Jepson eFlora: Taxon page
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Stenanthium occidentale

Higher Taxonomy
Family: MelanthiaceaeView DescriptionDichotomous Key

Habit: Perennial herb, from rhizome or bulb, or rhizomes ending in weakly developed bulbs, scapose or not. Leaf: alternate, whorled, or mostly basal and spirally arranged, deciduous after 1 year or not. Inflorescence: raceme, panicle, or flowers 1. Flower: perianth parts 6, in 2 petal-like whorls or of sepals and petals, free or fused below, +- spreading; stamens 6, from perianth, anthers attached at base or near middle; ovary superior or partly inferior, chambers 3, styles 3, persistent. Fruit: capsule, loculicidal or septicidal.
Genera In Family: 10 genera, 130 species: northern hemisphere. Note: W North America Zigadenus moved to Toxicoscordion.
eFlora Treatment Author: Dale W. McNeal, except as noted
Scientific Editor: Dale W. McNeal, Thomas J. Rosatti.
Genus: StenanthiumView Description 

Stem: +- scapose, simple or branched. Leaf: mostly basal, grass-like; cauline 1--2, much reduced; deciduous after 1 year. Flower: nodding, unisexual or not; perianth parts free or +- fused at base, glands 0; filaments wider at base, anthers attached near middle, 1-chambered; ovary partly inferior (at base), ovoid. Fruit: septicidal. Seed: oblong, coat loose, winged at both ends.
Species In Genus: 5 species: North America, Asia. Etymology: (Greek: narrow flower)

Stenanthium occidentale A. Gray
Habit: Bulb 2--4 cm. Stem: 20--50 cm. Leaf: 10--30 cm, 3--15 mm wide. Inflorescence: raceme or panicle, 10--20 cm; bracts lance-linear, scarious; pedicels 5--30 mm, ascending. Flower: 1--2 cm, bell-shaped; perianth parts lance-oblong, pale green-yellow to +- purple, especially near margins or not, tips recurved. Fruit: 15--20 mm (including persistent styles). Seed: +- 3 mm. Chromosomes: n=8.
Ecology: Moist banks, thickets, meadows; Elevation: 1500--1900 m. Bioregional Distribution: KR; Distribution Outside California: to western Canada, Montana. Flowering Time: Late May--Jul
eFlora Treatment Author: Dale W. McNeal
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botanical illustration including Stenanthium occidentale


Citation for this treatment: Dale W. McNeal 2016. Stenanthium occidentale, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 06, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 06, 2016.

Stenanthium occidentale
click for enlargement
© 2008 Aaron Schusteff
Stenanthium occidentale
click for enlargement
© 2008 Aaron Schusteff
Stenanthium occidentale
click for enlargement
© 2008 Aaron Schusteff
Stenanthium occidentale
click for enlargement
© 2009 Barry Breckling
Stenanthium occidentale
click for enlargement
© 2008 Aaron Schusteff

More photos of Stenanthium occidentale in CalPhotos

Geographic subdivisions for Stenanthium occidentale:
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).

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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.