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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: Annual 0.5--14 cm, +- green to +- gray, cobwebby or tomentose. Stem: 0, or 1, erect, or 2--10, ascending to prostrate, +- forked, +- leafless between distal forks. Leaf: basal and/or cauline, +- alternate, +- sessile or petioled, linear-oblanceolate to spoon-shaped, entire; distal leaves subtending heads, crowded, largest > proximal leaves (sometimes +- grading into paleae in Ancistrocarphus keilii). Inflorescence: heads disciform, sessile, 1 or 2--5 per group; involucre 0, simulated by paleae or leaves, or involucre +- cup-like, then phyllaries 3--6, +- equal, round, << paleae, membranous, persistent, sometimes vestigial; receptacle length 1--2 × width, mushroom- or hourglass-shaped, glabrous; paleae of pistillate flowers each enclosing a flower, +- persistent with fruit, +- boat-shaped, +- acute, woolly abaxially, prominently 3-veined or middle vein obscure, margin reflexed distally as a scarious wing, wing terminal, erect to curved inward, hidden or visible in head; paleae of disk flowers generally 5, +- enlarged, spreading proximally, hooked or curved inward distally, open, concave, +- lanceolate or +- obovate, acuminate or abruptly papery-pointed, cartilaginous, +- green, tomentose. Pistillate Flower: 5--11, each subtended by a palea; corolla obscure, narrowly cylindric. Disk Flower: 3--6, staminate; pappus 0; corolla 4--5(6)-lobed; anther base tailed, tip +- triangular; style tips +- linear-oblong. Fruit: each enclosed by a palea, obovoid, compressed front-to-back, smooth, dull, corolla scar terminal; pappus 0.
Species In Genus: 2 species: western North America. Etymology: (Greek: fishhook chaff) Note: Closely related to Hesperevax.
eFlora Treatment Author: James D. Morefield
Jepson Online Interchange
Key to AncistrocarphusPrevious taxon: Anaphalis margaritacea
Next taxon: Ancistrocarphus filagineus
Citation for this treatment: James D. Morefield 2016. Ancistrocarphus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=311, accessed on July 27, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on July 27, 2016.