92 
SALICACEAE. 
Cimarron; chaparrel-covered hills southeast of Ouray; Turkey Creek and 
tributaries; Fort Collins; Mancos; Garden of the Gods; near Boulder; Rist 
Canon; banks of the Poudre River; Redstone; Hardin’s ranch; Trinidad. 
2. SALIX L. Willow. 
Capsule glabrous. 
Filaments hairy, at least below ; bracts caducous, light yellow. 
Stamens 3-7 ; stipe slender, 2-5 times as long as the nectaries. 
Petioles without glands; leaves serrulate, thin. I. Amygdalinae. 
Petioles with glands; leaves densely glandular-serrate. 
II. Pentandrae. 
Stamens 2 ; stipe very short or none. III. Longifoliae. 
Filaments glabrous; bracts persistant, seldom light yellow. 
IV. CORDATAE. 
Capsule hairy. 
Filaments hairy. 
Leaf-blades linear to lanceolate not very veiny; bracts caducous; tall 
shrubs. III. Longifoliae. 
Leaf-blades oval or suborbicular, very veiny; bracts persistent; depressed 
shrubs. IX. Reticulatae. 
Filaments glabrous; bracts more or less persistent. 
Capsule rostrate, distinctly stipitate; style none or short, always shorter 
than the stipe. 
Stipe equalling or exceeding the bracts; styles y 2 mm. or less long. 
V. Rostratae. 
Stipe shorter than the bracts; styles usually about 1 mm. long. 
VI. Brachystachyae. 
Capsule scarcely rostrate, subsessile or if stipitate, stipe shorter than the 
style. 
Style evident, at least Yz mm. long. 
Leaves permanently white-silky or tomentose, at least beneath. 
VII. Pellitae. 
Leaves either green or grayish beneath. VIII. Arcticae. 
Style none; depressed shrubs with entire strongly veined leaves. 
IX. Reticulatae. 
I. Amygdalinae. 
Leaf-blades narrowly lanceolate; petioles short. 
Leaf-blades broadly lanceolate; petioles slender. 
II. Pentandrae. 
Represented only by 
III. Longifoliae. 
Capsule glabrous. 
Capsule sessile. 
Capsule stipitate. 
Leaves permanently silky. 
Leaves 3-5 mm. wide; ovary without hairy swelling at the apex. 
5. 5*. luteosericea. 
Leaves 2-3 mm. wide; ovary with a hairy swelling at the apex. 
6 . S. stenophylla. 
Leaves glabrous when mature. 7. S. linearifolia. 
Capsule more or less pubescent. 
Capsule sparingly silky, often becoming glabrous in age. 
Leaves permanently silky; bracts not densely silky. 
5. S. luteosericea. 
Leaves glabrous or nearly so when mature; bracts densely silky; aments 
dense. 8. 5 ". sessilidora. 
Capsule densely white-villous; stigma sessile. 9. 6*. argophylla. 
1. S. Wrightii. 
2. S. amygdaloides. 
3. S. Fendleriana. 
4. .S', exigua. 
