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|Jepson eFlora: Taxon page
Key to families | Table of families and genera
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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus: Amphipappus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Amphipappus fremontii Torr. & A. Gray
Habit: Shrub, generally < 6 dm, glabrous or herbage minutely stiff-hairy. Stem: much-branched, widely spreading to ascending, striate, smooth, white distally, +- gray proximally; leafless stems thorny. Leaf: alternate, short-petioled, generally < 2 cm, obovate or elliptic, entire, sometimes +- thick, light yellow- or gray-green. Inflorescence: heads radiate, in groups of 2--4, crowded in flat-topped cyme-like clusters generally 3--5 cm wide; involucres obconic-cylindric, +- 5 mm, < 3 mm wide; phyllaries 7--12, ovate, +- white or pale green; receptacle flat, pitted, epaleate. Ray Flower: 1--2; ray barely exceeding involucre, 2- or 3-toothed, yellow. Disk Flower: 3--7, staminate; corolla narrowly funnel-shaped, sinuses deep, lobes reflexed, style-branch appendages lanceolate to rounded. Fruit: ray fruit <= 3 mm, hairy; pappus of 15--20 stout bristles fused at base, generally 1 mm; ovary of disk flower <= 1 mm, glabrous; pappus of 25 flattened, twisted bristle-like scales generally <= 3 mm.
Note: Varieties not known to intergrade. Phylogenetic studies by Roberts & Urbatsch 2004 Syst Bot 29:199--215, suggest that Amphipappus and some other small genera should be merged into Chrysothamnus.
eFlora Treatment Author: David J. Keil & Meredith A. Lane
Jepson Online Interchange
Key to Amphipappus fremontiiPrevious taxon: Amphipappus
Next taxon: Amphipappus fremontii var. fremontii
Citation for this treatment: David J. Keil & Meredith A. Lane 2017. Amphipappus fremontii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=842, accessed on February 25, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 25, 2017.