Salix humboldtiana
Salix gooddingii
Humboldt's willow
Goodding's black willow, Goodding's willow, Gooding's willow
stipules broad rudiments or foliaceous on early ones, foliaceous on late ones, (glands numerous adaxially), apex rounded to convex;
petiole (sometimes with spherical glands distally), 4–10 mm, pilose adaxially;
largest medial blade (sometimes amphistomatous), narrowly elliptic, very broadly oblong, lorate, or linear, 67–130 × 9.5–16 mm, 4.7–12.4 times as long as wide, base cuneate to convex, margins serrulate to serrate, apex acuminate, caudate, or acute, abaxial surface (usually not glaucous, rarely thinly so), glabrous or puberulent, hairs wavy, adaxial slightly glossy, pilose to glabrescent;
proximal blade margins entire or shallowly serrulate;
juvenile blade sparsely velvety to pilose abaxially, hairs white.
abaxial nectary (0.2–)0.3–0.6 mm, adaxial nectary square to ovate, 0.2–0.6 mm, nectaries distinct;
stamens 4–6(–8);
filaments (sometimes basally connate), hairy on proximal 1/2;
anthers 0.4–0.5 mm, (axes straight).
adaxial nectary square (flattened), 0.2–0.6 mm;
stipe 1.2–3.2 mm;
ovary pyriform, (sometimes villous), beak slightly bulged or abruptly tapering to styles;
ovules 12–18 per ovary;
styles 0.1–0.3 mm;
stigmas 0.2–0.29–0.32 mm.
6–7 mm.
humboldtiana Willdenow: Humboldt willow is not known to occur in the flora area.
is characterized by: trees, 4–25 m;
branches highly brittle at base, bud-scale margins distinct and overlapping adaxially;
stipules on late leaves rudimentary or foliaceous;
largest medial leaf blade usually linear, abaxial surface not glaucous, adaxial dull; pistillate bract deciduous after flowering;
stamens 3–7;
capsules with distinct, often raised, white veins.;
it occurs throughout much of Mexico to central Chile.
staminate 19–80 × 6–10 mm, flowering branchlet 2–23 mm; pistillate 23–82 × 6–15 mm, flowering branchlet 2–48 mm;
floral bract 1.4–2.4 mm, apex acute or rounded, entire or toothed, abaxially sparsely to moderately densely hairy, hairs wavy; pistillate bract deciduous after flowering.
= 38.
Salix humboldtiana
Salix gooddingii
Salix humboldtiana is closely related to S. nigra in its generally narrow leaf blades, which are not glaucous abaxially. The two differ in the following characters: S. humboldtiana has leaf blades linear to sometimes narrowly oblong (10–28.6 times as long as wide), ovaries usually ovoid to ellipsoid, ovary walls often stomatiferous and with raised, white veins, and capsule valves relatively thick, slightly recurved. S. nigra has leaf blades usually narrowly lanceolate (6–13 times as long as wide), ovaries pyriform to obclavate, ovary walls neither stomatiferous nor notably veined, and capsule valves relatively thin and strongly recurved. Both species occur in Chihuahua, Mexico.
The report by R. I. Lonard et al. (1991) that specimens identified as Salix nigra from the lower Rio Grande, Texas, resemble S. humboldtiana in having strongly veined capsules suggests that S. humboldtiana, or intergrades with that species, may occur in Texas. Attempts to locate a voucher specimen were unsuccessful; because strongly veined capsules are diagnostic, further field study is indicated.
An earlier name, Salix chilensis Molina, has been applied to this species; it does not seem to pertain to this taxon (C. K. Schneider 1918).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Salix gooddingii and S. nigra are closely related and are sometimes treated as conspecific (C. R. Ball 1950). Salix gooddingii has yellow-brown or pale gray-brown branches, capsules 6–7 mm, and ovaries usually glabrous but pilose in ca. 20% of specimens. Salix nigra has red-brown to dark gray-brown branches, capsules 3–5 mm, and ovaries almost always glabrous. A single plant with pilose ovaries was found in Ontario, Canada; reports (W. A. Archer 1965) of S. nigra with hairy ovaries in Alabama, Arkansas, Illinois, Iowa, Kansas, Massachusetts, Oklahoma, and Texas could not be confirmed. Ranges of these taxa overlap in west-central Texas, where there is evidence of intergradation; they rarely occur in the same population. The map by E. L. Little Jr. (1971), who treated them as conspecific, shows a significant range disjunction between the two.
Catkins of Salix gooddingii flowering in March and early April are sometimes borne in leaf axils. This suggests that the sylleptic condition, typical of S. bonplandiana, is sometimes ecotypic.
Hybrids:
Salix gooddingii forms natural hybrids with S. amygdaloides and S. nigra. Hybrids with S. lasiandra have been reported (C. K. Schneider 1921); no convincing specimens have been seen.
Salix gooddingii × S. laevigata: In Arizona, a population of young plants displays intermediate characteristics. They have leaf blades sparsely glaucous abaxially, as in S. laevigata, but narrow, often amphistomatous, and with petioles sometimes not glandular distally, as in S. gooddingii. Both parental species occur in the region. This hybrid was also reported by C. K. Schneider (1921) from California.
Salix gooddingii × S. nigra: This hybrid may occur in western Texas where the parental species overlap. Some specimens from that area seem to be “intermediate” in branch color, but the differences are subtle.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
WildflowerSearch
iNaturalist
USDA Plants Database
CA
