34 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
2. Sedum heterodontum H. f. and T. (fig. 7). 
5. heterodontum Hooker fil. and Thomson in Journ. Linn. Soc, Bot., 
2, 95, 1858 ; Clarke in Hooker, " Flor. Brit. India/' 2, 417. 
A plant of very distinct appearance, but the similarity of its 
floral parts to those of S. roseum may eventually place it as a variety 
of that pol3miorphic species, as suggested by Hooker and others. 
Easily identified among the species of the Rhodiola section by its 
very short, broad, sessile, coarsely-toothed leaves, scattered along 
tall stems, i-ij foot high. 
Description. — A dioecious herbaceous perennial. Rootstock thick, elongate, 
aerial, occasionally branched, similar to that of S. roseum. Stems annual, several 
together from the summit of the branches of the rootstock, erect, i-i^ foot 
high, smooth, green, round, unbranched, leafy throughout. Leaves alternate, 
triangular to ovate, from a clasping base, coarsely toothed, fleshy, flat, \-l inch 
long by about \ inch broad, green or glaucous, loosely disposed on the stem. 
Inflorescence terminal, dense, about an inch across, not leafy, branches very 
short. Flowers 4-merous, on very short pedicels. Male flower : — J— f inch 
long ; sepals linear, blunt, distant, greenish ; petals linear, blunt, yellowish or 
reddish, times the sepals, spreading; stamens wide- spreading, slightly exceed- 
ing the petals, filaments streaked red, anthers buff flushed red ; scales large, 
half as long as the carpels, oblong or quadrate, emarginate, bright red ; carpels 
erect, blunt, linear-oblong, much shorter than the stamens, equalUng the sepals, 
about twice the scales, greenish. Female flower : — petals and sepals similar, 
of about the same length, linear, blunt, green or purplish, erect ; scales oblong, 
orange, 2-3 times as long as broad, half the petals ; carpels large, 1^—2 times the 
petals, erect, rather oblong, green, tipped purple, styles very short. 
Flowers April-May. Hardy. 
Habitat. — Western Himalayas, 8,000-14,000 feet ; Afghanistan ; 
Tibet. 
Rare in cultivation. A handsome glaucous form has been grown 
in the rock-garden at Kew for some years. A greener form was in 
Canon Ellacombe's deUghtful garden at Bitton, and Mr. G. B. 
Milne-Redhead of Frome has sent me a less-toothed plant. I 
have not heard of it elsewhere. These plants are all females except 
that at Kew, where both sexes are represented. One of the earhest 
of the Rhodiola section, it pushes (in Dublin) sometimes as soon 
as January, and never later than March. In this respect it resembles 
5. Kirilowii, and differs from S. roseum. 
Clarke, in Hooker's " Flora of British India," describes the 
leaves as " prominently white-margined." This applies to a certain 
degree to some of the specimens in the Kew Herbarium ; none of 
the hving plants I have seen show this character. 
The specific name refers to the unequal toothing of the leaves. 
3. Sedum Kirilowii Regel (fig. 8). 
S. Kirilowii Regel in Nouv. Mem. Soc. Nat. Moscou, 11, 92, 1859. 
Maximowicz in Bulletin Acad. Petersbourg, 29, 128, 1883. 
The remarkable brownish-red flowered form of this species is one 
of the handsomest of Sedums, and is not infrequent in cultivation, 
