GRANT—A MONOGRAPH OF THE GENUS MIMULUS 169 
Hill near Upland, San Bernardino Co., 28 April, 1917, 7. M. 
Johnston 1204 (Pomona); near San Bernardino, May, 1894, 
Parish (Calif); borders of Warm Creek, San Bernardino 
Valley, about 900 ft. alt., 14 May, 1917, Parish 11191 (M and 
Pomona); Bluff Lake, San Bernardino Mts., 5 Sept., 1915, 
Gardner 513 (Pomona); City Creek, San Bernardino Mts., 
5 June, 1911, Parish 11311 (M and Pomona); Mill Creek 
Сайоп, San Bernardino Mts., May, 1913, Jepson 5569 (Cornell 
and M); Idyllwild, San Jacinto Mts., 5300 ft. alt., 1921, 
Spencer 1709 (Pomona); San Diego, 1874, Cleveland (M); 
borders of Cuyamaca Lake, San Diego Со., 25 June, 1903, 
Abrams 3877 (M); southwestern part of Colorado Desert, San 
Diego Co., April, 1889, Orcutt (M); meadow at Jacumba, 
San Diego Co., 13 Aug., 1917, Munz (Cornell); Del Mar, 
San Diego Co., 4 May, 1895, Angier 192 (M); San Luis Rey, 
San Diego Co., 10 May, 1882, Orcutt 134 (M); Bubbling Spring, 
Collins Valley, 28 April, 1920, Jepson 8833 (Calif.). 
Mexico: 
Lower California: near Encenada de Todas Santos, northern 
Lower California, 13 July, 1885, Orcutt (M). 
Chihuahua: near Colonia Juarez, June-July, 1899, E. W. Nelson 
6027 (С); vicinity of Chihuahua, about 4000 ft. alt., 8-27 April, 
1908, Edw. Palmer 16 (M); vicinity of Madera, about 6750 ft. 
alt., 27 May-3 June, 1908, Edw. Palmer 289 (M); vicinity of 
Chihuahua, about 4000 ft. alt., 1-21 May, 1908, Edw. Palmer 
145 (M); vicinity of Chihuahua, 8-27 April, 1908, Edw. Palmer 
17 (M); near Colonia Garcia in the Sierra Madres, 9 June, 
1899, Townsend & Barber 28 (G, М, and R. Mt.); river 
gravel, Chihuahua, 14 April, 1886, Pringle 889 (M). : 
. This species is the most common and the most polymorphic 
Ш the genus. It varies greatly with environmental conditions, 
especially in relation to the size of the stem, leaves, and flowers. 
In several experiments, plants were marked early in the season 
Which had corollas 3.5—4.5 em. long; late in the summer, flowers 
Produced on these same plants were less than half that length. 
The variety grandis of Greene is therefore considered to be a 
t response to environment, the size of the parts being 
dependent on the amount of water available or on the vitality 
of the plant. 
