i 4 4 



THE CACTACEAE. 



doubt. C. strigosus spinosior Salm-Dyck (Cact. Hort. Dyck. 1844. 27. 1845) and C. 

 strigosus rufispinus (Monatsschr. Kakteenk. 7: 184. 1897) also belong here, and, per- 

 haps, C. spinibarbis flavidus (Labourer., Monogr. Caet. 325. 1853). 



Illustration: Rep. Mo. Bot. Gard. 16: pi. 8, f. 1, as Cereus strigosus. 



Figure 21 1 is from a photograph taken by Dr. Shafer at Andalgala, Argentina, in 19 16. 



*:/# 



18. Trichocereus shaferi sp. nov. 



Cespitose, cylindric, 3 to 5 dm. high, 10 to 12.5 cm. in diameter, light green; ribs about 14, 10 

 to 15 mm. high; areoles approximate, 5 to 7 mm. apart, white-felted when young; spines about 10, 

 acicular, 12 mm. long or less, light yellow; flowers from the top of plant, 15 to 18 cm. long; tube 

 slender ;' outer perianth-segments linear; inner segments probably white; scales of the ovary and 

 flower-tube bearing long brown hairs. 



Collected by J. A. Shafer in wooded ravine, altitude 1,800 meters, near San Lorenzo, 

 Salta, Argentina, January n, 1917 (No. 44). 



19. Trichocereus schickendantzii (Weber). 



Echinopsis schickendantsii Weber, Diet. Hort. Bois 473. 1896. 

 Plants simple or cespitose, slender, 15 to 25 cm. high, 6 cm. in diameter, dark green, shiny; 

 ribs 14 to 18, low, 5 mm. high, somewhat crenate; spines yellowish, flexible, 5 to 10 mm. long; radial 

 spines at first 9, in age more numerous ; central spines 2 to 8 ; flower-bud pointed, covered with black 

 wool; flowers funnelform, several from the top of the plant, inodorous, 20 to 22 cm. long; scales on 

 the ovary and flower-tube with hairy axils; inner perianth-segments acute, oblong, white; fruit 

 edible, agreeable. 



Type locality: Tucuman, Argentina. 



Distribution: Northwestern Argentina. 



Spegazzini thinks it is not an Echinopsis but a Cereus, although he leaves it under the 

 former genus. The flowers are not those of a true Cereus. 



Weber (Diet. Hort. Bois 473. 1896) gives Cereus schickendantzii Weber as a synonym. 



Illustration: Monatsschr. Kakteenk. 15: 125, as Echinopsis schickendantzii. 



