A. Gray

Smithsonian Contr. Knowl. 5(6): 85. 1853.

Etymology: No etymology in protologue evidently alluding to similarities to members of genus Parthenium
Treatment appears in FNA Volume 21. Treatment on page 23. Mentioned on page 8, 9.

Annuals, 20–200 cm. Stems erect. Leaves cauline; alternate; petiolate; blades (3-nerved) deltate to ovate, margins entire or toothed, faces usually softly pubescent, sometimes rough-hairy. Heads obscurely radiate or disciform, borne in loose, paniculiform arrays. Involucres hemispheric, 3–5 mm. Phyllaries persistent (outer) or falling, 13, distinct, outer 5 herbaceous (becoming reflexed), inner 6–8 membranous (each becoming cupped around a cypsela). Receptacles convex; paleae of 2 kinds: peripheral purplish-mottled, becoming somewhat fleshy and arcuate-clavate, shed together in pairs with each cypsela; inner 0 or narrowly conic, persistent. Ray florets 6–8; corollas yellowish (minute), glandular. Disc florets 10–25+, functionally staminate; corollas yellowish, funnelform, distally glandular and hairy (anthers ± connate). Cypselae (ray) strongly obcompressed to obflattened, obovate, tuberculate, shed with 2 adjacent, ± fleshy paleae; pappi 0 or rudimentary. x = 18.


Ariz., nw Mexico.


Species 1.

Lower Taxa

... more about "Parthenice"
John L. Strother +
A. Gray +
Ariz. +  and nw Mexico. +
No etymology in protologue +  and evidently alluding to similarities to members of genus Parthenium +
Smithsonian Contr. Knowl. +
sauck1975a +
Undefined (tribe Undefined) subtribe Ambrosieae +  and Undefined (tribe Undefined) subtribe Iveae +
Parthenice +
Asteraceae (tribe Heliantheae) subtribe Ambrosiinae +