Difference between revisions of "Brickellia atractyloides"
Proc. Amer. Acad. Arts 8: 290. 1870.
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Revision as of 21:09, 5 November 2020
Shrubs, 20–50 cm. Stems densely branched, glandular-puberulent. Leaves opposite or alternate; petioles 0–3 mm; blades 3–4-nerved from bases (veins prominent), deltate, lanceolate, or ovate, 10–50 × 5–25 mm, bases acute to truncate or cordate, margins usually sharply dentate or dentate-serrate, rarely entire, apices acute to acuminate, faces glabrous or strigose and minutely glandular-puberulent. Heads in open, paniculiform arrays. Peduncles 10–70 mm, hispid to hispidulous and stipitate-glandular. Involucres cylindric to broadly campanulate, 9–15 mm. Phyllaries 24–33 in 3–4 series, green, 3–16-striate, subequal or unequal, margins narrowly scarious (apices acute to acuminate); outer (often bright green, 4–16-striate) lance-linear, linear-ovate, or broadly ovate, inner (pale green, 3–4-striate) linear or narrowly lanceolate (often chartaceous, scabrellous, often glandular). Florets 40–90; corollas pale yellow-green or cream, often purple-tinged, 6–8 mm. Cypselae 3–5.5 mm, scabrellous; pappi of 18–25 smooth or barbellulate bristles.
Distribution
Ariz., Calif., Colo., Nev., Utah, nw Mexico.
Discussion
Varieties 3 (3 in the flora).
All three varieties of Brickellia atractyloides often intergrade and are not readily distinguished in some cases.
Selected References
None.
Lower Taxa
Key
| 1 | Phyllaries: outer broadly ovate | Brickellia atractyloides var. atractyloides |
| 1 | Phyllaries: outer lance-ovate to lance-linear | > 2 |
| 2 | Phyllaries, outer: margins ± entire | Brickellia atractyloides var. arguta |
| 2 | Phyllaries, outer: margins dentate | Brickellia atractyloides var. odontolepis |