ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 213 

 Flowers April (cold frame) ; May-June (in the open). Hardy in 



all mild areas in the British Isles. ^ ' . ^, ^Ur Mpviro 



Habitat -Not certainly known, but undoubtedly Mexico. 

 Described by Hemsley forty years ago from English garden specimens 

 labelled S. spathulifolium, and still found in Enghsh gardens. I 

 have had it from nearly a dozen different sources, labelled confusum 

 dendroideum, or fraealium. Apparently not in cultivation m America, 

 nor as yet re-collected in Mexico. ^ ■ ^ +1,0 



It is the hardiest of the dendroideum group, and survived the 

 severest Dublin winters which killed out S. praealium almost entirely. 

 Tplant received from La Mortola as " sp. Mexico" is a large 

 form with longer branches, and leaves li to 2 inches long and pro- 

 po^i'onately broad. In flower it is identical with the type. Otherwise 

 I have seen no variation in the species. 



97. Sedum amecamecanum Praeger (fig. 122). 

 S. amecamecanum Praeger in Journ. of BoL, 54. 44. I9i7- 



A member of the sub-shrubby, flat-leaved section of Mexican 

 Sedums. easily distinguished from the dendroideum ^on^ {dendroideum, 

 Sraealtum. confusum) by its much smaller size and pale buff-yellow 

 flowers; and from the rest of the section by its oblanceolate (not 

 spathulate) leaves, &c. 



DESCRIPTION -A small, erect, glabrous, evergreen sub-shrub 6 inches or more 

 in heSt "Jm smooth, round, with wide-spreading branches, bare below 



spreading snortiyspu , f longest sepal. Stamens yellow. 



^Sretdh^r * the netafs ScJSshort. squarish, emarginate. deep orange above 

 Sth a whitish bScar/>./s erect, tajering. equalling the stamens, greenish 

 yellow, styles slender, slightly spreading, orange-yellow. 



Flowers May (cold frame). Not hardy at Dublin, but hardy at 

 Rostrevor. a very mild spot. 



Habitat.— Amecameca, Mexico. 



Sent to Wisley from Washington unnamed under the number 

 ^, having been collected by C. A. Purpus in 1906 (No. 108). 



98. Sedum pachyphyllum Rose (fig. 123). 

 S. pachyphyllum Rose in "Contrib. U.S. Nat. Herb.." 18, 299, iQ"- 



Illustration.— Loc. cit., pi. 58 (photo). 



A large very thick-leaved Sedum most resembling 5. allantoides 

 and to a less degree S. Treleasei ; from the latter it can be at once 

 separated by its terete, not fiat, leaves. In flower, its dense, flatfish 



