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FNA | Family List | FNA Vol. 7 | Salicaceae | Salix

46. Salix chlorolepis Fernald, Rhodora. 7: 186. 1905.

Green-bract willow

Plants 0.15-0.2 m, not clonal. Stems erect; branches red-brown, (weakly glaucous), glabrous; branchlets yellow-brown, glabrous. Leaves: stipules absent or rudimentary; petiole (deeply to shallowly grooved adaxially), 1-3.5 mm; largest medial blade elliptic, oblanceolate, or obovate, 14-33 × 7-12 mm, 1.9-3.4 times as long as wide, base cuneate or convex, margins flat or slightly revolute, entire, ciliate, apex acute, convex, or rounded, abaxial surface glabrous, adaxial slightly glossy, glabrous; proximal blade margins entire; juvenile blade (sometimes reddish), glabrous, ciliate. Catkins: staminate 6.5 × 5-8 mm, flowering branchlet 1-3 mm; pistillate densely flowered, stout or subglobose, 7-12 × 3-6 mm, flowering branchlet 1.8-12 mm; floral bract tawny, brown, or greenish, 1-2.6 mm, apex broadly rounded to retuse, entire, abaxially glabrous. Staminate flowers: abaxial nectary 0.3-0.4 mm, adaxial nectary oblong, 0.5-0.8 mm, nectaries distinct; filaments distinct, glabrous; anthers ellipsoid, 0.4-0.6 mm. Pistillate flowers: adaxial nectary narrowly oblong, 0.9-1.6 mm, longer than stipe, nectaries distinct or connate and shallowly cup-shaped; stipe 0-0.4 mm; ovary pyriform, glabrous, beak abruptly tapering to or slightly bulged below styles; ovules 8-10 per ovary; styles connate to distinct 1/2 their lengths, 0.5-1.3 mm; stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, 0.3-0.6 mm. Capsules 3.6-6 mm. 2n = 38.

Flowering Jul-early Aug. Wet Sphagnum bog on alpine, serpentine barrens; of conservation concern; 1000-1200 m; Que.

Salix chlorolepis, known from Mt. Albert, is characterized by its general glabrousness. It seems to have a relationship with S. brachycarpa similar to that of S. raupii to S. glauca. Both may have originated through mutation or hybridization.


Salix chlorolepis forms natural hybrids with S. brachycarpa var. brachycarpa.

Salix chlorolepis × S. pedicellaris is a putative hybrid that has relatively small, glabrous leaves. Both parents occur together on Mt. Albert, Quebec.


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