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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 3–12(30) cm, taprooted. Stem: generally 1, erect, generally branched ± throughout. Leaf: basal and cauline, alternate, mostly sessile; blade linear or pinnately divided into 2–15 linear lobes, ultimate margins entire; faces glabrous or sparsely woolly-tomentose. Inflorescence: heads radiate, 1; involucre ± hemispheric, 3–6 mm diam; phyllaries 5–13+ in ± 2 series, basally fused, ± erect, curved inward in late flower, reflexed in fruit, elliptic to ovate, ± equal, ± membranous, veiny, tips generally purple; receptacle flat to convex, smooth or pitted, epaleate. Ray flower: 5–13+; ray sessile, linear to ovate, generally yellow (white), often ± purple abaxially; some pistillate flowers sometimes lack corollas. Disk flower: 20–60(100+), staminate; corolla ± 2–3 mm, generally not exceeding involucre, yellow, tube < to > bell-shaped throat, lobes ± erect, deltate to lanceolate; anther tip concave; style undivided, tip head-like, white. Fruit: ± ellipsoid, generally 5–6(10)-ribbed or -angled, generally papillate and, if so, sticky when wet; pappus 0.
3 species: California, Chile. (Greek: mucus-seed, the fruit becoming slimy when wetted) [Strother 2006 FNANM 20:640–641]
Unabridged references: [Ornduff 1964 Brittonia 16:289–295; Wagstaff et al. 2006 Taxon 55:95–106]
1. Stigma of ray flower red; proximal leaves unlobed or 2–3(5)-lobed ..... B. bakeri
1' Stigma of ray flower yellow; proximal leaves generally 5–15-lobed ..... B. nanum
2. Fruit generally 2.5–3 mm; disk flowers generally 12–60(70+); pollen generally white; widespread, generally more inland in northern California ..... var. nanum
2' Fruit generally 3–4.5 mm; disk flowers generally 60–100+; pollen generally yellow; c North Coast (Mendocino Co.), n Central Coast ..... var. robustum
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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