Gnaphalium exilifolium

A. Nelson

Bull. Torrey Bot. Club 29: 406. 1902.

Common names: Slender cudweed
Basionym: Gnaphalium angustifolium A. Nelson Bull. Torrey Bot. Club 26: 357. 1899, Gnaphalium strictum A. Gray 1857
Synonyms: Gnaphalium grayi A. Nelson & J. F. Macbride
Treatment appears in FNA Volume 19. Treatment on page 430. Mentioned on page 429.

Annuals, 3–15(–25) cm; taprooted or fibrous-rooted. Stems commonly branched from bases, erect to ascending, tomentose. Leaf blades linear, 0.4–5 cm × 0.5–3 mm. Bracts subtending heads linear, 10–25 × 0.5–1 mm, surpassing glomerules. Heads in spiciform glomerules (along distal 1/3–2/3 of main stems, sometimes appearing loosely spiciform). Involucres 2.5–3.5 mm. Phyllaries brownish, bases woolly, inner narrowly triangular with whitish, acute apices. 2n = 14.

Phenology: Flowering Jul–Oct.
Habitat: Lake and pond margins, streamsides, seeps, moist meadows
Elevation: 1400–3000 m



Ariz., Colo., N.Mex., S.Dak., Utah, Wyo., Mexico (Chihuahua).


Gnaphalium exilifolium, a New World native, differs from the Old World G. uliginosum chiefly in its linear, slightly longer cauline leaves and bracts and in its spiciform arrangement of heads. Pistillate corollas of G. exilifolium are sometimes red-tipped. Cypselae of both taxa are variably smooth to papillate; local populations apparently are consistent in this feature; the variation is otherwise geographically inconsistent.

Selected References


Lower Taxa

... more about "Gnaphalium exilifolium"
Guy L. Nesom +
A. Nelson +
Gnaphalium angustifolium +  and Gnaphalium strictum +
Slender cudweed +
Ariz. +, Colo. +, N.Mex. +, S.Dak. +, Utah +, Wyo. +  and Mexico (Chihuahua). +
1400–3000 m +
Lake and pond margins, streamsides, seeps, moist meadows +
Flowering Jul–Oct. +
Bull. Torrey Bot. Club +
Gnaphalium grayi +
Gnaphalium exilifolium +
Gnaphalium +
species +