WILLOW FAMILY 339 



stipules minute and caducous or none; mature leaves oblong-lanceolate to 

 lanceolate, obtusish at base, acute at apex or sometimes long-pointed, serru- 

 late, glabrous, green and shining above, pale or conspicuously glaucous be- 

 neath, 2!/o to 71/2 inches long, % to 1*4 inches broad ; petioles 1 to 5 lines long ; 

 staminate catkins commonly flexuous, iy 2 to 4y 2 inches long, 4 or 5 lines thick ; 

 pistillate catkins % to 2 inches long, 2 lines thick; scales soon spreading or 

 reflexed, elliptic, blunt, woolly at base, glabrous and pallid towards apex, 2 

 to 4-toothed, the staminate yellow, the pistillate gray and tardily deciduous; 

 stamens 4 to 7 (sometimes 3) ; ovary and capsule glabrous. 



Coast Ranges, Sacramento and San Joaquin valleys, Sierra Nevada (espec- 

 ially the foothills) and southward to Southern California. Usually along 

 living streams, ranging altitudinally from near sea-level to 4,500 feet in the 

 southern Sierra Nevada. Also called Bebb Willow, Smooth Willow and 

 Spotted-leaf Willow. Extends north to southern British Columbia. 



Forma araquipa Jepson n. form. Small tree ; one-year-old shoot with dense 

 close tomentuni; brown tuft of hairs on old wood at base of season's shoot 

 very conspicuous ; leaves reddish brown above ; catkins long and dense. 

 (Arbor parva ramulis annotinis cum denso appresso tomento; valde manifestus 

 Cespes fusci pili basi horni ramuli in ligno vetere ; folia rufo-fusca supra ; 

 amenta longa artaque). Dry gulches, Araquipa Hills, Solano Co., May 2-6, 

 1891, W.L.J. 



Eefs. SALIX LAEVIGATA Bebb, Am. Nat. vol. 8, p. 202 (1874) ; Jepson, Fl. W. Mid. Cal. 

 p. 136 (1901). Bebb had his original specimens from Santa Cruz, Ukiah and Alameda Co. 



3. S. nigra Marsh. BLACK WILLOW. Tree commonly 20 to 50 feet high with 

 rough dark bark ; branchlets brittle at the base ; mature leaves narrowly lanceo- 

 late, long-pointed, often falcate, serrulate, glabrous, green on both surfaces, 

 2 to 7 inches long, 2 to 4 (or 8) lines wide; petioles 1 line long; stipules early 

 deciduous; scales of catkins obovate, yellow, hairy, erect; staminate catkins 

 iy? to 2 1 /o inches long; stamens 3 to 5; pistillate catkins % to l^ inches long, 

 in fruit 1 to 2y 2 inches long, becoming rather lax ; ovary scantily pubescent or 

 loary; capsule glabrous, reddish brown. 



River banks in the Sacramento and San Joaquin valleys, extending into the 

 lower Sierra Nevada foothills, ranging southward to Southern California and 

 following the desert rivers across the Mojave to southern Arizona, thence 

 jastward to the Mississippi Valley and north to New Brunswick. It has a 



lore extensive range than any other tree in the United States except the Aspen. 



Eefs. SALIX NIGRA Marsh, Arbust. Am. p. 139 (1785) ; Jepson, Fl. W. Mid. Cal. p. 136 

 (1901.) 



4. S. sessilifolia Nutt. SANDBAR WILLOW. Shrub with slender stems 5 to 

 L4 feet high, or becoming a tree up to 25 feet high ; foliage silvery or becoming 



lore or less green ; leaves linear, usually tapering to the acute apex and to the 

 larrow but short petiole-like base, entire, 1 to 3 inches long, 2 to 4 lines broad, 

 thinly villous on both surfaces and green, or densely villous and silky, especially 

 )n young or sterile shoots ; no stipules ; catkins on leafy peduncles ; staminate 

 3atkins % to 1 inch long, slender (2 lines thick), in bud usually cylindric, the 

 scales with acute green tips'; gland long and slender; pistillate catkin % to 

 inch long, 3 lines broad, often not dense; ovary sessile, densely silky; style 

 present, stigmas linear; capsule densely silky, or glabrescent and brown. 

 Abundant in stream beds of the Coast Ranges, Great Valley and Sierra 



Nevada foothills, ranging northward into Oregon. 



