Difference between revisions of "Townsendia annua"
Contr. Gray Herb. 183: 132, plate 22, fig. 4. 1957.
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Latest revision as of 21:48, 29 July 2020
Annuals, 3–12 (–16+) cm. Stems decumbent to erect; internodes (1–) 3–12 (–18+) mm, strigose. Leaves mostly cauline, blades spatulate to narrowly oblanceolate, 8–12 (–25+) × 1–3 (–5+) mm, not fleshy, faces ± strigillose. Heads at tips of stems. Involucres ± hemispheric, 8–12 (–16) mm diam. Phyllaries 26–30+ in 3+ series, the longer ± lanceovate to oblanceolate, 5–6+ mm (l/w = 2.5–5), apices acute, abaxial faces strigillose to glabrate. Ray-florets 12–30+; corollas white or pinkish to lavender adaxially, laminae 5–8+ mm, glabrous abaxially. Disc-florets 60–120+; corollas 2.5–3.5+ mm. Cypselae 2–3 mm, faces hairy, hair tips glochidiform; pappi persistent; on ray cypselae ± 10 lanceolate scales 0.2–0.5 (–1) mm; on disc cypselae 20+ subulate scales 1–2.5 (–4) mm. 2n = 18.
Phenology: Flowering Apr–Jun(–Oct).
Habitat: Sandy soils, alkaline flats, red clays
Elevation: 1200–2100 m
Distribution
![V20-433-distribution-map.gif](/w/images/c/c1/V20-433-distribution-map.gif)
Ariz., Colo., N.Mex., Tex., Utah, Wyo.
Discussion
The type of Townsendia annua may prove to be conspecific with that of T. strigosa.
Selected References
None.
Lower Taxa
"broader" is not a number.