GRANT—A MONOGRAPH OF THE GENUS MIMULUS 345 
An interesting plant, closely related to M. parviflorus, has been 
collected on Santa Cruz Island by Mrs. C. E. Miller and A. L. 
Grant 1703 and 1704. А single specimen first came to the 
author's notice in a collection of Mimulus borrowed from the 
California Academy of Science. In July, 1923, there was an 
opportunity to go to Santa Cruz Island to look for this plant. 
It was found to be fairly common on the open hillsides near Friar's 
Harbor and Valdez, occurring, however, only where M. parviflorus 
and M. longiflorus grew near each other. Тһе color varied from 
the deep red of M. parviflorus to the clear yellow of M. longiflorus. 
The shape and size of the calyx and corolla and the leaf characters 
exhibited all possible combinations of the characters of the two 
above-mentioned species, so it seemed probable that the plants 
under consideration were natural hybrids. Typical material of 
M. parviflorus was found to be abundant in the canyons, whereas 
typieal M. longiflorus occurred only on the open hillsides. Crosses 
are being made between these several plants, and it is hoped to 
eng experimental proof of the parentage of the apparent 
ybrid. 
DOUBTFUL AND LiTTLE-KNOWN SPECIES 
M. albus Dougl. Jour. 150. 1914. 
Stem 10-15 cm. high; leaves sessile, linear-lanceolate, minutely 
dentate; flowers small, white, tube yellow. 
Collected by Douglas on the shores of the Columbia River. 
This probably is an albino form of M. breviflorus or of one of 
the species closely allied to it. 
M. glandulosus Lehm. Del. Sem. Hort. Hamb. 7. 1830; 
Linnaea 6: Litt. 11. 1831; Walp. Rep. 3:276. 1844—45. 
À glandular-pubescent annual with procumbent stems; leaves 
broadly ovate, dentate, pale green; pedicels shorter than the 
leaves; flowers small. 
Indigenous to North America. It evidently is closely related 
to M. glabratus and may be a pubescent form of that species. 
M.lanatus Dougl. Jour. 122. 1914; Loudon in Hort. Brit. 251. 
1839, not, Pursh (inadequately described). 
