392 MINNESOTA BOTANICAL STUDIES. 
DRUPACE#. 
Prunus americana Marsu. Arb. Am. 111. 1785. 
Coll.: Wheeler 353, Crooked Creek. July. 
Prunus nigra Air. Hort. Kew. 2: 165. 1789. 
Coll.: Wheeler 321, 354, Mayville; 501, Winnebago. 
July, Aug. 
Not previously reported from Minnesota. This species has 
been recognized by horticulturists in several parts of the 
state but no previous authentic collections are known to 
have been made. It is common on the lowlands of the 
North and South forks of Crooked creek. Also col- 
lected on the banks of Winnebago creek and in East 
Burns valley, Winona county. 
Prunus virginiana L. Sp. Pl. 473. 1753. 
Coll.: Wheeler 345, Crooked Creek. July. 
Prunus serotina Euru. Beitr. 3: 20. 1788. 
Coll.: Wheeler 178, Winnebago. June. 
CHSALPINACE#. 
Cassia chamecrista L. Sp. Pl. 379. 1753. 
Coll.: Lyon 256, Jefferson. July. 
Gleditsia triacanthos L. Sp. Pl. 1056. 1753. 
Coll.: Lyon and Wheeler; 413, W. Jefferson. July. 
Not previously reported from Minnesota. This tree has been 
frequently cultivated for ornament throughout the southern 
part of the state but no native trees have previously been 
reported. It is frequent on the islands of the Mississippi 
river in northeastern Iowa and extends north along the 
river into Houston county, Minnesota, where it probably 
reaches its northern limit. The tree from which the col- 
lection was made is 59 feet high and has a trunk-circum- 
ference of 6 feet, 3 feet from the ground. 
Gymnocladus dioica Kocu, Dendrol. 1: 5. 1869. 
Coll.: Lyon 193, 230, Crooked Creek; 271, Jétterson: 
july. (Plate Xo, 2s) 
PAPILIONACE#. 
Baptisia bracteata ELL. Bot. S.C. & Ga. 1: 469. 1817. 
Coll.: Wheeler 94, Lyon 34, Winnebago; Lyon 202, 
Crooked Creek. June, July. 
