View source for Epilobium densiflorum

{{Treatment/ID
|accepted_name=Epilobium densiflorum
|accepted_authority=(Lindley) Hoch & P. H. Raven
|publications={{Treatment/Publication
|title=Phytologia
|place=73: 457. 1993
|year=1993
}}
|common_names=Denseflower willowherb
|basionyms={{Treatment/ID/Basionym
|name=Oenothera densiflora
|authority=Lindley
|rank=species
|publication_title=Edwards’s Bot. Reg.
|publication_place=19: plate 1593.  1833
}}
|synonyms={{Treatment/ID/Synonym
|name=Boisduvalia bipartita
|authority=Greene
|rank=species
}} {{Treatment/ID/Synonym
|name=B. densiflora
|authority=(Lindley) Bartling
|rank=species
}} {{Treatment/ID/Synonym
|name=B. densiflora var. bipartita
|authority=(Greene) Jepson
|rank=variety
}} {{Treatment/ID/Synonym
|name=B. densiflora var. imbricata
|authority=Greene
|rank=variety
}} {{Treatment/ID/Synonym
|name=B. densiflora var. montana
|authority=Jepson
|rank=variety
}} {{Treatment/ID/Synonym
|name=B. densiflora var. pallescens
|authority=Suksdorf
|rank=variety
}} {{Treatment/ID/Synonym
|name=B. densiflora var. salicina
|authority=(Rydberg) Munz
|rank=variety
}} {{Treatment/ID/Synonym
|name=B. imbricata
|authority=(Greene) A. Heller
|rank=species
}} {{Treatment/ID/Synonym
|name=B. salicina
|authority=Rydberg
|rank=species
}} {{Treatment/ID/Synonym
|name=B. sparsiflora
|authority=A. Heller
|rank=species
}} {{Treatment/ID/Synonym
|name=B. sparsifolia
|authority=A. Nelson & P. B. Kennedy
|rank=species
}} {{Treatment/ID/Synonym
|name=O. densiflora var. imbricata
|authority=(Greene) H. Léveillé
|rank=variety
}}
|hierarchy=Onagraceae;Onagraceae subfam. Onagroideae;Epilobium;Epilobium sect. Pachydium;Epilobium densiflorum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Onagraceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Onagraceae subfam. Onagroideae]]</div><div class="higher-taxon"><small>genus</small>[[Epilobium]]</div><div class="higher-taxon"><small>section</small>[[Epilobium sect. Pachydium]]</div><div class="higher-taxon"><small>species</small>[[Epilobium densiflorum]]</div></div>
|volume=Volume 10
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>usually with taproot, sometimes with loose network of roots. <b>Stems</b> erect or ascending, terete, 4–150 cm, simple or branched with strong central axis, proximal branches ascending or suberect, villous or strigillose, often mixed glandular puberulent distally. <b>Leaves</b> opposite and often early-deciduous proximally, alternate and crowded distally, usually subsessile, rarely petiole 1–2 mm, blade usually narrowly lanceolate to sublinear, rarely to lanceolate, 1.4–7.5(–9.2) × 0.5–1.4 cm, base cuneate to attenuate, margins remotely to sharply serrulate, 5–12 teeth per side, lateral veins obscure, 2–5 per side, apex acute, surfaces densely villous and/or strigillose; bracts broader than cauline leaves, broadly lanceolate to ovate or subrotund, 0.5–2.5 × 0.3–1.8 cm, long-acuminate, sometimes folded on midrib. <b>Inflorescences</b> erect spikes, congested, simple, densely villous and strigillose, sometimes mixed glandular puberulent. <b>Flowers</b> erect, often hidden within subtending bracts, usually chasmogamous; buds sessile, narrowly elongate, 2–4 mm; floral tube 1.3–3.8 × 1–2.2 mm, ring of hairs 0.6–2 mm distal to base inside; sepals 2–7.5 × 0.5–2.2 mm, apex acute; petals rose-purple, magenta, pink, or white, 3–9.5(–11.5) × 1.2–5(–6.2) mm, apical notch 0.8–3.8 mm; filaments dark pink, those of longer stamens 1.5–4.5 mm, those of shorter ones 0.5–1.9 mm; anthers yellow, 0.5–1.2 × 0.3–0.7 mm; ovary 2–5 mm, densely villous, often mixed glandular puberulent; style white, 2.2–5.5(–7.5) mm, glabrous, stigma subcapitate to irregularly 4-lobed, 0.3–0.8 × 0.3–1 mm, surrounded by longer anthers. <b>Capsules</b> cylindrical to subfusiform, 4–11 mm, beak to 0.5 mm, central column persistent, surfaces densely villous; subsessile or pedicel 1–2.5 mm. <b>Seeds</b> 3–8 per locule, irregularly angular-fusiform, 1.2–1.6(–1.9) × 0.4–1 mm, without a chalazal collar, light brown, surface irregularly reticulate with raised cells. <b>2n</b> = 20.</span><!--

-->{{Treatment/Body
|phenology=Flowering May–Oct.
|habitat=Vernally wet places, moist pastures, woodlands, meadows, along streams and ditches, alluvial valleys, often on low ground in volcanic or sandy soils.
|elevation=0–2600 m.
|distribution=B.C.;Ariz.;Calif.;Idaho;Mont.;Nev.;Oreg.;Utah;Wash.;Mexico (Baja California).
|discussion=<p>Epilobium densiflorum is an extremely variable species that changes its aspect through the flowering season. Collections made very early in the season may include only well-spaced, narrowly lanceolate leaves, the proximal ones usually opposite, and a short, sparse, somewhat open inflorescence. A late-season collection, even from the same population, may entirely lack cauline leaves, and consist instead of bare, peeling stems topped by dense, tightly imbricate-bracted inflorescences, with each broad bract enclosing a capsule or flower.</p><!--
--><p>Boisduvalia douglasii Spach is an illegitimate substitute for Oenothera densiflora Lindley and pertains here.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Epilobium densiflorum
|authority=(Lindley) Hoch & P. H. Raven
|rank=species
|parent rank=section
|synonyms=Boisduvalia bipartita;B. densiflora;B. densiflora var. bipartita;B. densiflora var. imbricata;B. densiflora var. montana;B. densiflora var. pallescens;B. densiflora var. salicina;B. imbricata;B. salicina;B. sparsiflora;B. sparsifolia;O. densiflora var. imbricata
|basionyms=Oenothera densiflora
|family=Onagraceae
|phenology=Flowering May–Oct.
|habitat=Vernally wet places, moist pastures, woodlands, meadows, along streams and ditches, alluvial valleys, often on low ground in volcanic or sandy soils.
|elevation=0–2600 m.
|distribution=B.C.;Ariz.;Calif.;Idaho;Mont.;Nev.;Oreg.;Utah;Wash.;Mexico (Baja California).
|reference=None
|publication title=Phytologia
|publication year=1993
|special status=
|source xml=https://xjsachs2@bitbucket.org/aafc-mbb/fna-data-curation.git/src/1f4bf54ae2f7dbd5376c45b4fe1b388e15b53086/coarse_grained_fna_xml/V10/V10_297.xml
|subfamily=Onagraceae subfam. Onagroideae
|genus=Epilobium
|section=Epilobium sect. Pachydium
|species=Epilobium densiflorum
}}<!--

-->[[Category:Treatment]][[Category:Epilobium sect. Pachydium]]