woodlands.
|elevation=400–600 m.
|distribution=Calif.
|reference=None
|publication title=Ill. Fl. Pacific States
|publication year=1951
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V17/V17_556.xml
|genus=Penstemon
|subgenus=Penstemon subg. Penstemon
|section=Penstemon sect. Saccanthera
|species=Penstemon filiformis
}}<!--

-->[[Category:Treatment]][[Category:Penstemon sect. Saccanthera]]