48 American Midland Naturalist Monograph No. 4 



19. Wolfs Willow (Saltx Wolfl Bebb).— Small shrub 1 to 2 feet 

 high, forming clumps; branchlets chestnut-brown to yellow, lustrous; leaves 

 small, about 1 inch or less long, reverse-lance-shaped, more or less silvery- 

 hairy on both sides, or becoming smooth, the margins not toothed; catkins 

 small, roundish, less than 1/2 inch long, borne on short leafy stalks; scales 

 dark, thinly long-hairy; stamens 2. 



Occurrence. — ROCKY mountain, common in wet meadows, 9,000 to 11,000 feet: 

 Grand Lake region. 



19a. Idaho Willow (var. idahoensis Ball). — Shrubs larger, 3 to 6 



feet high; leaves larger, 1 to 2 inches long; catkins mostly i/^ to nearly 1 inch 



long; capsules finely hairy, the styles about 1 mm. long. 



Occurrence. — Yellowstone, abundant: south end of Specimen Ridge; meadow 

 above Fishing Bridge; Yellowstone Lake; Tower Falls; Swan Lake. GRAND TETON: 

 Surprise Lake; Indian Paint Brush Canyon. 



20. Eastwood Willow {Salix Eastwoodiae Ckl.). — Shrub 2 to 6 feet 

 high, often forming thickets along water courses and about meadows; branch- 

 lets usually dark brown, finely hairy; leaves elliptic to narrowly reverse-egg- 

 shaped, grayish-long-hairy on both sides or becoming nearly smooth in age, 

 the margins very finely gland-toothed; catkins appearing with the leaves, 

 borne on short leafy stalks, the staminate % to 1 inch long, those bearing cap- 

 sules % to 1% inches long; scales brown, hairy; stamens 2, the filaments hairy 

 ai; base; capsule hairy, the styles about 1 mm. long. (Syn. S. calijornica 

 Bebb.). 



OccurTcnce. — crater lake: Castlecrest Garden; Munson Valley; park headquar- 

 ters. YOSEMITE, 7,500 to 10,000 feet: upper Gaylor Lake; Tuolumne Meadows; west 

 of Tenaya Lake; Slide Canyon, Piute Creek; Peregoy Meadows; Snow Flat; Cres- 

 cent Lake. KINGS CANYON, 7,000 ot 9,500 feet: East Lake. SEQUOIA: Giant Forest, 

 6,500 feet. 



21. Mountain Willow {Salix commutata Bebb). — Low shrub 3 to 5 

 feet high, found along streams and about mountain meadows; leaves elliptic to 

 reverse-egg-shaped, grayish on both sides with long hairs or sometimes nearly 

 smooth in age, % to 1^/2 inches long, the margins not toothed or with fine 

 glandular teeth; catkins borne on short leafy stalks, appearing wzth the leaves; 

 scales brown; stamens 2, the filaments free, not hairy; capsules smooth or very 

 finely woolly, the styles 1 to 1^/2 mm. long. 



Occurrence. — OLYMPIC, 4,000 to 5,000 feet: Martin's Park southeast of Low Divide; 

 Dose Meadows; Marmot Pass; Queets River valley. MOUNT RAINIER, 4,000 to 6,000 

 feet: Paradise Valley. GLACIER, common, 6,000 to 7,500 feet: Swiftcurrent Pass; Ice- 

 berg Lake; Blackfoot Glacier; Logan Pass; Gunsight Lake. 



22. Barratt Willow {Salix Barrattiana Hook.). — Small shrub I1/2 to 

 4 feet high; leaves elliptic-lance-shaped to reverse-lance-shaped, pointed at the 

 tip, pointed to somewhat heart-shaped at base, 1^2 to 3 1/2 inches long, not 

 toothed or with a few glandular teeth, gray-woolly on both sides; capsules 

 densely hairy; styles I1/2 to 21/2 mm. long. 



Occurrence. — GLACIER, rare ; Gunsight Pass on rock slide. 



