58 JOURNAL OF THE ROYAL. HORTICULTURAL SOCIETY. 
is described as having entire leaves (" foliis lineari-lingulatis in- 
tegerrimis obtusis and is clearly different ; Wallich's name crassipes 
appears to be the oldest for our plant. Hooker's Wallichianum is 
not distinct from it, being a form with leaves more divided than 
usual. The depth of the teeth varies, but I have not seen a living 
plant in which it is quite so marked as in Hooker's plate. The flowers 
vary from small and whitish (the commoner form) to larger and 
greenish, the last named approaching the variety described below. 
The flowers are almost always bisexual, but I have a male plant 
received from Glasnevin ; in it the carpels are very slender, little 
more than half as long as the stamens. 
Under certain conditions the plant will send out suckers, an unusual 
feature in the Rhodiola group, and indeed in the genus. One strong 
young plant produced a ring of stems at a distance of 6 inches from 
the branched root stock, arising from slender, branching, root-like 
underground stems emanating from the rootstock at i to 2 inches 
below the surface (fig. 2i), in this respect connecting S. crassipes with 
5. Cretini Hamet. 
Although the plant is variable, some of the forms tending towards 
the variety described below, the latter appears to merit varietal rank. 
The species takes its name from its thick rhizome. 
Var. cholaense Praeger in Journ. of Bot., 57, 50, 1919 (fig. 22). 
More robust than the type, plant of a more greyish green, inflorescence 
denser and more involucrate, the bracts being very long. Leaves i-i^ inch 
long, inch broad, largest below the inflorescence. Buds f inch long, 
equalling the pedicels. Sepals very narrow, nearly linear, green. Petals nearly 
twice the sepals, erect, green, f inch long, linear-oblanceolate, blunt. Stamens 
equalling the petals, anthers greenish. Scales dark crimson. Carpels long, 
very erect, slender, exceeding the stamens, slightly diverging above, styles very 
short ; erect and over ^ inch long in fruit. 
A fine form, easily separated by its stouter growth, longer leaves, 
and large flowers wholly green, save for the conspicuous crimson 
scales. 
Received from Lissadell nursery and seen also at Edinburgh, 
but the two had the same origin — the Chola Valley, East Sikkim, 
where the plant was collected by Cooper (No. 923). Received also, 
in the form both of roots and seeds, from Darjeeling Botanic Garden, 
presumably of the same origin. 
15. Sedum Stephani Chamisso (fig. 23). 
5. Stephani Chamisso in "Linnaea," 6, 549, 1831. Maximowicz in 
Bull. Acad. Petersbourg, 29, 127, 1883. 
A plant intermediate between two well-known species — S. crassipes 
Wallich (5. asiaticum Clarke) and 5. roseum Scopoli (5. Rhodiola 
DC). It appears to be nearer to the former, of which it should 
perhaps be considered a variety ; but as I have not had the oppor- 
tunity of studying much material, I follow Maximowicz in giving 
it specific rank. The leaves come close to S. crassipes, but are broader ; 
