PRAEGER—SoME ASIATIC SEDUMS. 69 
retuse and only twice as long as broad, instead of thrice or more. 
The leaves are moreover opposite, not alternate as they are nor- 
mally, but the flowers are typical. A similar tendency to retuse 
apices in leaves normally of very similar shape is found in the 
Mexican S. oxypetalum, H.B.K. 
S. algidum, Ledeb. 
(1) Szechuan: Herb 6-1 ft. Flowers whitish, midst rocks 
around Tachien-lu, W. Szechuan. Alt. 13,000-14,500 ft. 9.08, 
E. H. Wilson, No. 2498. (Under S. algidum, but flowers un- 
usually small). 
(2) Yunnan : vivace, naine, fl. jaunes. Paturages du Io-chan, 
alt. 3300 m. Juin. E. E. Maire, No. 680. 1914. (A small 
form with unusually small flowers). 
(3) Yunnan: Vivace. Tiges et fleurs jaunes. Paturages de 
Ta-hai, alt. 3200 m. Juillet. E. E. Maire, No. 262/1913. (A 
large plant with the narrow leaves and long stamens of var. 
tanguticum, Maxim. but the short ovaries in the male flower of 
var. jeniseense, Maxim.) 
S. algidum, Ledeb., var. tanguticum, Maxim. 
(1) Szechuan: West Szechuan and Tibetan frontier; chiefly 
near Tachien-lu, at gooo-13,500 ft. Coll. A. E. Pratt, No. 105. 
(As S. asiaticum, DC.) (There is a sheet of the same gathering 
at Kew) 
(2) W. China: Sedum. Wet rocks, 11-12,000 feet. 7.03. 
E. H. Wilson, No. 3620. 
Sedum ambiguum, Praeger, sp. nov. (Plate clxx, 1). 
Species anomala sectionis Sedorum Genuinorum SEE Ase 3 
ato ut in Rhodiola insignis, sed caudicis apex nanus, squa- 
mosus. S. Ewersii, Ledeb. et speciebus nonnullis ali: sence 
Telephii subsimilis, sed radices non tuberosae. Foliis crassis- 
simis rosulatis, serie erectis atque staminibus quinque S. 
indico, Hamet sabsinabe. sed habitu perenni (nec bienni), sepalis 
quam petala longioribus vel ea aequantibus (nec multo breviori- 
bus), squamis nectariferis minutis Ries Te integris (nec 
amplis oblongo-quadratis emarginatis) d 
erba perennis, glabra, carnosissima, a steriles edens. 
Radices fibratae. Caudex ramosus, ramis 3-6 cm. longis, grac- 
ilibus, 3 mm. crassis, argenteis, hypogeis, decumbentibus vel 
adscendentibus. Rami steriles laterales, breves, apice folia in 
rosulas disposita ferentes. Rami orien terminales, erecti, 
simplices, graciles, sparsim foliosi, 7-10 em. longi. Folia ram- 
_ rum sterilium plana, alterna vel opposita, conferta, sessilia, in- 
