Bailey &: Bailey: Woody Plants of National Parks 41 



Leaves more or less hairy, at least below, found in Rocky 



Mountain National Park 27. S. monticola. 



Styles mostly less than 1 mm. long. 



Leaves mostly not toothed, or remotely toothed. 



Tall shrubs 5 to 12 (or 30) feel high; leaves lYi to 5 inches 

 long. 



Leaves of flovvfering shoots narrowly elliptic-oblong, ^^ to 

 1 J/1} inches long; summer leaves up to 6 inches 

 long;; found in Rocky Mountain National Park 

 1 1. S. irrorala. 



Leaves mostly linear to narrowly leverse-egg-shaped, 2 to 5 



inches long; found m Pacific Slope parks 



28. 5. lasiolepis. 



Low shrubs not more than 6 feet high; leaves mostly less than 2 

 inches long. 



Shrubs 3 to 6 feet high; scales of catkins yellowish, often 

 colored at tips; eastern species found on Isle 

 Royale 15. 5. pedicellaris. 



Shrubs 1 to 2 feet high; scales of catkins brownish at tips; 



western species found in Rocky Mountains 



29. 5. Farrae. 



Leaves mostly finely toothed. 



Mature leaves firm, thickish. 



Leaves whitish below ; stalks of capsules 2'/2 to 4 mm. long 



30. S. Macl^enziana. 



Leaves green on both sides; stalks of capsules 1 to l|/2 mm. 



long 31. S. pseudocordata. 



Mature leaves thinnish. 



Twigs yellowish; leaves yellowish-green 32. S. lutea. 



Twigs reddish or olive; leaves dark green above. 



Filaments of stamens joined at base; western species 



33. 5. monochroma. 



Filaments of stamens distinct; eastern species found on 



Isle Royale 34. 5. pyrifolla. 



Capsules hairy; leaves hairy below or covered with a whitish bloom. 



Leaves roundish to broadly elliptic or in variety narrowly elliptic with 

 pointed tips, dark green and strongly veined above, densely long- 

 white-hairy below; style none; occurs in Glacier National Park 

 - 35. 5. veslita. 



Leaves egg-shaped or reverse-egg-shaped to narrowly lance-shaped or re- 

 verse-lance-shaped or sometimes almost linear, not strongly veined 

 above, smooth or hairy below; styles evident or none. 



Catkins mostly appearing before the leaves, mostly naked at base; 

 styles very short or none. 



Leaves reverse-egg-shaped or elliptic-oblong to reverse-lence- 

 shaped, abruptly pwinted to rounded at the tips; catkins 

 thick. 



Western species common in most of the western national 

 parks; leaves smooth or hairy below; catkins ob- 

 long or elliptic, Yl to I inch long ....36. 5. Scouleriana. 



