1912] Wiegand,— Amelanchier in eastern North America 143 
rods in extent, like a thicket of raspberries or osier-dogwood, and the 
closely crowded stems composing it are only from one to three feet in 
height, and when found were flowering profusely, regardless of size." 
Occasionally, both in Vermont and at Ithaca, N. Y., individual 
plants occur with obovate-cuneate leaves dentate near the apex 
only, but in other respects typical. These seem like mere individual 
variations from the normal type. 
The following typical specimens have been examined. VERMONT: 
— Lake Champlain, limestone headlands, Cloak Island, Isle la 
Motte, June, 1907, J. A. Cushman, no. 871 (probably); dry banks of 
Grand Isle, Robbins, Oakes (probably). New York: — Rensselaer 
Co. Lansingburg, C. H. Peck; Troy, H. H. Eaton: Orange Co. West 
Point, May, 1882, Ella W. Meams (probably): Tompkins Co. exposed 
rocks, shore of Cayuga Lake, Ithaca, 1896, Wiegand. ONTARIO: — 
Near Mt. Dennis, June, 1900, D. W. Beadle; Hastings Co., Belleville, 
1878, Macoun; vicinity of Ottawa, July 1906, Rydberg, no. 7912. 
Onurto: — Franklin Co. Columbus, Sullivant (?). Micutgan: — Kent 
Co. very barren sand, June, 1897, C. W. Fallass. Wisconstn:— 
1882, J. Dunlop: Dame Co. 1861, T. J. Hale. lowa4:— Floyd Co. 
Charles City, May, 1875, J. C. Arthur: Fayette Co., 1894, B. Fink. 
Minnesota: — Houston Co. Spring Grove, June, 1902, C. O. 
Rosendahl, no. 316. | NEBRASKA: — Cherry Co. Valentine, May, 
1898, Bates; Simeon, July, 1899, Bates; Merriman, 1898, Bates: 
Dawes Co. Fort Robinson, May, 1897, Bates: Greeley Co. Scotia 
Junction, Bates: Rock Co. Kirkwood, Bates: Brown Co. Johnstown, 
Bates. ALBERTA:— vicinity of Banff, June, 1906, Stewardson Brown, 
nos. 23 & 56 (not typical). ATHaBascaA:— Athabasca River, 1892, 
Miss E. Taylor (probably this sp.). MacKenzie: — Fort Resolution, 
1903, E. A. Preble, no. 202 (probably this sp.). 
3. A. FLORIDA Lindley. 
Aronia alnifolia Nutt., Gen. Am. i. p. 306 (1818), possibly: Amelan- 
chier florida Lindley, Bot. Reg. t. 1589 (1833): Am. alnifolia, many 
Am. authors. 
Shrub 0.5-3 m. high: leaves broadly oval or short-oblong-oval 
(blade of average leaf 3-4 cm. X 2.5-3.3 em.); base subtruncate, 
rarely rounded or subcordate; apex rounded, subtruncate, or rarely 
retuse; margin coarsely and sharply toothed, usually to the middle 
or rarely below, with few, spreading, deltoid, obliquely acute teeth 
(3-5 teeth per cm.), and acute open sinuses; green above when young, 
fully unfolded but not full grown at flowering time, tomentose at first 
but very soon entirely glabrous (usually before the flowers are fully 
expanded); veins about 12 pairs, rather conspicuous, parallel, close 
