Antennaria dimorpha

(Nuttall) Torrey & A. Gray
Fl. N. Amer. 2: 431. 1843.
Common names: Low or two-form or cushion pussytoes
Endemic
Basionyms: Gnaphalium dimorphum Nuttall Trans. Amer. Philos. Soc., n. s. 7: 405. 1841
Synonyms: Antennaria dimorpha var. integra L. F. Henderson Antennaria dimorpha var. macrocephala D. C. Eaton Antennaria dimorpha var. nuttallii D. C. Eaton Antennaria latisquama Antennaria macrocephala
Treatment appears in FNA Volume 19. Treatment on page 398. Mentioned on page 389, 393, 399.

Dioecious. Plants 0.5–4 cm. Stolons none. Basal leaves: 1-nerved, linear to narrowly spatulate, 8–11 × 1–1.2 mm, tips acute, faces ± gray-tomentose. Cauline leaves linear or oblanceolate, 7–12 mm, not flagged (apices acute). Heads borne singly. Involucres: staminate 6–8 mm; pistillate 10–11 mm. Phyllaries distally dingy brown (apices acute-acuminate). Corollas: staminate 3–5 mm; pistillate 8–10 mm. Cypselae 2–3.5 mm, pubescent; pappi: staminate 4.5–6 mm; pistillate 10–12 mm. 2n = 28, 56.


Phenology: Flowering early–mid spring.
Habitat: Sagebrush steppe, plains, foothills of mountains
Elevation: 600–3400 m

Distribution

V19-633-distribution-map.gif

Alta., B.C., Sask., Calif., Colo., Idaho, Mont., Nebr., Nev., N.Mex., Oreg., Utah, Wash., Wyo.

Discussion

Antennaria dimorpha is characterized by narrowly oblanceolate leaves and relatively large heads (borne singly). It is, perhaps, the most xerophytic of spring-blooming Antennaria species. It belongs to the Dimorphae group.

Selected References

None.

Lower Taxa

None.

... more about "Antennaria dimorpha"
Randall J. Bayer +
(Nuttall) Torrey & A. Gray +
Gnaphalium dimorphum +
Low or two-form or cushion pussytoes +
Alta. +, B.C. +, Sask. +, Calif. +, Colo. +, Idaho +, Mont. +, Nebr. +, Nev. +, N.Mex. +, Oreg. +, Utah +, Wash. +  and Wyo. +
600–3400 m +
Sagebrush steppe, plains, foothills of mountains +
Flowering early–mid spring. +
Fl. N. Amer. +
Antennaria dimorpha var. integra +, Antennaria dimorpha var. macrocephala +, Antennaria dimorpha var. nuttallii +, Antennaria latisquama +  and Antennaria macrocephala +
Antennaria dimorpha +
Antennaria +
species +