Jepson eFlora: Taxon page
Vascular Plants of California
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon

Eriastrum eremicum subsp. eremicum


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 eremicum (Jeps.) H. Mason subsp. eremicum
Habit: Annual, erect to spreading, +- 2--30 cm, 1--40 cm wide. Stem: generally much-branched from base or above, young stems green and woolly, older stems dark reddish-brown and subglabrous, sometimes slightly woody at base in age. Leaf: 6--30(45) mm, lightly woolly, subglabrous and sometimes reddish-brown in age, lobes (3)5--9, lateral lobes 2--10 mm. Inflorescence: heads terminal, numerous, 2--15-flowered; bracts sometimes glandular. Flower: calyx 4--7 mm, woolly, lobes subequal; corolla 11--19 mm, well-exserted from calyx and bracts, generally bilateral, narrowly funnel-shaped to salverform, tube 4--8.8 mm, generally <= 1/2 corolla length, white to lavender or pale blue, throat 1.0--4.7 mm, pale blue or lavender to white, or sometimes yellow or with yellow dots, often asymmetric with unequal sinuses, tube +- throat 7.6--12.4 mm, lobes sometimes asymmetric, 4.1--7.8 mm, varying in length by <= 0.9 mm from unequal sinuses, violet, lavender, blue, or almost white, often with darker purplish or reddish streaks on or near veins, tips often twisted; stamens exserted 3.5--5.6 mm past corolla sinuses, attached 0.7--4 mm below sinuses, free portion 2--9 mm long, distinctly unequal in length by 1.0--4.2 mm, filaments often turning upward beyond throat, anthers 1--2.5 mm; pistil 9.9--14.8 mm, equaling or exceeding stamens >= +- 4 mm, ovules 6--12 total, 2--4 per ovary chamber. Fruit: capsule +- 2.5--3.1 mm, tan. Seed: +- 1.0--1.9 mm, mostly angular, sand-colored.
Ecology: Washes, flats, playas, bajadas, hillsides, dunes, in desert scrub, arid woodland; Elevation: 100--1760 m. Bioregional Distribution: n edge SnGb, n&e edges SnBr, e edge PR, D; Distribution Outside California: to Nevada, Arizona, Baja California. Flowering Time: Apr--Jun(Aug--Sep) Note: Eriastrum eremicum subsp. markianum De Groot in Baja California (Mexico), Eriastrum eremicum subsp. yageri (M.E. Jones) H. Mason in Arizona, Eriastrum eremicum subsp. zionis (T.T. Craig) De Groot in Nevada, Utah.
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)

Previous taxon: Eriastrum diffusum subsp. diffusum
Next taxon: Eriastrum ertterae

Botanical illustration including Eriastrum eremicum subsp. eremicumbotanical illustration including Eriastrum eremicum subsp. eremicum

Please use this Google Form for Contact/Feedback

Citation for this treatment: Sarah J. De Groot 2023, Eriastrum eremicum subsp. eremicum, in Jepson Flora Project (eds.) Jepson eFlora, Revision 12,, accessed on July 23, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on July 23, 2024.

Eriastrum eremicum subsp. eremicum
click for image enlargement
©2019 Aaron Schusteff
Eriastrum eremicum subsp. eremicum
click for image enlargement
©2010 Neal Kramer
Eriastrum eremicum subsp. eremicum
click for image enlargement
©2010 Neal Kramer
Eriastrum eremicum subsp. eremicum
click for image enlargement
©2014 Keir Morse
Eriastrum eremicum subsp. eremicum
click for image enlargement
©2014 Keir Morse

More photos of Eriastrum eremicum subsp. eremicum
in CalPhotos

Geographic subdivisions for Eriastrum eremicum subsp. eremicum:
n edge SnGb, n&e edges SnBr, e edge PR, D
1. You can change the display of the base map layer control box in the upper right-hand corner.
2. County and Jepson Region polygons can be turned off and on using the check boxes.
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 occurrence).


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 Flowering-Fruiting Monthly Counts

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).