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Chamerion latifolium

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 latifolium (L.) Holub
Habit: Plant < 7 dm, clumped from woody caudex, +- glaucous to densely strigose. Leaf: 1--10 cm, elliptic to widely lanceolate, glabrous or hairy on margins and veins, +- obtuse to acute. Inflorescence: generally +- strigose. Flower: petals (white) pink to rose-purple; stamens +- = pistil; pollen +- gray. Fruit: 3--10.5 cm, +- glabrous to gray-hairy; pedicel 5--18 mm. Seed: 1.3--2.4 mm. Chromosomes: 2n=36(California),72.
Ecology: Gravel bars, talus slopes, glacial outwashes; Elevation: 2500--3100 m. Bioregional Distribution: n&c SNH; Distribution Outside California: +- circumboreal. Flowering Time: Jul--Aug
Synonyms: Epilobium latifolium L.
eFlora Treatment Author: Peter C. Hoch
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Previous taxon: Chamerion angustifolium subsp. circumvagum
Next taxon: Chylismia

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botanical illustration including Chamerion latifolium


Citation for this treatment: Peter C. Hoch 2016. Chamerion latifolium, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 29, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on April 29, 2016.

Chamerion latifolium
click for enlargement
© 2015 Barry Breckling
Chamerion latifolium
click for enlargement
© 2015 Barry Breckling
Chamerion latifolium
click for enlargement
© 2015 Barry Breckling

More photos of Chamerion latifolium in CalPhotos

Geographic subdivisions for Chamerion latifolium:
n&c SNH;
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.
View all CCH records

CCH collections by month

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