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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus: Rigiopappus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Rigiopappus leptocladus A. Gray
Habit: Annual 5--30+ cm, taprooted; generally self-pollinated. Stem: generally erect, simple or with branches often exceeding main stem, minutely soft- to coarse-hairy, glabrous in age. Leaf: basal and at flower mostly cauline, alternate, +- sessile, mostly 9--30+ mm, 1--2(5+) mm wide, narrowly oblanceolate to lance-linear or linear, entire, glabrous or sparsely and minutely coarse-hairy, 1(3)-veined. Inflorescence: heads radiate, 1, at stem tips; peduncle often wiry, +- minutely coarse- to soft-hairy near heads; involucre 4--7+ mm, 1--3(5+) mm wide, +- cylindric to obconic; phyllaries 11--20+ in 2+ series, free, +- equal, linear to lanceolate or awl-shaped, green, minutely coarse-hairy, inner generally each +- enclosing a flower, margins scarious; receptacle +- flat, faintly pitted, paleae between ray and disk flowers (easily overlooked). Ray Flower: 3--13+ (generally 3, 5, or 8); corolla +- yellow, often red- or purple-tinged, tube 1.5--2+ mm, ray inconspicuous, 0.3--1 mm, narrowly elliptic. Disk Flower: 5--70+; corolla pale yellow, occasionally distally purple, tube 0.2--0.4 mm, throat 1--1.5 mm, lobes 2--4, 0.1--0.3 mm; anther tip thread-like; style tips long-tapering distally. Fruit: 4--5 mm, +- cylindric to spindle-shaped, barely or not compressed, minutely wrinkled, all minutely coarse-hairy or ray fruit +- glabrous in age; pappus generally of 3--5 awl-shaped scales, 1--4+ mm or in rays occasionally much reduced or 0, persistent. Chromosomes: 2n=18.
Ecology: Grassy sites, openings among shrubs or trees; Elevation: 100--2200 m. Bioregional Distribution: NW (exc NCo), CaR, SN, GV, CW, WTR, SnGb, MP; Distribution Outside California: to Washington, Idaho, Nevada. Flowering Time: Apr--Jul
eFlora Treatment Author: Bruce G. Baldwin, adapted from Strother (2006)
Jepson Online Interchange
Previous taxon: Rigiopappus
Next taxon: Rudbeckia
Citation for this treatment: Bruce G. Baldwin, adapted from Strother (2006) 2016. Rigiopappus leptocladus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=4579, accessed on April 29, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on April 29, 2016.