52 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
while in S. tiheticum they are quite smooth and the leaves often 
somewhat glaucous. The few plants of both species which I have 
Fig. 1 8. — S. himalense Don. 
seen were not hard to distinguish, but Hooker states that in the 
Himalayas these and the other native Rhodiolas vary much in almost 
every character, so from a few specimens one cannot dogmatize 
about them. 
