124 



THE cactaceja:^. 



As understood by us this species varies greatly in the relative thickness of its branches, 

 in armament, and in the size of its flowers. Its geographical range is, in our conception, 



greater than that of most cacti. 



Cereus baxaniensis ramosus (Salm-Dyck in Walpers, Repert. Bot. 2:277. 1843) is 

 published only as a synonym. Cereus arcuatus Zuccarini (Monatsschr. Kakteenk. 14: 55. 

 1904) from its description is of this relationship. It was originally collected at Totolapa, 

 Mexico, by Zuccarini. 



Cereus bajanensis Werckle (Monatsschr. Kakteenk. 15: 166. 1905) was never described 

 but belongs here. Cereus quadrangular is Haworth (Syn. PI. Succ. 181. 181 2; C trigonus 

 quadrangular is Pfeiffer, Knum. Cact. 118. 1837; Cactus quadrangular is Loudon, Encycl. 

 PI. 412. f. 6876. 1829) may belong here, but Pfeiffer referred it with a question to Cereus 

 caripensis De Candolle (Prodr. 3:467. 1828; Cactus caripensis Humboldt, Bonpland, and 

 Kunth, Nov. Gen. et Sp. 6: 66. 1823), but this species was referred by Schumann to the 

 genus Rhipsalis. 



Fig. 184. — Acanthocereus 



in cactus plantation of Charles Deering at Buena Vista, Florida, May 1918. 



undulatus Pfeiffer (Enum 



^^'^: ^ ^-.xx^x v-^ixLtixi. ^cn^L. 1U7. 1537;, oasea on a specimen m the JJresaen 



Garden, is usually referred to Cereus acutangulus, but was not described by Pfeiffer at the 

 place here cited. 



specimen 



PI. 3: 104. 1843) and described, but should be referred elsewhere. It is of quite different 

 relationship being very slender, dull green, lo-ribbed. The flowers are large, 12.5 



diameter 



.Its native habitat is unknown. 



Journ. i: 125; Cact. Mex. Bour 

 Monatsschr. Kakteenk. 13: icg- Rev. Hort 



cm. in 



Hort. 4: pi. 140, as Cereus baxaniensis. 



Plate XVI, figure i , shows a flower and part of a joint of a 

 Botanic Garden to the New York Botanical Garden. Figure 



184; Tribune 



from 



I 



from 



> __ 





