48 WOODY PLANTS 



older reddish-brown 

 or darker, shining, not 

 clearly furrowed, the 

 larger somewhat gray- 

 ish at base 



h. Bark brown, twigs 



longish (hairy in 



var. intonsa ) 1. S. lucida 



h. Bark olive -green, 



shining, twigs 



shorter 2. S. serissima 



g. Seasonal twigs yel- 

 lowish-brown, older 

 dark brown or black- 

 ish, shallowly straight- 

 furrowed, some partly 

 shining, many short 

 and divaricate 11. S. pyrifolia 



f. Twigs mostly slender to 

 occasionally midsized, 

 1-4 (-5)mm.wide at base 



g. Bark gray; twigs 

 slender, leafy, young 

 yellowish and occa- 

 sionally puberulent, 

 older dark brown or 

 reddish-brown, glab- 

 rous, seldom shining 13. S. petiolaris 



g. Bark brown ;twigs slen- 

 der or sometimes mid- 

 sized, longish, young 

 yellowish-brown to 

 dark brown, puberulent, 

 older dark brown to 

 black, glabrous or 

 sometimes micro- 

 puberulent (plants with 

 older twigs pubescent 

 probably represent 

 S. subsericea) 14. S. sericea 



f . Twigs stoutish, reddish 

 or reddish-purple to 



