Difference between revisions of "Tetradymia spinosa"
Bot. Beechey Voy., 360. 1839.
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name=Tetradymia spinosa | name=Tetradymia spinosa | ||
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|authority=Hooker & Arnott | |authority=Hooker & Arnott | ||
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|publication year=1839 | |publication year=1839 | ||
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|tribe=Asteraceae tribe Senecioneae | |tribe=Asteraceae tribe Senecioneae | ||
|genus=Tetradymia | |genus=Tetradymia | ||
Revision as of 20:26, 16 December 2019
Shrubs, 10–100 cm. Stems 1–5+, erect or spreading, spiny, evenly pannose. Leaves: primaries forming recurved spines, 5–25 mm; secondaries linear-filiform to spatulate, 3–25 (× 1–2) mm, glabrous or glabrescent. Heads 1–2 (in axils of spines). Peduncles 5–30 mm. Involucres hemispheric, 8–12 mm. Phyllaries 4–6, oblong to ovate. Florets 5–8; corollas pale to bright yellow, 6–10 mm. Cypselae 6–8 mm, copiously pilose (hairs 9–12 mm); pappi of ca. 25, subulate scales 6–9 mm. 2n = 60.
Phenology: Flowering spring.
Habitat: Usually sandy soils of alkali sinks, shadscale scrub, pinyon-juniper woodlands
Elevation: 800–2400 m
Distribution
Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah., Wyo.
Discussion
Selected References
None.
Lower Taxa
None.