174 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



filaments white, anthers purple. Scales white, emarginate, longer than broad. 

 Carpels erect, shorter than the stamens, white, later reddish and slightly spreading ; 

 in fruit bright red, wide-spreading. 



Flowers July. Apparently hardy throughout the British Isles. 

 Habitat. — Real de Moran, South Mexico. 

 The name is derived from the type locality. 



Var. arboreum Praeger. 



5. arboreum Masters in Gard. Chron., 1878, ii. 717. 

 S. moranense H. B. K. var. arboreum Praeger in Journ. of Bot., 55, 

 211, 1917. 



Stem erect, much-branched, fastigiate, and often fasciate at the 

 tips; a little upright bush 6-11 inches high, the stems sometimes as 

 much as \ inch thick. 



The type as found in gardens is somewhat variable in habit and 

 stoutness. Occasionally the leaves are arranged in five spiral rows, 

 which gives the plant an unfamiliar appearance. It varies much 

 also as regards fioriferousness. 



The variety is very distinct in habit. Dr. Masters, when working 

 at the genus Sedum, found this erect form in various gardens labelled S. 

 arboreum or arbor escens, and described it [lac. cit.) as a new species under 

 the former name. It has evidently been in cultivation for a long time, 

 and was one of the earliest known of Mexican Sedums. A fine specimen 

 of it in the Kew herbarium, 9 to 11 inches in height, collected by 

 C. E. Pringle at 10,000 feet in the Sierra de Pachuca, shows that var, 

 arboreum is a native Mexican form. 



74. Sedum Liebmannianum Hemsley (fig. 95). 



S. Liebmannianum Hemsley, "Diagnoses Plant. Nov.," 1, 12, 1878. 

 Hemsley, "Biol. Centr. Amer., Bot.," 1, 396. Rose in "Contrib. 

 U.S. Nat. Herb.," 13, 299, 191 1. 



Synonym. — 5. moranense Britton and Rose in " N. Amer. Flora," 28, 63 

 (not of H. B. and K., see p. 171). 



Illustration. — Rose, loc. cit., pi. 56 (photo). 



There has been confusion regarding this plant, arising from its 

 similarity in some points to S. moranense H. B. K. Hemsley, in his 

 original description {loc. cit. 1878), does not refer to the most striking 

 character of the plant, namely the persistent white inflated bases 

 of the withered leaves, which give it a very distinct and peculiar 

 appearance. Hemsley's type specimens at Kew (Yavesia, Oaxaca, 

 7,500 feet, Liebmann [1841-43]) are now in very poor condition, but 

 nevertheless this character is apparent. 



Two years later, in Gard. Chron., 1880, ii. 38, Hemsley published 

 a fresh description " enlarged from the living plant at Kew," but the 

 living plant in question was not Liebmannianum, but moranense, as 

 shown by the type specimen of this description (so labelled by N. E. 



