Directions for Specific Culture. 123 
same compost. A compost of leaf-mould and loam 
in equal parts suits it best. If planted on the side of 
a bog it should be close under the eye, where it can 
be seen to after flowering, as, being so small, it often 
gets overrun by stronger plants and is lost. 
Viola pyrolefolia (Patagonia). 
Treat like Viola calcarata. 
Wahlenbergia Pumilio (Dalmatia). 
This is a rock plant of exceptional beauty. It 
should be planted very firmly in fissures between 
stones facing: full south, in equal parts of grit, loam, 
and sand, care being taken to leave an ample space 
behind filled in with grit and a little loam, so that the 
tender silky roots may be well protected from the 
first, and afterwards, as they grow, cling to the sides 
of their rocky nook and gather there all the moisture 
they require. Care must also be taken to see that the 
soildoes not get washed away from the plants and 
leave the roots loose. 
Wahblenbergia pumilorum (Dalmatia). 
Treat like Wahlenbergia Pumilio. 
Xerophyllum asphodeloides and a, tenax (N. America). 
Two very effective rock plants which look well 
overlooking water. Plant immediately behind a 
rock, ina rather shady but well-drained place, in deep 
peat and loam out of which the fine has been taken 
together with a little sand. Xerophyllum asphode- 
loides is the hardier, and may be placed in more 
exposed situations than X. tenax. 
