Difference between revisions of "Brickellia parvula"
Smithsonian Contr. Knowl. 3(5): 84. 1852.
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|tribe=Asteraceae tribe Eupatorieae | |tribe=Asteraceae tribe Eupatorieae | ||
|genus=Brickellia | |genus=Brickellia | ||
Revision as of 15:31, 18 September 2019
Perennials, 12–30 cm (caudices woody). Stems branched, pubescent. Leaves opposite; petioles 0–1 mm; blades 3-nerved from bases, deltate-ovate to lanceolate, 7–30 × 4–28 mm, bases mostly obtuse to subtruncate, sometimes acuminate, margins serrate, apices acute, faces puberulent, gland-dotted. Heads borne singly or in corymbiform-paniculiform arrays. Peduncles 10–30 mm, puberulent. Involucres cylindric to campanulate, 8–12 mm. Phyllaries 12–15 in 3–5 series, greenish, often purple-tinged, 5–7-striate, unequal, margins scarious (apices acute); outer ovate to lance-ovate (puberulent, margins ciliate), inner narrowly lanceolate (glabrous). Florets 8–14; corollas pale green or yellow, 5.5–6.5 mm. Cypselae 4.5–5 mm, densely pubescent; pappi of 24–30 white, usually barbellate, sometimes subplumose, bristles. 2n = 18.
Phenology: Flowering Aug–Oct.
Habitat: Limestone or granitic cliffs
Elevation: 1500–2500 m
Distribution
Ariz., N.Mex., Tex.
Discussion
Selected References
None.