ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 135 
Flowers February-March (gentle heat), March-April (cold frame). 
Not hardy. 
Habitat. — Mountains of North-Western Mexico. 
The stems of alamosanum arise in autumn or winter, grow erect 
and unbranched till the following autumn, when they become straggling 
and branch slightly at various points, each branch bearing in the fol- 
lowing spring a few flowers at its summit ; the stems die after flowering. 
In these respects they are closely paralleled by those of the green- 
leaved and yellow-flowered S. diver sifolium. The corolla, when fully 
expanded, is fiat, and with the equally long and similarly coloured 
calyx, gives the effect of a ten-petalled pale-reddish flower. 
Received from the Botanic Gardens of Washington and New York, 
also from the Edinburgh and Cambridge gardens in Great Britain. 
Named after the Alamos Mountains, Sonora, Mexico, where it was 
first collected. 
50. Sedum mellitulum Rose (fig. 70). 
5. mellitulum Rose in Contrib. U.S. Nat. Herb., 13, 299, 1911. 
Illustration. — Loc. cit., pi. 57 (photo). 
A neat little plant, easily known by its tuft of erect stems a few inches 
high, clothed with linear leaves and terminating in a flattish cyme of 
white flowers. For some years confused in America with 5. alamo- 
sanum, but that has shorter, more glaucous leaves and few-flowered 
cymes with bright-red buds and pale-reddish flowers ; it flowers, more- 
over, in early spring, while 5. mellitulum blooms in autumn. 
Description. — A small, slender glabrous tufted perennial, without barren 
shoots. Stems lengthening in spring from short autumn shoots and dying after 
fruiting, slender, terete, reddish, rough with minute papillae, 3-4 inches high, some- 
times slightly branched. Leaves alternate, green, ultimately reddish, linear- 
subulate, blunt, terete, slightly spurred, J-| inch long, set at right angles to the 
stem ; young leaves glaucous, densely papillose. Inflorescence flattish, 1-2 inches 
across, of 2-3 wide-spreading simple or forked branches with flowers in the forks. 
Buds ovate, pointed, ribbed, enclosed and exceeded by the cup-shaped calyx. 
Flowers nearly | inch across ; pedicels slender, shorter than the flowers. Sepals 
green, resembling the leaves, wide-spreading, slightly spurred, separate to the 
base. Petals clear white, ovate, acute, greenish on back, equalling or slightly ex- 
ceeding the sepals. Stamens nearly equalling the petals, wide-spreading, filaments 
white, anthers crimson. Scales short, cuneate, retuse, tipped orange. Carpels 
white, erect, slightly shorter than the stamens, styles divergent. 
Flowers September-October. Not hardy. 
Habitat. — Sierra Madre, Mexico. 
A pretty plant, as its name impHes [mellitulus darling). It 
appears to prefer half shade to full sunlight, and dries up easil3\ 
51. Sedum Cockerellii Britton (fig. 71). 
S. Cockerellii Britton in Bulletin New York Bot. Card., 3, 41, 1903. 
"N. Amer. Flora," 22, 67. Cockerell in Card. Chronicle, 25 Jan. 
1919. 
A small, pale-green plant, recognizable among the white-flowered 
Mexican species by its flat, spathulate pointed root-leaves, narrowly 
lanceolate stem-leaves, linear sepals, and lanceolate petals. 
