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Eriastrum densifolium subsp. austromontanum

MOUNTAIN 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.
Species: Eriastrum densifoliumView Description 


Common Name: PERENNIAL WOOLLY-STAR, GIANT WOOLLY-STAR
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.
Eriastrum densifolium (Benth.) H. Mason subsp. austromontanum (T.T. Craig) H. Mason
NATIVE
Habit: Subshrub, subglabrous to lightly woolly, especially around heads. Stem: 10--30(45) cm, generally branched from base, erect or spreading, axillary branches sometimes present, short spur shoots sometimes in axils. Leaf: 15--35 mm, subglabrous, green, not stiff, lobes (5)7--13(15). Inflorescence: generally terminal, moderately woolly, flowers often <= 20, bracts generally 3--7(9)-lobed, exceeding calyces. Flower: calyx 5--8 mm, densely woolly, lobes unequal to subequal; corolla 10.8--18(23) mm, narrowly funnel-shaped, tube 4.5--10 mm, white to pale blue or lavender, sometimes purple, base sometimes pale yellow, throat 1--2 mm, white to pale blue or lavender, tube + throat 6.4--15 mm, lobes 3.6--7 mm, pale to deep blue, veins often darker; stamens exserted 2.1--3.2 mm past corolla sinus, attached <= 0.5 mm below sinus, free portion 4--6 mm, mostly equal, anthers 2.5--3.5 mm; pistil +- 16--19 mm, glabrous. Fruit: capsule +- 4--4.5 mm, seeds +- 1--5 per chamber. Seed: 2--2.9 mm, light gray-brown, elliptic to oblong, sometimes angular. Chromosomes: 2n=14.
Ecology: Hillsides, knolls, openings in forest, floodplains above creeks, disturbed sites, often in forest or woodland, also chaparral, scrub, or grassland; Elevation: 950--2300 m. Bioregional Distribution: c SNH, s SN, SnJV, CCo, SCoR, SW (exc ChI), SNE, DMtns (Little San Bernardino Mountains); Distribution Outside California: Baja California. Flowering Time: May--Aug
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 densifolium subsp. austromontanum, in Jepson Flora Project (eds.) Jepson eFlora, Revision 12, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=50328, accessed on January 21, 2025.

Citation for the whole project: Jepson Flora Project (eds.) 2025, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on January 21, 2025.

Eriastrum densifolium subsp. austromontanum
click for image enlargement
©2008 Vernon Smith
Eriastrum densifolium subsp. austromontanum
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©1999 Larry Blakely
Eriastrum densifolium subsp. austromontanum
click for image enlargement
©1999 Larry Blakely
Eriastrum densifolium subsp. austromontanum
click for image enlargement
©1999 Larry Blakely

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Geographic subdivisions for Eriastrum densifolium subsp. austromontanum:
c SNH, s SN, SnJV, CCo, SCoR, SW (exc ChI), SNE, DMtns (Little San Bernardino Mountains)
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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).