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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 2017. Chamerion angustifolium subsp. circumvagum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 19, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on October 19, 2017.

Chamerion angustifolium subsp. circumvagum
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© 2008 Thomas Stoughton
Chamerion angustifolium subsp. circumvagum
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© 2011 Neal Kramer
Chamerion angustifolium subsp. circumvagum
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© 2017 Keir Morse
Chamerion angustifolium subsp. circumvagum
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© 2005 George W. Hartwell
Chamerion angustifolium subsp. circumvagum
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© 2012 Neal Kramer
Chamerion angustifolium subsp. circumvagum
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© 2009 Keir Morse

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. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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.