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THS CACTACEAE. 



8. Trichocereus macrogonus (Salm-Dyck) Riccobono, Boll. R. Ort. Bot. Palmero 8: 236, 1909 



Cereus macrogonus Salm-Dyck, Cact. Hort. Dyck. 1849. 203. 1850. 

 Erioceretis tephracanihus Riccobono, Boll. R. Ort. Bot. Palermo 8: 244. 



1909. 



cultivation often slender, bluish green 



growth • ribs usually 7, low and rounded, 1.5 cm. high, separated by acute intervals; areoles large, 

 1.5 to 2 cm. apart; spines several from an areole, acicular, brown; radial spines 5 to 8 mm. long; 

 central spine about 2 cm. long; flowers probably large and white; fruit unknown. 



Typ 



America 



York Botanical Garden by a live specimen from 



Kew, which we consider typical. Salm-Dyck described it from specimens 

 Botanical Garden at Berlin, but did not know their origin. Schumann \ 



from 



Janeiro, collected by Glaziou, and is undoubtedly Ceph 



arrabidae. 



Cereus tetracanthus Labouret (Rev. Hort, iv. 4: 25. 



tephracanihus 



Weber (Schumann, Gesamtb 



^ome from 

 came from 



Rtimpl 



are probably of this relationship; both 

 ib. Cact. ed. 2. 712. 1885) says the 



Nom 



name 



species was not described. 



called Cereus bolivianus. 



of these forms may belong the plant in the New York 

 ined from M. Simon, St. Ouen, Paris, in 1901, which is 

 name, first credited to Weber (Monatsschr. Kakteenk. 



12: 21. 



met 



hempelianus Bauer (Monatsschr. Kakteenk. 17 : 55'. 1907) is, according to F. Fobe 



only a stout, bluish-green variety of C. macrogonus. 



9, Trichocereus cuzcoensis sp. nov. 



Plants tall, 5 to 6 meters high, much branched, the 

 branches somewhat spreading, light green when young; 

 ribs 7 or 8, low and rounded; areoles rather close together, 

 I to 1.5 cm. apart; spines numerous, often 12, very stout, 

 rigid, sometimes 7 cm. long, swollen at base ; flowers 12 to 

 14 cm. long, doubtless nocturnal but, sometimes at least, 

 remaining open during the morning, fragrant; flower-tube 

 green, 5 to 6 cm. long ; inner perianth-segments oblong, white, 

 4 to 5 cm. long; filaments weak, declining on the lower side 

 of the throat; scales on the ovary and flower-tube small, 

 bearing a few long hairs in their axils; fruit not known. 



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Collected by J. N. Rose below Cuzco, Peru, 

 September i, 1914 (No. 19022). 



10. Trichocereus peruvianus sp. nov. 



Plant 2 to 4 meters high with numerous erect or 

 ascending, stout branches, 15 to 20 cm. in diameter, 

 glaucous when young; ribs 6 to 8, broad and rounded; 

 areoles large, 2 to 2.5 cm. apart, brown-felted; spines 

 brown from the first, about 10, unequal, some of them 4 

 cm. long, rigid and stout, not at all swollen at base; 

 areoles on ovary and flower-tube hairy; mature flowers 

 not seen but evidently large and probably white. 



Collected by Dr. and Mrs. Rose near Matucana 



00 meters, July 9 

 resembles T. hr 



Fig. 197. — Trichocereus peruvianus 



much 



It is found on 



from a photograph taken by Mrs. J. N. Rose at Matucana 



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