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FNA | Family List | FNA Vol. 21 | Asteraceae | Brickellia

2. Brickellia atractyloides A. Gray, Proc. Amer. Acad. Arts. 8: 290. 1870.

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.

Varieties 3 (3 in the flora): sw United States, nw Mexico.

All three varieties of Brickellia atractyloides often intergrade and are not readily distinguished in some cases.

1 Phyllaries: outer broadly ovate   2a Brickellia atractyloides var. atractyloides
+ Phyllaries: outer lance-ovate to lance-linear   (2)
2 (1) Phyllaries, outer: margins ± entire   2b Brickellia atractyloides var. arguta
+ Phyllaries, outer: margins dentate   2c Brickellia atractyloides var. odontolepis


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