86 Alpine Plants. 
easy plant to keep “in situ” through a damp winter. 
It succeeds well if planted in comparatively shallow 
soil, on the very dry bank of a knoll of rockwork, 
over which the branches are able to droop down 
and the wood get well burnt up in summer and 
so thoroughly ripened. 
Opuntia bicolor (Hab. ”). 
Plant in a cleft between stones backed by a 
rock-face, which should, if possible, overhang the 
chosen site, in limestone and loam. In planting, 
first jam a little clay right to the back of the cleft, 
then plant the Opuntia in this, and finally wedge the 
plant tightly in position by means of stones plugged 
in above and below it. In spring and autumn, again 
make the plant firm if at all loosened by the leverage 
of its heavy growths. In autumn, limestone in from 
lin. to din. cubes, with the dust retained, should be 
thrown over the surface, so that it is washed down 
about the roots. 
Opuntia brachyarthra flava (Hab. ?). 
Opuntia camanchica rubra and c. salmonea (Texas, Colorado, 
etc.). 
Opuntia rhodantha (Colorado). 
Opuntia Tuna (West Indies). 
Treat all these like Opuntia bicolor. 
Orchis foliosa (Madeira). 
Plant in a well-drained, shady position on the 
flat facing north, in strong fibrous red limestone 
loam if this can be obtained, but, if not, the plant 
can be grown with fair success in good strong 
