ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 21 
The notes on synonymy which follow are limited to names still 
sometimes used in gardens for the plants in question. 
Then follow references to published figures of the plants. These, 
Uke the references mentioned above, have all been verified by 
consultation of the original works, and they include only useful 
illustrations : poor figures are not referred to. 
There follow notes pointing out the distinctions between the 
species under notice and its nearest allies. These together with the 
figure will in most cases be sufficient to identify any plant. 
A tolerably full description of each species is then given, taken 
in almost every case from the living plant and afterwards checked by 
comparison with descriptions in the leading floras. In every case 
where I saw a living plant at all I was able also to grow it, mostly for 
several years, and could observe it at all seasons. In the case of 
plants certainly in cultivation which I did not succeed in seeing (4 out 
of 151 species described in the paper), the descriptions are quoted 
from an authority which is named. 
Descriptions of varieties are added, and miscellaneous notes 
relating to the plant in its native or cultivated state, and to the 
sources from which it was obtained. 
PART II.— DESCRIPTIVE. 
IX. Characters of the Genus. 
Sedum Linn. 
Linnaeus, " Genera Plantarum," No. 579. De Candolle, " Memoire sur la 
famille des Crassulacees," 1828. Ibid., Prodromus, 3, p. 401. Bentham and 
Hooker, " Genera Plantarum," 1, p. 659. Schonland in Engler and Prantl, 
" Naturliche Pflanzenfamilien," III. 2a, p. 29. Dalla Torre and Harnes, 
" Genera Siphonogamarum," p. 197. 
Succulent plants, mostly perennial, very rarely hairy. Leaves 
flat to cylindrical, entire or nearly so, usually alternate, rarely opposite 
or verticillate. Inflorescence usually cymose. Flowers usually bisexual 
(rarely unisexual by abortion), and 5- (sometimes 4-, rarely 3-, 6-, or 7-) 
parted, white or yellow, more rarely red or purple, very rarely 
blue. Sepals, petals, and carpels equal in number, stamens twice 
as many (very rarely equalling them in number). Sepals often fleshy 
and leaf-like. Petals separate to the base, or nearly so. Stamens 
free, or those opposite the petals adnate to them in the lower portion. 
Hypogonous scales small, entire or shghtly toothed. Carpels separate, 
or nearly so. Follicles almost always many-seeded. 
Most of the genera of Crassulaceae have rather indefinite boundaries, 
and the present genus is no exception. There is a difficulty about 
deciding on the best fine to be drawn between Sedum and Crassiila, 
Cotyledon, and Sempervivum. This is especially felt in the case of 
many of the species discovered in recent years in Mexico and the 
