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Eriastrum diffusum  

Explore 1 occurrences

Family: Polemoniaceae
miniature woollystar
[Eriastrum diffusum subsp. jonesii H.Mason]
Eriastrum diffusum image
Max Licher
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CANOTIA (2005)
PLANT: Annual 3-35 cm tall, erect and simple to diffusely branching. LEAVES: subglabrous to sparsely woolly, entire or with 1-2 pairs of lobes near the base of the rachis, 1-3 cm long. CALYX: 6-7 mm long; corolla actinomorphic, narrowly funnelform to slightly zygomorphic, the throat white to yellow, the lobes white to pale blue or bluish lavender, the tube and throat 4-7 mm long, slightly longer than the calyx tube, the lobes 3-5 mm long; stamens inserted on the throat near the sinuses, less than the length of the corolla lobes; filaments slightly unequal in length; pistil 5-7 mm long; style included in the tube or throat. CAPSULE: 2-4 mm long. NOTES: Open sites, desert shrublands, sagebrush, pinyon-juniper woodland: Cochise, Gila, Graham, La Paz, Maricopa, Mohave, Pima, Pinal, Santa Cruz, Yavapai, Yuma cos; 700-5600 ft; Feb-Jun. s CA to w CO, s to n Mex. This species includes plants assigned to E. diffusum subsp. jonesii H. L. Mason, with corollas 10-12 mm long and anthers 0.7-1 mm long. The typical, more common subsp. diffusum usually has shorter corollas and anthers less than 0.8 mm long. These differences do not appear correlated with geographical or ecological distribution. REFERENCES: Dieter H. Wilken and J. Mark Porter, 2005, Vascular Plants of Arizona: Polemoniaceae. CANOTIA 1: 1-37.
Wiggins 1964, Wilken and Porter 2005
Duration: Annual Nativity: Native Lifeform: Forb/Herb General: Delicate annual herb, 3-35 cm tall, erect, stems simple to diffusely branching. Leaves: Basal and cauline, the cauline leaves alternate; needlelike and entire or with 1-2 pairs of lobes near the base; 1-3 cm long; subglabrous to sparsely woolly. Flowers: White to blue-purple, sessile in compact terminal clusters subtended by wolly bracts; calyx 6-7 mm long; corolla radially symmetrical, narrowly funnelform to slightly zygomorphic, throat white to yellow, lobes white to pale blue or bluish lavender, entire corolla 6-11 mm long; stamens inserted on throat near sinuses, shorter than corolla lobes, the filaments unequal in length. Fruits: Capsule 2-4 mm long. Ecology: Found in open sites, desert shrublands, sagebrush, and pinyon-juniper woodland, below 5,500 ft (1676 m); flowers February-June. Distribution: s CA, s NV, s UT, AZ, NM, CO, s TX; south to n MEX. Notes: These spring annuals are distinguished by wooly pubescence all over and delicate purple bracteate flower clusters; and from the other Eriastrum by having smaller flowers (corolla 6-11 mm in E. diffusum vs. 12-20 mm in E. eremicum). Ethnobotany: Unknown, but others in the genus have medicinal uses. Etymology: Eriastrum is from Greek erion, for wool, and astrum, star, meaning woolly with starlike flowers; diffusum means diffuse, referring to the plant's branching pattern. Synonyms: Eriastrum diffusum subsp. jonesii Editor: SBuckley 2010, FSCoburn 2015, AHazelton 2015
Eriastrum diffusum
Open Interactive Map
Eriastrum diffusum image
Liz Makings
Eriastrum diffusum image
Max Licher
Eriastrum diffusum image
Frankie Coburn
Eriastrum diffusum image
Frankie Coburn
Eriastrum diffusum image
Anthony Mendoza
Eriastrum diffusum image
Patrick Alexander
Eriastrum diffusum image
Patrick Alexander
Eriastrum diffusum image
Patrick Alexander
Eriastrum diffusum image
Liz Makings
Eriastrum diffusum image
Patrick Alexander
Eriastrum diffusum image
Patrick Alexander
Eriastrum diffusum image
Zachery Berry
Eriastrum diffusum image
Anthony Mendoza
Eriastrum diffusum image
Eriastrum diffusum image
Liz Makings
Eriastrum diffusum image
Arizona State University Herbarium
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