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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 [perennial herb], 10--30(70+) cm; strongly scented. Stem: erect to decumbent, branched from base or throughout. Leaf: (1)2--3-pinnately divided, generally opposite, distal sometimes alternate, 1° lobes linear to linear-wedge-shaped, ultimate margins entire or toothed, puberulent, bristly or not at base, on lobe tips, or on teeth, oil-glands +- marginal. Inflorescence: heads radiate, 1 or in 2s or 3s [2° heads]; bracts subtending heads 1--9, 1/2--1 × phyllary length, +- linear, with oil-glands; involucre widely obconic to bell-shaped [hemispheric]; phyllaries 6--12 in +- 2 series, +- free, oval-oblanceolate, each with 1--7 round to elliptic oil-glands; receptacle convex, epaleate, +- pitted, pits minutely fringed to bristly. Ray Flower: generally 5--8; corolla yellow to orange. Disk Flower: 12--50[100+]; corolla yellow to orange, tube < cylindric throat, lobes deltate to lance-deltate; anther tip ovate to lanceolate; style tips acute to deltate. Fruit: obconic to obpyramidal, +- silky-hairy; pappus of 15--20 scales in +- 2 series, persistent, each scale composed of 5--10, basally fused, unequal bristles.
Species In Genus: 4 species: North America, Central America. Etymology: (Greek: a bad odor)
eFlora Treatment Author: Bruce G. Baldwin, adapted from Strother (2006)
Jepson Online Interchange
Previous taxon: Dittrichia viscosa
Next taxon: Dyssodia papposa
Citation for this treatment: Bruce G. Baldwin, adapted from Strother (2006) 2016. Dyssodia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=413, accessed on December 03, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on December 03, 2016.