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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, except as noted
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; key to species by David Gowen, Sarah De Groot.
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 2017. Eriastrum wilcoxii, Revision 3, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 22, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on October 22, 2017.

Eriastrum wilcoxii
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© 1999 Larry Blakely
Eriastrum wilcoxii
click for enlargement
© 1999 Larry Blakely
Eriastrum wilcoxii
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© 1988 Gary A. Monroe
Eriastrum wilcoxii
click for enlargement
© 1999 Larry Blakely
Eriastrum wilcoxii
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© 2005 Steve Matson
Eriastrum wilcoxii
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© 2016 James Morefield

More photos of Eriastrum wilcoxii in CalPhotos

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