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Vascular Plants of California
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Eriastrum luteum
YELLOW WOOLLY-STAR, YELLOW-FLOWERED ERIASTRUM


Higher Taxonomy
Family: PolemoniaceaeView DescriptionDichotomous Key
Common Name: PHLOX FAMILY
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 luteum (Benth.) H. Mason
NATIVE
Habit: Annual. Stem: 5--30 cm, erect, mostly branched above, woolly to subglabrous in age, sometimes with axillary shoots in large plants. Leaf: 6--36(40) mm, thread-like, densely woolly to subglabrous, entire or with 3(5) lobes at base. Inflorescence: heads terminal, sometimes also axillary in large plants, sometimes clustered at stem tips, densely woolly, with 2--15+ flowers; bracts (0)3--5(7)-lobed. Flower: calyx 4--6 mm, densely woolly, lobes subequal; corolla 6.7--9.5 mm, funnel-shaped, tube + throat mostly included within calyx, tube 2.9--3.8 mm, slightly < 1/2 corolla length, white or cream or occasionally pale yellow, throat 0.7--1.5 mm, golden yellow, tube + throat 3.9--5 mm, lobes 2.6--4 mm, +- = tube and +- 2/5 corolla length, golden yellow, often with red to brown spots at base of lobes or top of throat (+- even with sinuses), generally with 1 large spot per lobe, occasionally a few additional smaller spots, spots occasionally 0; stamens exserted 2.4--3.8 mm past corolla sinuses, 0.5 mm < lobes to 0.5 mm > lobes, attached 0.9--1.6 mm below sinuses, free portion 4.5--6.5 mm, equal to subequal, anthers 2--2.5 mm; pistil +- 8.5--10 mm, exserted as far as or slightly beyond stamens, stigma lobes very short, often not apparent, 0.2--0.3(0.5) mm. Fruit: capsule 1.75--3.0 mm, seed (0)1(2) per chamber. Seed: 1.3--1.8 mm, light brown, generally angular.
Ecology: Open areas on gentle slopes, in grassland, oak savannah, woodland; Elevation: 240--580 m. Bioregional Distribution: SCoRO (Monterey, San Luis Obispo cos.). Flowering Time: May--Jun
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

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Citation for this treatment: Sarah J. De Groot 2023, Eriastrum luteum, in Jepson Flora Project (eds.) Jepson eFlora, Revision 12, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=24594, accessed on April 19, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 19, 2024.

Eriastrum luteum
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©2011 Chris Winchell
Eriastrum luteum
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©2011 Chris Winchell
Eriastrum luteum
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©2007 Aaron Schusteff
Eriastrum luteum
click for enlargement
©2011 Chris Winchell
Eriastrum luteum
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©2005 Aaron Schusteff

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Geographic subdivisions for Eriastrum luteum:
SCoRO (Monterey, San Luis Obispo cos.).
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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.
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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.
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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).