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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Previous taxon: Dichelostemma capitatum subsp. pauciflorum
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botanical illustration including Dichelostemma congestum


Citation for this treatment: J. Chris Pires & Glenn Keator 2017. Dichelostemma congestum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 18, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on October 18, 2017.

Dichelostemma congestum
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© 2002 Tony Morosco
Dichelostemma congestum
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© 2009 California Academy of Sciences
Dichelostemma congestum
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© 2008 Keir Morse
Dichelostemma congestum
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© 2012 Gary A. Monroe
Dichelostemma congestum
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© 2008 Keir Morse
Dichelostemma congestum
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© 2007 California Academy of Sciences

More photos of Dichelostemma congestum in CalPhotos

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

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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.