Jepson eFlora: Taxon page
Vascular Plants of California
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon

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 W. 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.

eFlora Treatment Author: Peter C. Hoch
Reference: Wagner et al. 2007 Syst Bot Monogr 83:78--81
Unabridged Reference: Raven 1976 Ann Missouri Bot Gard 63:326--340
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.
Jepson eFlora Author: Peter C. Hoch
Reference: Wagner et al. 2007 Syst Bot Monogr 83:78--81
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

Previous taxon: Chamerion angustifolium subsp. circumvagum
Next taxon: Chylismia

Name Search

Botanical illustration including Chamerion latifolium

botanical illustration including Chamerion latifolium

Please use this Google Form for Contact/Feedback

Citation for this treatment: Peter C. Hoch 2012, Chamerion latifolium, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on December 07, 2023.

Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora,, accessed on December 07, 2023.

Chamerion latifolium
click for enlargement
©2017 Dana York
Chamerion latifolium
click for enlargement
©2015 Barry Breckling
Chamerion latifolium
click for enlargement
©2017 Dana York
Chamerion latifolium
click for enlargement
©2015 Barry Breckling
Chamerion latifolium
click for enlargement
©2017 Dana York

More photos of Chamerion latifolium
in CalPhotos

Geographic subdivisions for Chamerion latifolium:
n&c SNH
1. You can change the display of the base map layer control box in the upper right-hand corner.
2. County and Jepson Region polygons can be turned off and on using the check boxes.
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).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).