Jepson eFlora: Taxon page
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Dichelostemma congestum

Higher Taxonomy
Family: ThemidaceaeView DescriptionDichotomous Key

Habit: Perennial herb from corm, outer coat fibrous [membranous]. Leaf: basal, 1--10, linear to narrow-lanceolate. Inflorescence: scapose, generally umbel-like; scape erect, generally 1(2), cylindric, generally rigid, occasionally wavy to twining; flower bracts 2--4[10], not enclosing flower buds. Flower: perianth parts 6 in 2 petal-like whorls, free or +- fused below into tube; staminodes 0 or 3; stamens 3 or 6, free or fused to perianth, occasionally appendaged; ovary superior, chambers 3, ovules 2--several per chamber. Fruit: capsule, loculicidal.
Genera In Family: 10--11 genera, 60--70 species: western North America.
eFlora Treatment Author: J. Chris Pires, except as noted
Scientific Editor: Dale W. McNeal, Thomas J. Rosatti.
Genus: DichelostemmaView DescriptionDichotomous Key

Habit: Daughter corms generally sessile. Leaf: 2--5, generally keeled, entire, glabrous, occasionally withered by flowering. Inflorescence: raceme- or umbel-like, generally dense; scape generally curved, twisted, or twining, cylindric; bracts +- papery; pedicels generally < flowers. Flower: perianth tube cylindric to bell-shaped, appendages at junction of tube, lobes forming crown; staminodes 0 (3, stamen-like); stamens 3, equal, or 6, unequal, 3 smaller, filaments fused to perianth tube, forming crown-like tube outside anthers, anthers attached at base; style 1, stigma weakly 3-lobed. Fruit: generally sessile, generally ovoid, 3-angled. Seed: sharp-angled, black-crusted.
Species In Genus: 5 species: western United States, especially northern California, northern Mexico. Etymology: (Greek: toothed crown, from perianth appendages)
eFlora Treatment Author: J. Chris Pires & Glenn Keator

Dichelostemma congestum (Sm.) Kunth
Leaf: 3--4, 4--35 cm, +- glaucous, keeled. Inflorescence: raceme-like, dense; scape 30--90 cm, +- scabrous; bracts wide-lanceolate, pale purple to green; pedicels 1--6 mm; flowers 6--15. Flower: perianth blue-purple, tube 8--10 mm, narrow-ovoid, +- narrowed above ovary, lobes ascending, 8--10 mm, crown erect, leaning away from anthers, 5--6 mm, narrow-lanceolate, deep-notched, +- purple; stamens 3, anthers 4--5 mm; ovary sessile 4--6 mm, style 5--6 mm. Chromosomes: n=9,18.
Ecology: Open woodland, grassland; Elevation: < 2000 m. Bioregional Distribution: NW, CaR, n SN, SnFrB; Distribution Outside California: to British Columbia. Flowering Time: Apr--Jun
Synonyms: Brodiaea congesta Sm.; Hookera congesta (Sm.) Jeps.
eFlora Treatment Author: J. Chris Pires & Glenn Keator
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botanical illustration including Dichelostemma congestum


Citation for this treatment: J. Chris Pires & Glenn Keator 2016. Dichelostemma congestum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on February 07, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on February 07, 2016.

Dichelostemma congestum
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© 2008 Keir Morse
Dichelostemma congestum
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© 2010 Neal Kramer
Dichelostemma congestum
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© 2008 Keir Morse
Dichelostemma congestum
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© 2009 Gary A. Monroe
Dichelostemma congestum
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© 2010 Barry Breckling
Dichelostemma congestum
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© 2002 Tony Morosco

More photos of Dichelostemma congestum in CalPhotos

Geographic subdivisions for Dichelostemma congestum:
NW, CaR, n SN, SnFrB;
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.