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Chamerion angustifolium subsp. circumvagum

Higher Taxonomy
Family: OnagraceaeView DescriptionDichotomous Key

Habit: Annual to perennial herb (to tree). Leaf: cauline or basal, alternate, opposite, or whorled, generally simple and toothed (to pinnately compound); stipules 0 or generally deciduous. Inflorescence: spike, raceme, panicle, or flowers 1 in axils; bracted. Flower: generally bisexual, generally radial, often opening at either dawn or dusk; hypanthium generally prolonged beyond ovary (measured from ovary tip to sepal base); sepals 4(2--7); petals 4(2--7, rarely 0), often fading darker; stamens 2 × or = sepals in number, anthers 2-chambered, opening lengthwise, pollen interconnected by threads; ovary inferior, chambers generally as many as sepals (sometimes becoming 1), placentas axile or parietal, ovules 1--many per chamber, style 1, stigma 4-lobed (or lobes as many as sepals), club-shaped, spheric, or hemispheric. Fruit: capsule, loculicidal (sometimes berry or indehiscent and nut-like). Seed: sometimes winged or hair-tufted.
Genera In Family: 22 genera, +- 657 species: worldwide, especially western North America; many cultivated (Clarkia, Epilobium, Fuchsia, Oenothera). Note: Gaura moved to Oenothera. Fuchsia magellanica Lam. naturalized in northern California.
eFlora Treatment Author: Warren L. Wagner & Peter C. Hoch, family description, key to genera; treatment of genera by Warren L. Wagner, except as noted
Scientific Editor: Robert Patterson, Bruce G. Baldwin.
Genus: ChamerionView DescriptionDichotomous Key

Habit: Perennial herb, often clumped or forming large colonies by rhizomes. Stem: generally unbranched, strigose or glabrous. Leaf: alternate, generally +- fine-toothed; veins conspicuous or obscure. Inflorescence: raceme. Flower: nodding in bud; hypanthium 0 (except as +- green disk); +- bilateral; sepals 4, spreading; petals 4, entire; stamens 8, subequal, maturing before stigma, anthers attached at middle, pollen grains shed singly, generally blue-gray; stigma spreading-4-lobed. Fruit: straight, cylindric. Seed: many in 1 row per chamber, irregularly netted, with persistent white hair-tuft.
Species In Genus: 8 species: northern temperate montane, boreal.
eFlora Treatment Author: Peter C. Hoch

Chamerion angustifolium (L.) Holub subsp. circumvagum (Mosquin) Hoch
Habit: Plant < 30 dm, generally strongly colonial, +- glabrous to densely strigose distally. Leaf: 1.5--20 cm, lanceolate; midrib strigose abaxially. Inflorescence: dense, generally canescent. Flower: petals generally deep pink to magenta; stamens < pistil, pollen blue-gray. Fruit: 4--10 cm, gray-hairy; pedicel 7--20 mm. Seed: 1--1.3 mm. Chromosomes: 2n=72.
Ecology: Common. Open places, gravel bars, roadsides, especially after fires; Elevation: < 3300 m. Bioregional Distribution: NCo, KR, NCoRO, CaRH, SNH, SnBr, W&I, ne DMtns; Distribution Outside California: circumboreal. Flowering Time: Jul--Sep Note: Chamerion angustifolium subsp. angustifolium (2n=36), farther northern and at higher elevations, might be expected in California.
Synonyms: Epilobium angustifolium L. subsp. circumvagum Mosquin
eFlora Treatment Author: Peter C. Hoch
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botanical illustration including Chamerion angustifolium subsp. circumvagum


Citation for this treatment: Peter C. Hoch 2016. Chamerion angustifolium subsp. circumvagum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 04, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 04, 2016.

Chamerion angustifolium subsp. circumvagum
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© 2001 George W. Hartwell
Chamerion angustifolium subsp. circumvagum
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© 2012 Neal Kramer
Chamerion angustifolium subsp. circumvagum
click for enlargement
© 2011 Neal Kramer
Chamerion angustifolium subsp. circumvagum
click for enlargement
© 2011 Neal Kramer
Chamerion angustifolium subsp. circumvagum
click for enlargement
© 2012 Neal Kramer
Chamerion angustifolium subsp. circumvagum
click for enlargement
© 2009 Barry Breckling

More photos of Chamerion angustifolium subsp. circumvagum in CalPhotos

Geographic subdivisions for Chamerion angustifolium subsp. circumvagum:
NCo, KR, NCoRO, CaRH, SNH, SnBr, W&I, ne DMtns;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.