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Eriastrum filifolium

THREAD-LEAVED WOOLLY-STAR


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 filifolium (Nutt.) Wooton & Standl.
NATIVE
Habit: Annual, erect to ascending, lightly woolly, subglabrous in age. Stem: 3--40(45) cm, simple or branched from base or above. Leaf: (3)10--35(60) mm, thread-like, subglabrous to woolly, generally red-brown in age, entire or 5-lobed, lobes thread-like. Inflorescence: heads terminal and axillary, frequently clustered at branch tips, 3--15-flowered, woolly; bracts 3--5-lobed, occasionally entire. Flower: calyx 6--10 mm, woolly, lobes unequal by 1--4 mm; corolla 7--9 mm, salverform to narrowly funnel-shaped, tube 3.2--4.0 mm, +- equal to calyx length, pale yellow to white; throat +- 0.8--1.6 mm, light yellow to white, tube + throat 4.3--5.4 mm, lobes 2.5--3.6 mm, light- to royal-blue or occasionally lavender, veins sometimes darker, sometimes white or dark purple at base; stamens exserted +- 1.1--1.6 mm past corolla sinuses, attached +- 0.8--1.3 mm below sinuses, free portion +- 2--3.5 mm, equal, anthers 1--1.1 mm; pistil at maturity exserted just beyond anthers, at least 4--7 mm, ovary long, cylindric. Fruit: capsule +- 4--5 mm, seeds 3--5(6) per chamber. Seed: +- 1.4--1.7 mm, tan to light brown, angular, sometimes with translucent, unfilled margins.
Ecology: Wash bottoms, floodplains, ditches, slopes, ridges, disturbed areas, in chaparral, coastal sagebrush scrub, grassland; Elevation: 35--940 m. Bioregional Distribution: SW; Distribution Outside California: Baja California. Flowering Time: Apr--May
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)

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Citation for this treatment: Sarah J. De Groot 2023, Eriastrum filifolium, in Jepson Flora Project (eds.) Jepson eFlora, Revision 12, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=24592, accessed on December 02, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on December 02, 2024.

Eriastrum filifolium
click for image enlargement
©2013 Keir Morse
Eriastrum filifolium
click for image enlargement
©2013 Keir Morse
Eriastrum filifolium
click for image enlargement
©2013 Keir Morse
Eriastrum filifolium
click for image enlargement
©2013 Keir Morse
Eriastrum filifolium
click for image enlargement
©2013 Keir Morse

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Geographic subdivisions for Eriastrum filifolium:
SW
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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 occurrence).






 

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 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).