500 



SALICACEAE 



27. Salix hookeriana Barratt. 

 Coast Willow. Fig. 1216. 



Sali.v hookeriana Barratt., in Hooker, Fl. Bor.-Am. 

 2: 145. pi. 18. 1839. 



Shrub or tree, 4-8 or 10 m. high, with 

 rough dark-gray bark; twigs densely pu- 

 bescent and very brittle ; leaves broadly 

 lanceolaite or elliptic-oval, acute, crena>te- 

 serrate to subentire, dark green and gla- 

 brous above, densely white- (becoming rusty-) 

 tomentose beneath, 3-12 cm. long, 1-4 cm. 

 wide ; aments appearing before the leaves ; 

 staminate aments stout, short-cylindric, 

 densely flowered, 2-5 cm. long, the obovare 

 scales black, densely covered with long white 

 hairs ; pistillate aments 4-7 cm. long, stout ; 

 capsules glabrous, 6-8 mm. long; pedicels 1 

 mm. long; style 1 mm. long; stigmas short. 



A species occurring mainly near the ocean beach. 

 Humid Transition and Canadian Zones; from Van- 

 couver Island to Humboldt County, California 

 (Eureka, Piper 5027); rare along the shores of Puget 

 Sound. Type locality: "N. W. Coast of America," 

 probably Vancouver Island. 



Salix hookeriana tomentosa Henry, in Schneider, Jour. Arnold Arb. 1 : 220. 1920. As the species 

 except capsules wholly or mostly tomentose. 



With the species. Type locality: Vancouver Island, British Columbia. 



28. Salix cascadensis Cockerell. 



Cascade Willow. Fig. 1217. 



Sali.\- cascadensis Cockerell, Muhlenb. 3: 9. 1907. 

 Salix tenera Anderss. in DC. Prod. 16^: 288. 1868, not 

 Braun, 1850. 



Prostrate creeping shrub about 5 cm. high ; 

 leaves narrowly elliptical to obovate, broadest at or 

 above the middle, acute at each end or rarely obtuse 

 at the apex, entire, green and shining above, pale 

 beneath, glabrous, 8-15 mm. long, strongly veined, 

 the old leaves persistent ; aments small, subglobose, 

 5-20 mm. long, few flow^ered ; scales brownish, vil- 

 lous ; capsules sessile, 4-5 mm. long, tomentose ; 

 styles elongate, 1-1.5 mm. long; stamens 2. 



Rare; on alpine summits. Boreal Zones; from southern 

 British Columbia through Washington to Wyoming. Type 

 locality: eastern summits of "Cascade Mountains, lat. 49", 

 7,000 feet." 



29. Salix petrophila Rydberg. 

 Alpine Willow. Fig. 1218. 



287. 



Salix arctica petrea Andersson, in DC. Prod. 16- 



1868. 

 Salix pertophila Rydberg, Bull. N. Y. Bot. Card. 1 : 



268. 1899. 

 Salix tenera as interpreted by Jepson, FI. Calif. 344. 



1909, not Anderss. 1868. 



Stems horizontal, creeping; branches erect, 

 glabrous, brown or yellowish, 5-10 cm. high; 

 leaves elliptical or broadly elliptical to obovate, 

 abruptly acute to obtusish, entire, deep green 

 above, distinctly paler to subglaucous beneath, 

 rather strongly veined, 1.5-4 cm. long, 1-1.5 cm. 

 wide, glabrate or glabrous ; petioles slender, yel- 

 low ; aments coetaneous, terminating leafy 

 branches ; the staminate 1-2 cm. long ; stamens 



