REVISION OF THE GENUS CEREUS MILL. 65 



Cerens Celsianus A. Berg. (= Pilocereus Celsianus 

 Lem.) is a very stately plant, stout and vigorous, covered 

 with long white hairs. There exist many varieties of it, 

 chiefly differing in the spines and the more or less dense 

 covering of hairs. It is quite hardy on the Eiviera. 

 There is a fine plant at La Mortola, from which the flower 

 represented in plate 2 has been drawn. 



It is very likely that the old Cereus lanatus P. DC. 

 (Cactus lanatus HBK.) is also an Oreocereus. It has 

 never flowered in Europe, and from the original descrip- 

 tion this is not quite evident* It is much grown in gardens 

 as Pilocereus Dautwitzii Fr. A. Haage, and is a very fine 

 plant, densely involved in long white hairs. 



VI. LEPIDOCEREUS Engelm. Syn. of the Cact. of the 



Terr, of the U. S. etc. Proc. Am. Acad. 3. (1856) ; 

 Coll. Works. 140. 



Flowers rather large, white; ovary oblong, with deltoid imbricated 

 scales bearing in their axils very little short wool, and sometimes a lew 

 deciduous bristles; tube funnel-shaped with similar but gradually in- 

 creasing scales, the inferior only woolly; sepaloid perianth leaves obo- 

 vate, obtuse, green, petaloid ones white, recurved spatulate and very 

 obtuse or notched; filaments very numerous, shorter; style with 12- 

 18 stigmata. Fruit obovoid or pear-shaped, with small and remote 

 deltoid scales, in their axils scarcely woolly, dried remains of the flower 

 deciduous; pulp red; seeds small, very numerous, shining, black. 



Cerens (Lepidocereus) giganteus Engelm. 1. c. 76. — Arizona, Sonora, 



etc. 



Enorelmann states that Cereus chilensis Colla 

 to his subgenus Lepidocereus, but according 

 scription of this species given by Schumann 



chocereus. 

 The su 





En 



also C. Thurberiy which I include under Pachycereus. 

 There is no other Cereus known to me of which the 

 flowers and fruits resemble those of C. giganteus. 



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