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 si folium. The corolla, when fully 

 expanded, is flat, 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). 



S. mcllilulnm Rose in Contrih. 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 flatfish 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-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 implies {mellitulus =\itt\e darling). It 

 appears to prefer half shade to full sunlight, and dries up easily. 



51. Sedum Cockerellii Britton (fig. 71). 

 S. Cockerellii Britton in Bulletin New York Bot. Gard., 3, 41, 1903. 

 "N. Amer. Flora," 22, 67. Cockerell in Gard. 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. 



