54 
SALICACEAE. 
Petioles with wart-like glands at summit; stipules usually present.. 
1. S. lasiandra. 
Petioles not glandular; stipules often absent. 
Leaves broadly lanceolate, usually glaucous beneath....2, S. laevigata. 
Leaves very narrow, nearly alike on both faces, often curving 
towards apex.3. S. nigra. 
Stamens 2; large shrubs, the trunk bark mostly smooth. 
Stigmas linear, raised on a distinct style.4. S. sessilifolia. 
Stigmas roundish, oblong, sessile or nearly so. 5. S. melanopsis. 
Filaments of the stamens glabrous or mainly so ; stamens 2 ; trunk bark smooth or 
slightly roughened. 
Style none ; leaves obovate...6. 5. scouleriana. 
Style conspicuous or at least evident. 
Capsule silky or pubescent...7. S. sitchensis. 
Capsule essentially glabrous.8. 5“. lasiolepis. 
1. S. lasiandra Benth. Yellow Willow. Tree 8 to 14 m. high; 
branchlets yellowish; leaves lanceolate, long-pointed, often pale or glau¬ 
cous beneath; stipules broad, mostly conspicuous; catkins straight; sta¬ 
mens 5 to 9.—Coast Range streams. 
2. S. laevigata Bebb. Red Willow. Tree 8 to 15 m. high; branchlets 
reddish; mature leaves lanceolate or oblong-lanceolate, green and shining 
above, pale or glaucous beneath; staminate catkins often flexuous; sta¬ 
mens 5 or 6.—Coast Range streams. 
3. S. nigra Marsh var. vallicola Dudley. Black Willow. Tree 6 to 
10 rn. high; mature leaves lanceolate or linear-lanceolate, long-pointed, 
often somewhat sickle-shaped, green on both surfaces; stamens 3 to 5.— 
Great Valley to S. Cal. 
4. S. sessilifolia Nutt. var. hindsiana And. Sandbar Willow. Shrub 
1.4 to 4 m. high; leaves linear, entire, thinly villous and green, or densely 
villous and silky; catkins slender.—Flood beds of streams. It is an im¬ 
portant species in binding stream banks and levees against flood erosion. 
5. S. melanopsis Nutt. var. bolanderiana Schn. Longleaf Willow. 
Shrub 1.4 to 4.3 m. high ; leaves lanceolate or linear, remotely serrulate, 
mostly glabrous; catkin scales densely woolly.—Stream beds in valleys and 
foothills and into the mountains. 
6. S. scouleriana Barr.- Nuttall Willow. Shrub or small tree 2 to 
7 m. high; leaves broadly obovate or oblong-obovate, entire, yellow-green 
and lustrous above, yellow-veined, glabrate or densely short-silky be¬ 
neath; catkins appearing before the leaves.—Hill slopes, low'altitudes 
near the coast, 4000 to 10,000 ft. in the higher mountains. 
7. S. sitchensis Sanson. Velvet Willow. Trees or shrubs 4 to 10 m. 
high; leaves oblong-ovate to oblanceolate, lustrous silky beneath, dark 
green and glabrous above, sometimes thick and leathery; pistillate cat¬ 
kins very slender, in flower 1.8 to 4.8 cm. long—Stream banks near the 
coast. 
8. S. lasiolepis Benth. Arroyo Willow. Trees or shrubs 3 to 5 m. 
high; trunk bark mostly smooth; mature leaves oblong, obscurely ser¬ 
rulate, dull green above, grayish beneath; catkins densely silky-tomen- 
tose, in flower 1.8 to 2.4 cm. long.—Rivers and creeks, and even along dry 
gulches in the hills. 
2. POPULUS L. Poplar 
Leaves broad, ovate or roundish, long-petioled. Catkins pendulous. 
