1924] : 
GRANT—A MONOGRAPH OF THE GENUS MIMULUS 221 
places along streams, San Bernardino Forest Reserve, 28 Dec., 
1903, Mell & Knopf (M); Caliente, 11 May, 1891, 7. S. 
Brandegee (Calif.). 
Numerous specimens of M. floribundus occur which show 
slight geniculations at some of the nodes and connect the variety 
with the species. 
44b. Var. membranaceus (A. Nels.) Grant, comb. nov. 
M. membranaceus A. Nels. in Bot. Gaz. 34: 30. 1902; Rydb. 
Fl. Rocky Mountains, 779. 1917. 
Stems slender, more or less procumbent, sparsely villous, 
geniculate, sometimes winged on the upper part; leaves thin, 
membranaceous, often almost glabrous, the petioles frequently 
winged. 
Distribution: in damp, shaded places in Rocky Mountains and 
in California. 
Specimens examined: 
Montana: McDonald Lake, 7 Aug., 1893, Williams 343 (R. Mt.). 
Wyoming: under moist cliffs, Crow Creek, Albany Co., July, 
1903, Nelson 8951 (G, M, and R. Mt.); Cummins, 28 July, 
1895, Nelson 1515 (Cornell, M, and R. Mt.); headwaters of 
Clear Creek and Crazy Woman River, Big Horn Mts., 7000- 
9000 ft. alt., 20 July-15 Aug., Tweedy 3423 (R. Mt.); in damp, 
shaded woods, Centennial, Albany Co., 27 July, 1900, Nelson 
7729 (R. Mt.); Centennial Hills, 17 Aug., 1895, Nelson 1683 
(С, Cornell, M, and В. Mt., түре); Centennial, Albany Co., 
7 Aug., 1902, Nelson 8828 (G, Cornell, M, R. Mt., and Po- 
Colorado: Flagstaff Mt., near Boulder, 19 July, 1906, Robbins 
2188 (R. Мы); in wet places, mountain sides about Empire, 
6 Aug., 1892, Patterson 251 (M); wet rocks, Georgetown, 17 
Aug., 1874, Engelmann (M). 
Idaho: shaded river banks, St. Anthony, 5 July, 1901, Merrill 
& Wilcox 827 (В. Mt.). 
tah: Bullion Caüon, in and near the Gorge, 27 July, 1905, 
Rydberg & Carlton 7269 (R. Mt.). 
ornia: hills about 3 miles above Pollasky, 11 April, 1906, 
Heller 8142 (Phil, M, and Stanford); Millard Canyon, near 
