EASILY GROWN ROCK PLANTS 95 
to be bedded among stones, but should be given a soil of 
loose, fibrous nature that will hold by absorption a great 
deal of water. Here the plants grow luxuriantly, and 
make thick, substantial rhizomatous stems. The proper 
season for planting Mimulus is in spring, and at the approach 
of winter the plants should be cut back close to the ground 
and a mulching of sifted soil and sharp sand in equal 
part spread over the rhizomes. With this perfectly 
simple treatment the perennial species and their varieties 
and hybrids may be depended upon to pass safely through 
an ordinary winter, and break afresh into strong growth 
at the return of spring. 
M. alpinus, brownish crimson in the type, has dazzlingly 
brilliant varieties, under such names as Crimson King, 
Brilliant, Corallina, etc. Coronation is the name of one 
of the latest introductions, and it is a real gem that is of 
intense velvety crimson. 
The Maculosus hybrids give us the handsomely spotted 
and blotched large-flowered varieties. Chalk Hill Giant 
is the name given to a strain of immensely large-flowered 
varieties in a remarkably varied and wonderful range of 
rich colourings. M. luteus is the common, erect-growing, 
yellow species that may frequently be found luxuriating at 
the margins of water. M. ringens is also yellow, but the 
ground colour is thickly spotted with brown. M. cardi- 
nalis is brilliant red, erect growing, the height varying 
according to position and moisture, from I to 3 feet. 
Many seedling forms varying widely in colour may be 
had in the cardinalis type, and it is well worth while raising 
a batch of seedlings to form a spreading mass of riotous 
