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Key to families | Table of families and genera
Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.
[Annual] perennial herb, subshrub [shrub], 20–50+ cm, pungently scented. Stem: erect, branched from base or throughout. Leaf: alternate to ± opposite [opposite], petioled or sessile; blades or lobes linear to oblanceolate or ovate, simple or 1-pinnately lobed, with ± bristle-tipped teeth, glabrous or ± minutely coarse-hairy to minutely scabrous, embedded oil-glands generally at bases of lobes or blade and near leaf tip. Inflorescence: heads generally radiate, 1, peduncled; bracts closely subtending head 12–22, linear to awl-shaped, sometimes 1–2-lobed, often bristle-tipped, generally with oil-glands; involucre bell-shaped to obconic [hemispheric], 7–20+ mm diam; phyllaries 12–20+ in ± 2 series, weakly fused 1/3–3/4 lengths, free in age, generally lanceolate to linear, persistent, margins of outer ± free to base, oil-glands on faces and near margins; receptacle convex, epaleate, ± pitted, margins of pits minutely fringed to bristly. Ray flower: (0)7–14; corolla yellow to orange or red-orange. Disk flower: 25–80[100+]; corolla yellow to yellow-orange, tube < cylindric throat, lobes lance-ovate to -linear; anther tip elliptic or ovate, acute; style tips linear, tapered, densely bristly. Fruit: obpyramidal [obconic], glabrous or ± strigose or silky-hairy, pappus of 8–20 scales in 1 series, each scale composed of 5–11 basally fused bristles.
10 species: southwestern United States, Mexico, Central America. (Greek: gland-leaf) [Strother 1986 Sida 11:371–378; Strother 2006 FNANM 21:237–239]
Unabridged disk flower: anther bases minutely sagittate.
1. Leaves generally not lobed, blades ovate to oblanceolate, toothed; disk flowers 50–80+; pappus of 15–20 scales ..... A. cooperi
1' Leaves 3–5 lobed, lobes linear to wedge-shaped or oblanceolate, ultimate margin entire or toothed; disk flowers 25–40; pappus of 8–12 scales ..... A. porophylloides
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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