Washington Flora Checklist

A Checklist of the Vascular Plants of Washington State
Hosted by the University of Washington Herbarium, Burke Museum

Checklist » Salicaceae » Salix exigua var. exigua

Salix exigua Nutt. var. exigua[FNA7, HC, HC2]

coyote willow, narrow-leaf willow

Publication: N. Amer. Sylv. 1: 75. 1842.

Origin: Native

Herbarium search: CPNWH

Notes: FNA7: "Variety exigua forms natural hybrids with var. hindsiana, Salix columbiana, S. interior, and S. melanopsis.

Variety exigua × var. hindsiana was reported by R. D. Dorn (1998). Inasmuch as the two varieties are subtly distinct, hybrids are difficult to recognize.

Variety exigua × Salix interior probably occurs throughout their area of overlap; it is known to me from Alberta and Nebraska, where there are plants with leaves indistinctly toothed and more silky than in S. interior. R. D. Dorn (1998) reported it from Alberta, British Columbia, Colorado, Montana, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming.

Variety exigua × Salix melanopsis is intermediate, with juvenile leaves densely hairy proximally, truncate floral bracts, and prominent stipules (R. D. Dorn 1998)."

Last updated 2/10/2024 by David Giblin.

Photo © Richard Old
(from WTU Image Collection)

Synonyms & Misapplied Names:

Salix argophylla Nutt.

Salix exigua Nutt. ssp. exigua[HC]

Salix exigua Nutt. var. luteosericea (Rydb.) C.K. Schneid.

Salix exigua Nutt. var. nevadensis (S. Watson) C.K. Schneid.

Salix exigua Nutt. var. stenophylla (Rydb.) C.K. Schneid.[HC]

Salix exigua Nutt. var. virens Rowlee

Salix fluviatilis Nutt. var. argophylla (Nutt.) Sarg.

Salix interior Rowlee var. luteosericea (Rydb.) C.K. Schneid.

Salix longifolia Muhl. var. argophylla (Nutt.) Andersson

Salix longifolia Lam. var. exigua (Nutt.) Bebb

Salix longifolia Muhl. var. opaca Andersson

Salix luteosericea Rydb.

Salix malacophylla Nutt. ex C.R. Ball

Salix nevadensis S. Watson

Salix stenophylla Rydb.