"•>-' SALICACKAE. 



Cimarron; cliaparrcl-covcrcd liills southeast of Ouray; Turkey Creek and 

 tributaries; Fort Collins; Mancos; Garden of the Gods; near l^oulder; 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. Amvgd.alinae. 



Petioles with glands ; leaves densely glandular-serrate. 



II. Pentandrae. 

 Stamens 2: stipe very short or none. III. Longifoi.iae. 



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. Lo.xgifgi.iae. 



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 H mm. or less long. 



V. ROSTRATAE. 



Stipe shorter than the bracts ; styles usually about i mm. long. 



VI. Brachvstachyae. 

 Capsule scarcely rostrate, subsessile or if stipitate, stipe shorter than the 

 style. 

 Style evident, at least J-4 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. Amvgdalinae. 



Leaf-blades narrowly lanceolate; petioles short. i. 5'. Wriglitii. 



Leaf-blades broadly lanceolate ; petioles slender. 2. S. amygdaloides. 



II. Pentandrae. 



Represented only by 3. 5". Fendlcriana. 



III. L0NGIF0LL\E. 



Capsule glabrous. 



Capsule sessile. 4- S. exigua. 



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". Imearifolia. 



Capsule more or less pubescent. 



Capsule sparingly silky, often becoming glabrous in age. 

 Leaves permanently silky ; bracts not densely silky. 



5. 5. luteosericea. 

 Leaves glabrous or nearly so when mature : bracts densely silky ; aments 

 dense. 8. 5". sessiliflora. 



Capsule densely white-villous ; stigma sessile. 9. S. argophylla. 



