52 American Midland Naturalist Monograph No. 4 



the forest and frequently becoming abundant in burned areas; leaves reverse- 

 egg-shaped to reverse-lance-shaped, rounded or abruptly pointed at the tips, 

 I1/4 to 4 inches long, green above, pale to whitish or silky-hairy below, the 

 margins not toothed or scarcely so; catkins oblong to elliptic, I/2 to 1 inch 

 long, appearing before the leaves, stout; scales black, hairy; stamens 2, long- 

 exserted, the filaments smooth; capsules finely white-hairy, the styles none. 

 (Syn. S. Nuttalli Sarg.) 



Occurrence. — OLYMPIC, abundant: Elwha River; Enchanted Valley above the 

 chalet; Seven Lakes Basin. MOUNT RAINIER, abundant, 2,000 to 5,000 feet. CRATER 

 LAKE. YOSEMITE, 5,000 to 7,000 feet: Glacier Point; Wawona. KINGS CANYON: 

 Junction Meadow and below. SEQUOIA 7,000 to 9,000 feet: south end of Crescent 

 Meadow; Cliff Creek; Mineral King; below Twin Lakes. GLACIER, abundant, 3,000 

 to 5,000 feet: Belton; flats below Lake McDonald; Going-to-the-Sun Highway; Black- 

 feet Highway. YELLOWSTONE, rare: Cooke City road. GRAND TETON: Granite Canyon. 

 POCKY MOUNTAIN, common, 8,500 to 10,000 feet. ZION. GRAND CANYON. 



37. Prairie Willow (Sal.x humtlis March). — Shrub 3 to 10 feet high 

 with many stems from the base; leaves oblong-lance-shaped to reverse lance- 

 shaped, 2 to 6 inches long, becoming smooth above, whitish and softly hairy 

 below, the margins wavy but not toothed, more or less rolled in at the edges; 

 catkins egg-shaped to elliptic, ^2 to I1/2 inches long, naked at the base, ap- 

 pearing before the leaves, often recurved; scales persistent, dark-colored; sta- 

 mens 2, the filaments smooth; capsules hairy, borne on short stalks, the styles 

 short or none. 



Occurrence. — ISLE ROYALE, common: Mott Island; near Scoville Point. 



38. Pussy Willow (Salix discolor Muhl.). — Large shrub or small tree 

 found in low meadows, along streams, or around margins of lakes or swamps; 

 leaves elliptic-oblong to reverse-lance-shaped, smooth and bright green above, 

 covered with a whitish bloom below, irregularly toothed or nearly entire, 

 pointed at both ends, 1% to 4 inches long; catkins cylindric, 1 to 3 inches 

 long, naked at base, appearing before the leaves; scales dark red, brown, or 

 blackish, densely covered with long glossy hairs; stamens 2, the filaments 

 smooth, distinct; anthers yellow; capsules finely hairy, the styles short but 

 distinct. 



Occurrence. — iSLE ROYALE: Washington Harbor; near Scoville Point. 



39. Planeleaf Willow (Salix planifolia Pursh). — Low, almost pros- 

 trate plant 6 inches high or erect shrub ^ feet (or rarely 8 feet) high, form- 

 ing large clumps; branchlets brown or purplish, smooth and shining, or some- 

 times covered with a whitish bloom; leaves egg-shaped to oblong or reverse- 

 egg-shaped, 1/2 to 2 1/4 inches long, smooth and bright green above, paler below 

 or often whitish, the margins not toothed, or with a few fine teeth, becoming 

 somewhat leathery; catkins appearing with the leaves, not stalked, often with 

 a few leafy bracts at base; scales brownish to nearly black, hairy; stamens 2, 

 the filaments distinct, smooth; capsules hairy, not stalked, the styles 1 mm. 

 or more long. (Syns. S. planifolia Pursh var. Nelsoni Ball, S. chlorophylla 

 of our area, S. monica Bebb., S. phylicifolia of Am. authors.) 



