38 HANDBOOK 14 8, U.S. DEPARTMENT OF AGRICULTURE 



stipules often present ; catkins appearing with the leaves, 

 usually on short, leafy or leafy-bracted stalks; seed pods 

 and stamen stalks hairless; flower scales hairy. 

 25. Under leaf-surface whitened (glaucous). 



26. Leaves lance-shaped, broadest near base, rounded 

 or heart-shaped at base, pointed or tapering at tip, 

 hairless or nearly so. 

 27. Twigs yellowish, hairless; leaves yellowish-green 

 on upper surface; stipules egg- or half-moon- 

 shaped in outline; clustered shrubs to nearly 20 

 feet high; meadows or along streams, to 7,000 feet, 

 e. Oreg., e. Wash.; type locality, "Rocky Moun- 

 tains westward to the Oregon" (Columbia River). 



yellow willow (Salix luted). 

 27. Twigs reddish to dark brown, often hairy; leaves 

 dark green on upper surface; stipules kidney- or 

 half-moon-shaped in outline; catkins long; anthers 

 often bright red before shedding pollen; shrub or 

 small tree to nearly 20 feet high; moist sites, to 

 5,000 feet, both sides of Cascades, Oreg., Wash. 



Mackenzie willow (Salix mackenziana). 

 26. Leaves varying from reversely egg-shaped (obovate) 

 to elliptic-oval or broadly oblanceolate, narrowed to 

 somewhat heart-shaped at base, pointed to abruptly 

 short-tapered at tip, dark green and thinly hairy on 

 upper surface, net-veiny and usually hairless on 

 under surface; stipules egg- to heart-shaped in out- 

 line, to l /2 inch long; twigs stoutish, yellow, soon 

 becoming brown, drying black, often thinly soft- 

 hairy; shrubs to 13 feet high, in boggy sites, higher 

 altitudes, mts. of ne. Oreg., rare in Cascades. 



Barclay willow (Salix barclayi). 

 25. Under leaf-surface not whitened (glaucous) as above, 

 green; leaves net- veiny, rather broad; stipules usually 

 present, at least on fast-growing shoots; twigs yellowish 

 when young, soon becoming brown to reddish or 

 black; catkins appearing with the leaves, stalked, 

 leafy or leafy-bracted at base. 

 28. Leaf margins cartilaginous, finely saw-toothed, 

 teeth glandular; leaves thickish, paler green on 

 under surface, hairless or nearly so, elliptic-lance- 

 shaped to oblong-oval, rounded or heart-shaped 

 at base; stipules narrowly egg-shaped in outline, 

 to % inch long; catkins to 1% inches long; twigs 

 yellowish to reddish brown, shining, almost hairless; 

 shrubs, often in clumps, to 13 feet high; mountain 

 streams, e. side of Cascades, in ne. Oreg., e. Wash. 

 firmleaf willow (Salix pseudocordata) . 

 28. Leaf margins not cartilaginous and leaves not 

 thickish as above; leaves nearly equally green on 

 both sides, pointed or abruptly tapered at tip; 

 shrubs to nearly 10 feet high. 



