Jepson eFlora: Taxon page
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Eriastrum wilcoxii

Higher Taxonomy
Family: PolemoniaceaeView DescriptionDichotomous Key

Habit: Annual, perennial herb, shrub, vine. Leaf: simple or compound, cauline (or most basal), alternate or opposite; stipules 0. Inflorescence: cymes, heads, clusters, or flower 1; bracts in involucres or not. Flower: sepals generally 5, fused at base, translucent membrane generally connecting lobes, torn by fruit; corolla generally 5-lobed, radial or bilateral, salverform to bell-shaped, throat often well defined; stamens generally 5, epipetalous, attached at >= 1 level, filaments of >= 1 length, pollen white, yellow, blue, or red; ovary superior, chambers generally 3, style 1, stigmas generally 3. Fruit: capsule. Seed: 1--many, when wetted swelling or not, gelatinous or not.
Genera In Family: 26 genera, 314 species: America, northern Europe, northern Asia; some cultivated (Cantua, Cobaea (cup-and-saucer vine), Collomia, Gilia, Ipomopsis, Linanthus, Phlox). Note: Leptodactylon moved to Linanthus.
eFlora Treatment Author: Robert Patterson, family description, key to genera
Scientific Editor: Robert Patterson, Thomas J. Rosatti.
Genus: EriastrumView DescriptionDichotomous Key

Habit: Glabrous to woolly, glandular or not. Stem: generally erect. Leaf: cauline, alternate, generally pinnate-lobed or simple; lobes generally linear or lanceolate. Inflorescence: head-like, bracted, generally densely woolly; bracts leaf-like; flowers sessile. Flower: calyx lobes unequal, generally woolly; corolla radial or bilateral, funnel-shaped to salverform; stamens equal or not, anthers generally sagittate, pollen white or blue; style included or exserted. Seed: 1--several per chamber.
Species In Genus: 18 species: western North America. Etymology: (Greek: woolly star) Note: Eriastrum ertterae, Eriastrum rosamondense described since TJM2 (Gowen 2013 J Bot Res Inst Texas 7: 21--24). Apparently more undescribed variation; genus being revised.
eFlora Treatment Author: Sarah De Groot, David Gowen & Robert Patterson

Eriastrum wilcoxii (A. Nelson) H. Mason
Habit: Annual, erect, generally robust, woolly-hairy to occasionally subglabrous. Stem: 3--30 cm. Leaf: 15--30 mm, thread-like, entire or 1--7-lobed near base, densely woolly. Flower: corolla 9--14 mm, generally funnel-shaped, tube 5--8 mm, yellow or white, throat +- 2 mm, yellow or white, lobes 4--5 mm, blue; stamens attached in upper tube or lower throat, 1.5--4.5 mm, unequal, exserted. Seed: generally 3 per chamber. Chromosomes: 2n=14.
Ecology: Desert flats, slopes; Elevation: generally < 2900 m. Bioregional Distribution: SNH, GB, n DMtns; Distribution Outside California: to Idaho, Wyoming. Flowering Time: Jun--Aug Note: Plants in SCoRO with corollas light blue with a dark spot at lobe bases probably an undescribed taxon; study needed.
eFlora Treatment Author: Sarah De Groot, David Gowen & Robert Patterson
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Citation for this treatment: Sarah De Groot, David Gowen & Robert Patterson 2016. Eriastrum wilcoxii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 28, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on April 28, 2016.

Eriastrum wilcoxii
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© 1988 Gary A. Monroe
Eriastrum wilcoxii
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© 2012 James M. Andre
Eriastrum wilcoxii
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© 1999 Larry Blakely
Eriastrum wilcoxii
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© 2009 Steve Matson
Eriastrum wilcoxii
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© 2009 Steve Matson
Eriastrum wilcoxii
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© 2005 Steve Matson

More photos of Eriastrum wilcoxii in CalPhotos

Geographic subdivisions for Eriastrum wilcoxii:
SNH, GB, n DMtns;
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.