View source for Epilobium septentrionale

{{Treatment/ID
|accepted_name=Epilobium septentrionale
|accepted_authority=(D. D. Keck) R. N. Bowman & Hoch
|publications={{Treatment/Publication
|title=Ann. Missouri Bot. Gard.
|place=66: 897. 1980
|year=1980
}}
|common_names=Northern willowherb
|basionyms={{Treatment/ID/Basionym
|name=Zauschneria septentrionalisd.
|authority=D. Keck
|rank=species
|publication_title=Publ. Carnegie Inst. Wash.
|publication_place=520: 219, figs. 84 [top center], 85 [upper right].  1940
}}
|synonyms={{Treatment/ID/Synonym
|name=Epilobium canum subsp. septentrionale
|authority=(D. D. Keck) P. H. Raven
|rank=subspecies
}}
|hierarchy=Onagraceae;Onagraceae subfam. Onagroideae;Onagraceae tribe Epilobieae;Epilobium;Epilobium sect. Zauschneria;Epilobium septentrionale
|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>tribe</small>[[Onagraceae tribe Epilobieae]]</div><div class="higher-taxon"><small>genus</small>[[Epilobium]]</div><div class="higher-taxon"><small>section</small>[[Epilobium sect. Zauschneria]]</div><div class="higher-taxon"><small>species</small>[[Epilobium septentrionale]]</div></div>
|volume=Volume 10
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>usually not suffruticose, with basal shoots from thickened caudex, often decussate scales at base. <b>Stems</b> decumbent, often matted, grayish green, terete, 5–25 cm, well-branched throughout, densely white-canescent proximally, mixed strigillose, villous, and glandular puberulent distally. <b>Leaves</b> densely spaced, opposite proximal to inflorescence, alternate or fasciculate distally, petiole 0–2 mm, blade grayish green to green, lanceolate or elliptic to narrowly ovate, 1–3.5(–4) × 0.4–1.1 cm, base cuneate or attenuate, margins subentire to low-denticulate, 5–8 teeth per side, veins inconspicuous, 3–5 per side, apex acute, sometimes with caducous dark mucro, surfaces densely white-canescent and eglandular proximally, changing abruptly on inflorescence to glandular puberulent mixed with scattered villous; bracts somewhat reduced. <b>Inflorescences</b> ascending spikes or racemes, densely glandular puberulent. <b>Flowers</b>: buds 12–15 × 4–5.5 mm, subsessile or pedicels 1–2 mm; floral tube same color as petals, 17–23 × 3.5–5 mm, with ring of scales 4–5 mm from base inside; sepals same color as petals, 7–12 × 2.5–3.5 mm; petals red-orange, 8–14 × 5–6.5 mm, apical notch 1.8–2.4 mm; filaments orange or red, those of longer stamens 15–17 mm, those of shorter ones 13–15 mm; anthers 2.8–3.2 × 0.7–1 mm; ovary 5–11 mm, glandular puberulent; style light orange, 40–45 mm, stigma 4-lobed, 0.9–1.1 × 2.2–2.6 mm, exserted 8–10 mm beyond anthers. <b>Capsules</b> ± straight, 20–26 mm, ± beaked, surfaces glandular puberulent; sessile or pedicel 1–3 mm. <b>Seeds</b> broadly to narrowly obovoid, with constriction 0.7–0.8 mm from micropylar end, 1.8–2.4 × 1.1–1.3 mm, chalazal collar inconspicuous, light brown, surface low-papillose; coma easily detached, dingy white, 6–7 mm. <b>2n</b> = 30.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Sep.
|habitat=Rocky ledges and serpentine slopes along rivers.
|elevation=10–1900 m.
|distribution=Calif.
|discussion=<p>Epilobium septentrionale is endemic to northern California, found only in the drainages of the Eel, Mattole, and Trinity rivers in Humboldt, Mendocino, and Trinity counties. The dimorphic pattern of vestiture on this species (eglandular, white-canescent lower leaves versus glandular puberulent upper leaves and bracts) is highly distinctive and not found in any specimens of E. canum. Most collections are relatively uniform in aspect, leaves, flowers, fruits, and seeds, despite the relative isolation from one another in the different river drainages where they occur.</p><!--
--><p>S. R. Seavey and P. H. Raven (1977c) reported an experimental hybrid between Epilobium septentrionale and diploid E. canum subsp. canum; although it had normal chromosome pairing, pollen fertility was reduced (51%).</p>
|tables=
|references=
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-->{{#Taxon:
name=Epilobium septentrionale
|authority=(D. D. Keck) R. N. Bowman & Hoch
|rank=species
|parent rank=section
|synonyms=Epilobium canum subsp. septentrionale
|basionyms=Zauschneria septentrionalisd.
|family=Onagraceae
|phenology=Flowering Aug–Sep.
|habitat=Rocky ledges and serpentine slopes along rivers.
|elevation=10–1900 m.
|distribution=Calif.
|reference=None
|publication title=Ann. Missouri Bot. Gard.
|publication year=1980
|special status=
|source xml=https://xjsachs2@bitbucket.org/aafc-mbb/fna-data-curation.git/src/e39f0e846f172941159b2045254d62d10d9823f6/coarse_grained_fna_xml/V10/V10_305.xml
|subfamily=Onagraceae subfam. Onagroideae
|tribe=Onagraceae tribe Epilobieae
|genus=Epilobium
|section=Epilobium sect. Zauschneria
|species=Epilobium septentrionale
}}<!--

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