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, pl. 4. 
A. canadensis. Blakeslee & Jarvis, 
331, 334, 492, pl.; Brendel, pl. 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. 
Hastern. (1). A. canadensis. 
Buds blackish, stout: Western. A. alnifolia. 
Winter-characters to Rosaceae not considered here:— 
Mespilus cuneata. Shirasawa, 252, pl. 5. M. germanica. 
Bosemann, 51; Schneider, f. 74; Willkomm, 32, f. 43. Pera- 
phylum ramosissimum. Schneider, f. ‘71. Pourthiaea vil- 
losa. Shirasawa, 247, pl. 
