Cottsia gracilis

(A. Gray) W. R. Anderson & C. Davis

Contr. Univ. Michigan Herb. 25: 163. 2007.

Basionym: Janusia gracilis A. Gray Smithsonian Contr. Knowl. 3(5): 37. 1852
Treatment appears in FNA Volume 12. Treatment on page 363.
Please click on the illustration for a higher resolution version.
Illustrator: Karin Douthit

Copyright: University of Michigan

Leaf blades very narrowly lanceolate or elliptic, larger blades 12–40(–50) × (1.5–)3–7(–9) mm, length 4–10 times width, base cuneate or rounded, apex acute, obtuse, or occasionally rounded, margins very often bearing few to many cilia or toothlike projections distally, surfaces persistently sericeous or sometimes glabrescent. Pedicels 4–8 mm, 0.7–1.8 times as long as peduncles. Samaras 9–15(–17) mm, nut 1.5–2.5 × 3–4.5 mm. 2n = 40 (Mexico).

Phenology: Flowering and fruiting Mar–Oct(–Jan).
Habitat: Open rocky slopes and deserts.
Elevation: 300–1600(–2100) m.


V12 1015-distribution-map.jpg

Ariz., N.Mex., Tex., Mexico (Baja California, Baja California Sur, Chihuahua, Durango, Nuevo León, Sonora, Zacatecas).


Cottsia gracilis is widespread in Arizona, absent only from the northeastern part of the state, but otherwise in the flora area is restricted to southern New Mexico and trans-Pecos Texas.

Selected References


Lower Taxa

... more about "Cottsia gracilis"
William R. Anderson† +
(A. Gray) W. R. Anderson & C. Davis +
Janusia gracilis +
Ariz. +, N.Mex. +, Tex. +, Mexico (Baja California +, Baja California Sur +, Chihuahua +, Durango +, Nuevo León +, Sonora +  and Zacatecas). +
300–1600(–2100) m. +
Open rocky slopes and deserts. +
Flowering and fruiting Mar–Oct(–Jan). +
Contr. Univ. Michigan Herb. +
Illustrated +
Cottsia gracilis +
species +