1924] 
GRANT—A MONOGRAPH OF THE GENUS MIMULUS 181 
30 May, 1917, Jenkins & Street (Pomona); around small spring, | 
vicinity of Bonanza King Mine, east slope of Providence Mts., 
Mohave Desert, 21-24 May, 1920, Munz, Johnston & Harwood 
4081 in part (M and Pomona); Milliards Cafion, San Gabriel 
Mts., 2500 ft. alt., 19 Мау, 1918, Pierson 197 (Calif.); Reche 
Cafion, near San Bernardino, 20 May, 1894, Parish (Calif.); 
southern slope of the San Bernardino Mts., 3500 ft. alt., 29 
May, 1906, Parish 5764 (R. Mt.); wet sand in wash; Upland, 
San Bernardino Co., 4 May, 1917, Parish 11170 (M); Cascade 
Сайоп, San Antonio Mts., 4250 ft. alt., 23 June, 1918, 1. M. 
Johnston (Ротопа); edge of small stream, Devil's Canyon, 
1500 ft. alt., 10 May, 1919, Munz 2780 (Pomona); Harvey's 
Ranch, near El Nido, San Diego Co., 20 May, 1903, Abrams 
3538 (М); stream-sides and canyons, La Jolla, 1 June, 1914, 
Clements & Clements 126 (M). 
Mexico: 
Chihuahua: springy places, Sierra Madre, 29 Sept., 1887, Pringle 
1347 (U. S.). 
Lower California: near San Rafael, northern Lower California, 
11 July, 1885, Orcutt 1304 (M); All Saints Bay, April, 1885, 
Greene (С); Santa Agneda, 1890, Edw. Palmer 233 (U. 8.); 
Lower California, 4-6 March, 1890, Edw. Palmer 233 (U. 8.). 
This species exhibits wide variation in the size of the plant, 
the length of the flowers, and of the leaves. This is due, appar- 
ently, to а response to environmental conditions, moisture being 
the main factor concerned. The following specimens are note- 
worthy in showing strongly geniculate stems and mostly thinner 
leaves: Heller & Brown 5503, Ferris 1602 and 1626, and Heller 
7508. They merge into the typical condition, sometimes in the 
same collection, so that it does not seem desirable to consider them 
as varieties. Suksdorf 480 from Washington and Wooton 28 from 
New Mexico are glabrous plants, having nearly orbicular leaves 
and an almost entire margin. 
17a. Var. insignis (Greene) Grant, comb. nov. 
ion - guttatus var. insignis Greene, Manual Bay Region, 277. 
94, 
M. Langsdorfii var. insignis Greene in Jour. Bot. 33: 7. 1895; 
Jepson, Fl. W. Mid. Calif. 407. 1901, and ed. 2, 379. 1911. 
