Bailey & Bailey: Woody Plants of National Parks 47 



vicinity of Rustic Falls; Tower Falls; Old Faithful. GRAND TETON: southeastern park 

 boundary near Moose. ROCKY MOUNTAIN, common. ZION. GRAND CANYON, on the 

 North Rim: Point Imperial. 



15. Interocean Bog Willow (Salix pedicellaris Pursh var. hypoglauca 

 Feinald) .—Shrubs 3 to 6 feet high; leaves oblong-elliptic to reverse-egg- 

 shaped, rather blunt-pointed, tapered to the base, 1/2 to I1/2 inches long, 

 smooth, firm when mature, not toothed, finely veined; catkins appearing with 

 the leaves, borne on leafy stalks, loosely few-flowered; scales greenish-yellow, 

 sometimes colored at the tips, persistent; stamens 2, the filaments smooth 

 and distinct; capsules smooth, on stalks 2 to 3 mm. long; styles very short or 

 none. This is a shrub of sphagnum bogs and wet meadows. 



OccuTTence. — ISLE ROYALE : Scoville Point; Raspberry Island. 



16. Slender Willow {Salix petiolaris Sm.). — Shrub 3 to 12 feet high 

 with slender purplish twigs; leaves narrowly lance-shaped, taper-pointed, % to 

 3 inches long, finely toothed, dark green and shining above, whitish below, at 

 first slightly silky, becoming smooth; catkins appearing before or with the 

 leaves, naked or sometimes with a few leafy bracts at base; scales pale brown 

 or yellowish, persistent, white-hairy; stamens 2, the filaments smooth and dis- 

 tinct; capsules finely hairy, borne on stalks 2 to 3 mm. long, the styles 

 short or none. 



Occurrence. — ROCKY MOUNTAIN, 7,500 feet. 



17. Grayleaf Willow (Salix pseudolapponum v. Seem.). — Low shrub 

 1 to 5 feet high, fonning clumps; leaves elliptic to reverse-lance-shaped, 1^4 

 to 2 inches long, dull green above, whitish below, hairy on both sides, not 

 toothed or scarcely so; catkins appearing after the leaves, leafy-bracted at 

 base; scales yellowish or dark at tips; stamens 2, the filaments smooth or 

 finely hairy at base; capsules gray-woolly, borne on stalks 1 mm. long; styles 

 1 mm. or more long. (Syns. S. glaucops Anderss, as to our area, S. glauca 

 var. glabrescens Schn.). 



Occurrence. — glacier, frequent in meadows above timberline: Swiftcurrent Creek 

 below Swiftcurrent Lake. YELLOWSTONE: Mount Washburn, 9,000 feet. ROCKY MOUN- 

 TAIN, 7,500 to 11,500 feet: Trail Ridge; Poudre Lakes. 



18. Grayleaf Sierra Willow (Salix orestera Schn.). — Shrub 2 to 5 

 feet high with many stems from the base; leaves narrowly elliptic to lance- 

 shaped, 1 to 2y^ inches long, green above, whitish below, silky-hairy on both 

 sides, not toothed or scarcely so; catkins appearing with the leaves, on short 

 leafy stalks, or not stalked; scales dark, hairy; stamens 2, the filaments smooth; 

 capsules finely silky-hairy, stalked, the styles long. (Syn. S. glauca L. var. 

 orestera Jepson and var. villosa Jepson). 



Occurrence. — CRATER LAKE, common: Annie Spring, near park headquarters. YO- 

 SEMITE, 8,000 to 11,000 feet: North Fork Merced River; above Fletcher Lake; Dono- 

 hue Pass; Tioga Pass; Smedberg Lake; Matterhorn Canyon; Moraine Meadows; 

 Grouse Lake; Tioga road; Tuolumne Meadows. KINGS CANYON, 7,500 to 10,000 feet: 

 East Lake; Harrison Pass trail. SEQUOIA, 8,000 to 10,000 feet: Alta Meadows; north- 

 east of Pear Lake; south shore of Twin Lakes; Crabtree Meadows; Farewell Gap. 



