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|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Subshrub, appearing glabrous. Stem: decumbent to erect, striate; old stems gray, bark sometimes shreddy with age; young stem proximally white, distally green. Leaf: simple, proximally sometimes in axillary clusters, spreading-ascending to appressed-erect, linear to oblong or narrowly oblanceolate, generally minutely stiff-pointed, pale green to light gray-green. Inflorescence: heads radiate or discoid, 1 or in rounded to +- flat-topped clusters, small in bud, expanding rapidly in fruit; involucre widely bell-shaped to +- spheric; phyllaries 20--24, graduated in 2--3 series, ovate to ovate-elliptic, bases cream-yellow, tips green, margins scarious; receptacle deeply pitted, with projections between flowers, epaleate. Ray Flower: present or 0; corolla yellow. Disk Flower: 14--80; corolla funnel-shaped, yellow, sinuses deep, lobes spreading to reflexed; anther tip acute; style tips lanceolate. Fruit: densely long-hairy, hairs white, bronze, or +- brown; pappus of 20--25 wide, stiff, wide-spreading bristle-like scales, slightly > fruit.
Species In Genus: 2 species: southwestern United States. Etymology: (Greek: unbending pappus)
eFlora Treatment Author: Guy L. Nesom & Meredith A. Lane
Jepson Online Interchange
Key to AcamptopappusPrevious taxon: Asteraceae (Compositae)
Next taxon: Acamptopappus shockleyi
Citation for this treatment: Guy L. Nesom & Meredith A. Lane 2017. Acamptopappus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=290, accessed on January 23, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on January 23, 2017.