ALPINE PLANTS. 69 
scattered amongst the rocks it will soon 
germinate, and have a good effect when the 
plants are in bloom. 
PELARGONIUM ENDLICHERIANUM (Ovtent). 
The only hardy species known; this should 
be grown on the sunniest and driest part of 
the rockery. Wedge tightly between stones 
with a compost of limestone and _ strong 
loam. Protect from rain during winter, which 
can be done by laying a stone over the place 
where it is planted. 
PENTSTEMON HUMILIS (Western North 
America). An interesting and _ beautiful 
species, and of easy culture. Very useful for 
small rockeries or the front of well-drained 
borders. South-west aspect; in light, sandy 
loam. Use a little top-dressing in the autumn 
for this. There are many other beautiful 
species and varieties well adapted for the 
rockery and of easy growth. 
PETROCALLIS PYRENAICA or DRABA PYR- 
ENAICA (Pyrenees and Alps). Purely a rock 
plant, and likes similar treatment to Dvrada 
Maweana. This should be top-dressed once 
or twice a year with fine grit worked well 
amongst the foliage; especially in the autumn 
