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 densifolium

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 densifolium (Benth.) H. Mason
Habit: Subshrub or perennial herb from woody caudex, glabrous to woolly. Stem: 8--90 cm, erect or spreading, often branched from base and sometimes above, outer layers sometimes flaking, axillary short shoots sometimes present. Leaf: 10--50 mm, woolly to subglabrous, lobes 0 or 1--15, linear to lanceolate. Inflorescence: generally terminal, sometimes persisting, lightly to densely woolly, flowers 1--40+. Flower: calyx 5--11 mm, woolly, sometimes glandular, lobes equal or subequal to unequal; corolla 10.5--33 mm, radial, funnel-shaped to salverform, tube 4.5--19.5 mm, white to pale blue, lavender, pink, or purple, base sometimes yellowish, throat +- 0.9--5.7 mm, white to pale blue to lavender, occasionally purple, pale yellow, or pink, tube plus throat 6.4--23 mm, lobes 3.5--11 mm, white to deep blue, veins often darker blue or purple, occasionally spotted; stamens exserted 2.1--7 mm beyond corolla sinuses, equaling or < corolla lobes, attached <= 3 mm below sinus, free portion of stamen 4--10 mm, equal to subequal, anthers 2--4 mm; pistil +- 11.5--30 mm, shorter in younger flowers, style +- 10--27 mm, white to pale blue, lavender, or purple, stigma lobes 0.5--1.5 mm, often white. Fruit: capsule +- (1.3)2.5--6 mm, tan, seeds generally +- 1--11 per chamber. Seed: (1.3)1.8--3.5 mm, tan to brown or gray-brown, elliptic to oblong or angular.
Note: Probably a species complex, needs study.
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 calocyanum
Next taxon: Eriastrum densifolium subsp. austromontanum

Name Search

Please use this Google Form for Contact/Feedback

Citation for this treatment: Sarah J. De Groot 2023, Eriastrum densifolium, in Jepson Flora Project (eds.) Jepson eFlora, Revision 12,, accessed on June 19, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on June 19, 2024.

Eriastrum densifolium
click for enlargement
©2014 Keir Morse
Eriastrum densifolium
click for enlargement
©2014 Keir Morse
Eriastrum densifolium
click for enlargement
©2014 Keir Morse
Eriastrum densifolium subsp. mohavense
click for enlargement
©2010 Steve Matson
Eriastrum densifolium subsp. elongatum
click for enlargement
©2021 Neal Kramer

More photos of Eriastrum densifolium
in CalPhotos

Geographic subdivisions for Eriastrum densifolium:
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 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).