GRANT—A MONOGRAPH OF THE GENUS MIMULUS 191 
M. reniformis Engelm. ex Benth. in DC. Prodr. 10: 371. 1846. 
M. madrensis Seem. in Bot. Herald, 322, pl. 58. 1852-57. 
M. glabratus var. Jamesii Gray, Syn. Fl. №. Am. ed. 2, 2': 
Suppl. 447. 1886; Robinson & Fernald in Gray, Manual, ed. 7, 
723. 1908. 
M. inamoenus Greene, Pittonia 5: 137. 1903. 
Leaves mostly suborbicular, oval with a rounded apex and sub- 
eordate base or occasionally nearly reniform, margin entire, 
undulate, denticulate or irregularly and sparsely dentate; pedi- 
cels and calyx often pubescent. 
Distribution: common in shallow water or in muddy places, 
through central North America from Manitoba to Mexico, west 
to Montana, Nevada and Arizona; apparently a calcophile. 
Specimens examined: ' 
Manitoba: river bank, growing in running water, Aweme, 5 Aug., 
1905, Criddle (M). 7 
Michigan: in water at outlet of spring, Black Lake, Cheboygan, 
20 Aug:, 1890, Kofoid (M); aquatic herb in Carp Creek, near 
Douglas Lake, Cheboygan Co., 21 July, 1917, Gates & Gates 
10618 (M). ) 
Wisconsin: Delavan Lake, Walworth Co., 14 June, 1896, Skeels 
(Cornell); St. Croix Falls, Polk Co., 7 Aug., 1900, C. F. Baker 
(Pomona). ; i . 
Illinois: Peoria, 1859, Brendel (M). 
Minnesota: Minnehaha Falls, 12 Aug., 1886, Wislizenus 561 (M); 
Minneapolis, 17 Aug., 1873, Herrick 33 (M); Cannon Falls, 
July, 1891, Sandberg 376 (Stanford). 
Iowa: limestone springs, Clinton Co., 1 July, 1878, Butler 24 
(M); in clear running water near the Missouri River, 27 May, 
1920, James (N. Y.). 
Missouri: Springfield, 5 May, 1888, Blankinship (M); in springs, 
Barry Co., 15 Aug., 1895, Blankinship (R. Mt.); wet limestone 
ledges about spring, bluffs of Mississippi River near Ste. 
Genevieve, 25 June, 1920, E. J. Palmer 18035 (M). 
North Dakota: in mud and water, Kathryn, 18 July, 1912, 
Bergman 2290 (M); in springs at end of Lake, Stump Lake 
Springs, 25 July, 1911, Tufte 227 (R. Mt.); Devil's Lake, 
e id Northwestern Exp., 1 Aug., 1839, Geyer 119 (N. Y. 
