HOKZICAOTS. 



161 



Plants small, procumbent or ascending, 2 t<> 6 dm. long, 3 ti> ,s cm. in diameter; ribs 18 to 20, 

 low; areoles approximate; spines bright yellow, numerous, acicular, i cm. long or less; Bower-buds 

 covered with white wool or hairs; flowers near the end of the branches, 7 to S cm. long, pinkish to 

 orange; flower-tube naked at base; perianth-segments oblong, acute, apiculate; scales on the ovary 

 and flower bearing long white and brown hairs in their axils. 



Type locality: Xear Nabon, Ecuador. 



Distribution: In the vicinity of Nabon, Ecuador. 



This species has long been a puzzle and so far as we know the only record of its having 

 been previously collected is that of the type at Nabon. Dr. Rose visited Nabon in 1918, 

 where he found this species very abundant on the dry hills. Its range is very circumscribed, 

 for it does not extend very far either north or south of Nabon. It is readily distinguished 

 from the other species of the genus seen in Ecuador in its very dense mass of short yellow 

 spines and its larger lighter-colored flowers. These flowers are very attractive and it is 

 to be hoped that some of the living material sent to New York may produce flowers. The 

 plants, however, had to be carried for a long distance by pack train before being shipped to 

 New York and did not arrive in very good condition. Dr. Rose's plant from Nabon was 

 collected September 25, 1918 (No. 23029). We have tentatively referred here his plant 

 from Tablon de Ona, collected September 27, 1918 (No. 23130), but it has smaller flowers. 



Illustration: Schumann, Gesamtb. Kakteen f. 21, as Cereus isogonus. 



Fig. 230. — Borzicactus morleyanus. 



Fig. 231. — Borzicactus morley: 



4. Borzicactus acanthurus (Vaupel). 



Cereus acanthurus Vaupel, Bot. Jahrb. Englcr 50: Bcibl. Ill: 13. 1913. 



Plants low, spreading and procumbent, with the tips ascending, sometimes sprawling over the 

 edge of a cliff, with long hanging branches, 1 to 3 dm. long and 2 to 4 cm. in diameter; ribs 15 to 

 18, very low, rounded, separated by narrow acute intervals; areoles small, approximate; flowering 

 areoles producing tufts of white wool about the flowers; flowers scarlet; tube slender, straight or 

 a little curved, 4 to 5 em. long; limb about 2.5 cm. broad; inner perianth-segments spreading, acute; 

 filaments white below, scarlet above; style rose-colored, longer than the filaments; stigma-lobes 

 green; fruit globular, 2 cm. in diameter. 



Type locality: Matucana, Peru. 



Distribution: On the low hills and in the narrow valleys near Lima and along the 

 Rimac River to the east of Lima. 



