|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Perennial herb from taproot, rhizome, or caudex. Stem: 1--many from base, variously branched, generally erect, ribbed, strigose or rough-hairy. Leaf: basal and cauline, alternate, petioled, blade linear to ovate in outline, generally pinnately 1--2 × divided, the basal and distal-most sometimes entire; faces strigose to rough-hairy, gland-dotted. Inflorescence: heads radiate, 1 or in open, few-headed clusters; peduncle slender, bracts 0--few; involucre rotate; phyllaries in 2 unequal series, linear or narrowly triangular, spreading in flower, reflexed in fruit, outer generally longer; receptacle +- spheric to columnar, paleate; palea ovate, folded around fruit, tip hair-tufted, margins each with oblong resin gland. Ray Flower: 3--15+, sterile; corolla yellow, maroon, or 2-colored yellow and maroon; ray oblong to widely obovate. Disk Flower: 50--400+; corolla yellow-green or distally +- purple; anthers generally brown-purple; style tips triangular, long papillate. Fruit: oblanceolate, +- 4-angled, compressed side-to-side, winged, ciliate on abaxial margin; pappus 0 or 1--2 tooth-like projections or a low crown.
Species In Genus: 7 species: North America. Etymology: (Dacian name for a sp. of Aster)
eFlora Treatment Author: David J. Keil
Jepson Online Interchange
Previous taxon: Raillardella scaposa
Next taxon: Ratibida columnifera
Citation for this treatment: David J. Keil 2017. Ratibida, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=586, accessed on February 23, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 23, 2017.