110 



ROSACEAE. 



Amelanchier. Shadbush. 

 (Family Rosaceae). 



Shrubs or open trees: decidu- 

 ous. Wood hard, reddish brown, 

 ring-porous with minute ducts. 

 Twigs rather slender, zig-zag, 

 nearly terete: pith somewhat 5- 

 sided, continuous, pale. Buds 

 moderate, solitary, elongated, ses- 

 sile, with half-a-dozen sometimes 

 twisted scales. Leaf-scars alter- 

 nate, sometimes 2-ranked, more or 

 less elevated, narrowly crescent- 

 or U-shaped: bundle traces 3: 

 stipule-scars lacking. 



Winter-character references: 

 A. asiatica. Shirasawa, 247, pi. 4. 

 A. canadensis. Blakeslee & Jarvis, 

 331, 334, 492, pi.; Brendel, pi. 3; 

 Hitchcock (1), 4; Otis, 148; 

 Schneider, f. 171. A. rotundifolia. 

 Bosemann, 79; Schneider f. 171; 

 Willkomm, 32, f. 44. A. spicata. 



Schneider, f. 71. 



Buds red-brown or straw-color, slender. 



Eastern. (1). A. canadensis. 



Buds blackish, stout: Western. A. alnifolia. 



Winter-characters to Rosaceae not considered here: 



Mespilus cuneata. Shirasawa, 252, pi. 5. M. germanica. 



Bosemann, 51; Schneider, f. 74; Willkomm, 32, f. 43. Pera- 



phyllum ramosissimum. Schneider, f. 71. Pourthiaea vil- 



losa. Shirasawa, 247, pi. 



