22 PRESENT-DAY GARDENING 
which is a good border Rhododendron and a most service- 
able forcer. R. chrysanthum, a native of Siberia, is a dwarf 
evergreen with the habit of R. caucasicum, and trusses 
of beautiful, golden-yellow flowers, an inch in diameter. 
Although not satisfactory in this country as a garden plant, 
it is worth the attention of breeders. There are plants of 
it in the Kew collection. Another refractory species is the 
dwarf, Myrtle-like R, lapponicum, found in North America 
as well as in the north of Europe and Asia. Finally there 
is the northern R. Kamtschaticum, with the habit of a rock- 
rose, deciduous, tongue-shaped leaves, and large, red, Azalea- 
like flowers. A child of the snows, it has never become 
established in British gardens, although it has been known 
and tried often since its first introduction about one hun- 
dred years ago. It is successfully cultivated at Kew in a 
north frame where it can be kept fairly cool in summer and 
from the effects of changeable weather in winter, though 
it is capable of withstanding any degree of cold in this 
country. It appears to be happy when planted in a shallow 
pot in sandy peat and Sphagnum-moss. The flowers are 
produced in June. The plant grows abundantly in muddy 
mountainous places in the islands and along the coasts in 
the neighbourhood of Behring Strait, extending southwards 
to Sachalin and the north of Japan and eastward to Bank's 
Island, off the coast of British Columbia. In Greenland, it 
forms dense, tufted masses, which become crimson cushions 
in June when they flower. 
