ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 67 
rootstock ; barren stems none. Leaves crowded, 1-2 inches long, green, 
linear, entire, flat, and channelled above, rounded below, sessile, blunt, -^^^ inch 
or more broad. Inflorescence dense, racemose, 1-3 inches long by about 
I inch across. Buds ovate-oblong, blunt. Flowers greenish-white, | inch long, 
lower shortly pedicelled, upper sessile. Sepals greenish, hnear, acute, widening 
at the base, much exceeding the tube. Petals greenish-white, lanceolate, blunt, 
keeled, spreading but not widely, i J times the sepals. Stamens erect, equalling 
the petals, filaments white, anthers reddish. Scales small, quadrate. Carpels 
erect, slender, greenish-white, at first equalling the petals ; large and often 
flushed red in fruit. 
Flowers June- July. Hardy. 
Habitat. — Turkestan. 
Rather rare in cultivation. I have it from Berlin, Kew, Edinburgh, 
and from several private collections ; and Mr. G. Reuthe offers the 
true plant. Its name commemorates P. Semenow, Central Asian 
traveller. 
19. Sedum rhodanthum A. Gray (fig. 28). 
5. rhodanthum A. Gray in Amer. Journ. Science, Ser. 2, 33, 405, 
1862. S. Watson, Bot. of Nevada, Utah and Colorado," loi, 
1871. Masters in Gard. Chron., 1878, ii. 267. 
Synonym. — Clementsia rhodantha Rose in Bulletin New York Bot. GarJ., 
8, 3, 1903. "N. Amer. Flora," 22, 29. 
A species remarkable on account of its abnormal inflorescence, 
which forms a dense raceme, very unusual in the genus. The only 
Sedum which resembles it is 5. Semenovii from Turkestan, in which, 
however, the flowers are greenish-white and the leaves linear and 
entire, while in rhodanthum the flowers are normally rose-coloured, 
and the leaves are narrowly oblanceolate, and usually toothed near 
the apex. Other differences will be seen from a comparison of figs. 
27 and 28. 
Description. — An erect glabrous herbaceous perennial. Rootstock thick, 
somewhat branched, resembling that of 5. roseum, except that the withered 
straw-like bases of the old stems are persistent. Stems usually several from 
the summit of the rootstock, erect, smooth, round, unbranched, very leafy, 
about a foot high. Leaves alternate, sessile, linear-oblanceolate, acute, flat, 
rather fleshy, green, ascending, entire or obscurely toothed near the apex, i 
inch long by \ inch wide, smaller below, bearing a median furrow on the face. 
Inflorescence a dense raceme 1-3 inches long by about an inch across. Buds 
lanceolate with spreading sepals. Flowers short- stalked, ^ inch long. Sepals 
green or flushed red, erect, long, tapering, acute. Petals erect, slightly exceed- 
ing the sepals, lanceolate, acute, longitudinally folded, rose-coloured. Stamens 
erect, equalling the sepals, the epipetalous ones inserted half-way up, filaments 
green, anthers red. Scales short, yellow, roundish, spreading. Carpels pink, 
erect, equalling the stamens, erect in fruit ; styles short. 
Flowers June. Hardy. 
Habitat. — Meadows and streamsides in Rocky Mountains, 
Arizona to Montana. 
Rare in cultivation. In gardens I have seen it only at Kew, and 
from the nursery of Messrs. Ware at Feltham ; and a good gathering 
of the plant came to me from Boulder, Colorado, under the name 
Rhodiola integrifolia. The name rhodanthum is descriptive of its red 
flowers (which, according to American botanists, vary into white). 
