TRICHOCEREUS. 143 



central spines several, the longest nearly 10 cm. long; flowers very large, funnelform, very fragrant, 

 showy, 15 cm. long; scales on flower-tube ovate, acuminate, bearing long hairs in their axils; inner 

 perianth-segments white, oblong; fruit globose to ellipsoid, splitting on one side. 



Type locality: Not cited, but doubtless Mendoza, Argentina. 



Distribution: Mendoza and northward, Argentina, 



Schumann describes 3 varieties, all apparently from Mendoza, which we have merged 

 into the species. Plants as seen in the field show even greater variation than is called for 

 in Schumann's descriptions, but they all evidently grade into one another. 



Cereus montezumae Hortus (Pfeiffer, Enum. Cact. 91. 1837, as synonym), C. dumes- 

 nilianus Haage (Schumann, Monatsschr. Kakteenk. 4: 172. 1894, as a probable variety of 

 C. candicans}, C. dumesnilianus Monville (Weber, Diet. Hort. Bois 279. 1894, as synonym), 

 Echinopsis dumesniliana Cels (Schumann, Gesamtb. Kakteen 69. 1897, as synonym; C. 

 candicans dumesnilianus Zeissold, Monatsschr. Kakteenk. 3: 140. 1893), and Echinoce- 

 rcus candicans tenuispinus Pfeiffer (Forster, Handb. Cact. ed. 2. 833. 1885) are usually 

 referred here. Echinocactus candicans (Pfeiffer, Enum. 91. 1837) is a synonym only. 



Cereus candicans spinosior Salm-Dyck (Walpers, Repert. Bot. 2:276. 1843), unde- 

 scribed, belongs here. 



Schumann refers Echinocactus auratus Pfeiffer (Abbild. Beschr. Cact. 2: under pi. 14. 

 1846 to 1850) and its synonym Echinopsis aurata Salm-Dyck (Cact. Hort. Dyck. 1849. 39. 

 1850) to Cereus candicans, but this can not be, for the descriptions are very different. The 

 former was described as depressed, 12 to 15 inches in diameter, only 4 to 5 inches high, and 

 with 28 ribs. The type locality was Bellavista, Chile. It should be compared with 

 Eriosycc sandillon and its relatives.* Echinopsis dumcliana Cels (Salm-Dyck, Cact. Hort. 

 Dyck. 1849. 39. 1850) is given as a synonym only; it is doubtless the name referred to by 

 Schumann, but with different spelling. 



Figure 195 shows a flower collected by Dr. Rose near Cordoba, Argentina, in 1915. 



17. Trichocereus strigosus (Salm-Dyck). 



Cereus strigosus Salm-Dyck, Hort. Dyck. 334. 1834. 

 Cereus intricatus Salm-Dyck, Cact. Hort. Dyck. 1849. 194. 1850. 

 Echinocereus strigosus Lemaire in Forster, Handb. Cact. ed. 2. 826. 1885. 

 Echinocereus strigosus spiiwsior Riimplcr in Forster, Handb. Cact. ed. 2. 827. 1885. 

 Echinocereus strigosus rufispinus Riimpler in Forster, Handb. Cact. ed. 2. 827. 1885. 

 Echinocereus intricatus Riimpler in Forster. Handb. Cact. ed. 2. 830. 1885. 

 Cereus strigosus intricatus Weber in Schumann, Gesamtb. Kakteen 68. 1897. 

 Cereus strigosus longisphius Maass, Monatsschr. Kakteenk. 15: 119. 1905. 



Cespitose, forming clumps 2 to 10 dm. in diameter, the branches usually simple, erect, or ascend- 

 ing, sometimes 6 dm. high, 5 to 6 cm. in diameter, very spiny; ribs 15 to 18, very low, 4 to 5 mm. 

 high, obtuse; areoles circular, rather large, approximate, 4 to 8 mm. apart, densely white-felted when 

 young; spines numerous, very variable as to color and length, either white, yellowish, or pinkish to 

 nearly black, i to 5 cm. long, acicular; flowers white, large, 20 cm. long, funnelform, the scales on 

 the ovary and tube with long silky hairs in their axils; seeds black, glossy, about 2 mm. long; hilum 

 basal but oblique. 



Type locality: Not cited. 



Distribution: Western Argentina. 



This species is very common in the deserts of the Province of Mendoza, especially 

 about the city of Mendoza, and in the mountain valleys farther to the west. The first 

 specimens were doubtless sent out through Chile, for before the railroads this was the most 

 accessible route out from Mendoza. 



Cereus myriophyllus Gillies (Allg. Gartenz. 1:365. 1833), given by Schumann as a 

 synonym of this species, was never described and the name was referred here originally with 



* We have found that Echinocactus ceratistes Otto, one of the synonyms of Eriosyce, originally came from Bella- 

 vista, Chile, also. 



