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Vascular Plants of California
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Eriastrum tracyi

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 W. Patterson, family description, key to genera, except as noted
Scientific Editor: Robert W. Patterson, Thomas J. Rosatti.
Genus: EriastrumView DescriptionDichotomous Key

Common Name: WOOLLY-STAR
Habit: Annual, perennial, or subshrub; often woolly, glandular or not. Stem: generally erect, branching from base or above, sometimes unbranched. Leaf: cauline, alternate, entire to pinnately lobed; lobes generally linear or lanceolate. Inflorescence: terminal, head-like or flower occasionally 1, bracted, lightly to densely woolly; bracts leaf-like; flowers sessile or subsessile. Flower: calyx lobes equal to unequal, lightly to densely woolly, sometimes glandular-puberulent; corolla funnel-shaped to salverform, radial or bilateral, white or blue to purple or yellow; stamens fused to corolla at base, equal or unequal, anthers sagittate, pollen white to blue; ovary 3-chambered, style included or exserted, stigma 3-lobed. Fruit: capsule loculicidal. Seed: 1--11 per chamber.
Etymology: (Greek: woolly star)
eFlora Treatment Author: Sarah J. De Groot
Reference: De Groot 2016 Aliso 34(2):25--152.
Eriastrum tracyi H. Mason
Habit: Annual, 10--25 cm. Stem: erect, simple or branched above, lightly woolly. Leaf: 10--25 mm, woolly, entire to 3-lobed, lobes linear. Inflorescence: heads often clustered at stem tips, densely woolly, +- 1--5-flowered. Flower: calyx 5--9.5 mm, densely woolly, sinuses unequal, lobes subequal to strongly unequal; corolla (4.2)5.5--10.5 mm, sub-salverform to narrowly funnel-shaped, radial, tube 2.9--6.2 mm, reddish-purple to white, often with darker purplish ring just proximal to throat, throat 0.5--2 mm, white to yellow, tube + throat generally slightly < calyx, +- 2.8--7.6 mm, lobes 1.3--4 mm, +- 1/4 to 1/3 corolla length, light blue, pinkish, lavender, or white; stamens included 0.6 mm below corolla sinuses to exserted 1.3 mm past sinuses, attached at throat base (0.2)0.5--1.5(2) mm below sinuses, free portion +- 0.75--1.5 mm, equal, anthers 0.75--1 mm; pistil 4--6.5(7.1) mm, +- equal to stamens. Fruit: capsule 4--5 mm, oblong ellipsoid, 3-sided, seeds generally 1 or occasionally 2 per chamber. Seed: slimy when wetted, +- 1.8--3.2 mm, light gray-brown, elliptic to slightly ovate, occasionally angular.
Ecology: Shale barrens, open hillsides, ridge tops, flats, floodplains, dry washes, disturbed areas, generally in chaparral, grassland, savannah, woodland, forest; Elevation: 320--1610 m. Bioregional Distribution: KR, NCoRH, NCoRI, e CaRH, c&s SN, SnFrB, MP (ne Shasta Co.). Flowering Time: May--Jun Note: Threatened by habitat loss from agriculture and development. Probably a species complex; needs study.
Synonyms: Eriastrum brandegeeae H. Mason
Jepson eFlora Author: Sarah J. De Groot
Reference: De Groot 2016 Aliso 34(2):25--152.
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

Previous taxon: Eriastrum sparsiflorum
Next taxon: Eriastrum virgatum

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botanical illustration including Eriastrum tracyi

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Citation for this treatment: Sarah J. De Groot 2023, Eriastrum tracyi, in Jepson Flora Project (eds.) Jepson eFlora, Revision 12,, accessed on June 22, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on June 22, 2024.

Eriastrum tracyi
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©2014 Chris Winchell
Eriastrum tracyi
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©2014 Steve Matson
Eriastrum tracyi
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©2014 Chris Winchell
Eriastrum tracyi
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©2021 Neal Kramer
Eriastrum tracyi
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©2012 Neal Kramer

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Geographic subdivisions for Eriastrum tracyi:
KR, NCoRH, NCoRI, e CaRH, c&s SN, SnFrB, MP (ne Shasta Co.).
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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).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).