1924] 
GRANT—A MONOGRAPH OF THE GENUS MIMULUS 347 
HYBRIDS 
Mimulus was very popular in horticulture during the middle 
part of the nineteenth century. The ease with which hybrids 
could be obtained and the great variety of color-forms which 
resulted made it a desirable group for experimental purposes. 
The most common parents were M. luteus and its varieties 
rivularis and variegatus of the section Simiolus, M. cardinalis and 
M. Lewisii of the sections Erythranthe and Paradanthus, and 
M. glutinosus and M. puniceus of the section Diplacus. Numer- 
ous hybrids were produced and these were crossed and recrossed, 
80 that it is impossible to tell the parentage of most of the present 
garden forms. It is interesting to note that no hybrids were ге- 
corded from crosses made between members of the section Dip- 
lacus and any other section. The following is a list of the more 
common hybrids which have been described and pictured in 
various floral magazines. Many of them are still being culti- 
vated, 
M. cornation Rivoire in Rev. Hort. 93: 355. 1921. 
Corolla velvety-red, throat yellow. Derived from M. cupreus. 
M. Bartonianus Rivoire in Rev. Hort. 93: 356. 1921. 
Flowers rose-red, throat yellow spotted with brownish-red. 
Hybrid between M. cardinalis and M. Lewisii. 
M. duplex Hort. ex Wettst. in Engl. & Prantl, Nat. Pflanzenfam. 
4:72. 1801. 
M. Elphinstonea in Fl. Mag. 4: 144. 1836. 
The colored plate shows the plant to have yellow corollas, each 
lobe of which is deeply edged with crimson. Parentage not given. 
M. Forsythiana in Fl. Mag. 3: 216. 1835. 
Flowers pale-sulphur with rosy-crimson spots. This hybrid 
Was raised by J. Forsyth, of Anlaby, near Hull. Parentage not 
Elven, 
M. Harrisonia Paxt. in Paxton’s Mag. Bot. 4:173. 1838. 
Corolla reddish-pink with lines of reddish-brown spots down 
the throat below each lobe, lobes not reflexed. This is a hybrid 
ееп M. cardinalis and M. roseus. 
