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 ^ 



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 -^i 



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li 



C^REUS. 



9 



which measured more thai 

 ing at night; the perianth 



19 cm 



from 



persistent. The woody trunk may be 6 dm. in diameter 



The flowers are large and white, open- 



ovary, leaving the style, which is 



frames, etc., are sawed from 



most of the smaller 



mandacaru 



from this cactus, wliich is called man 



The specific name iamacaru, said bv some 



times 



name of the plant in Brazil, is doubtless a corruption of mandacaru 

 >lanted about country houses, often as a kind of hedere. In times of \ 



some 



farmers cut off the young branches from these cacti to feed to their cattle. 

 Cereus horridus Otto (Pfeiffer, Allg. Gartenz. 5:370. 1837) and C. thalassimis Otto 

 Dietrich (Allg. 



Schumann 



from La 



Cereus lividus was based upon a Brazilian species. Two years after it was described. 



Guayra is doubtless C. hexagonus. 



synonym C. perotetti (Pfeiffer, Enum 

 d La Guavra. Venezuela. The plai 



from La 



(Labouret, Monog 



nonym 



may 



ruglaucus (Ladenberg, Monatsschr. Kakteenk. 3:; 

 Karsten. Deutsche Fl. f. ';oi. No. 8: Pison. Hist 



Schumann, Gesamtb. Kakteen f. 25; Curtis's Bot. Mag 



lividus. 



100. f. i; 



from a ohotofi^raoh taken bv Mr 



H 



Brazil, in 1914. 



J 



1768. 



6. Cereus tetragonus (I^innaeus) Miller, Gard. Diet, ed 8. No. 2 



Cactus tetragonus Linnaeus, Sp. PI. 466. 1753. 



Plant upright, i to 2, meters high, freely branching; branches green, erect, forming a narrow 

 compact top; ribs mostly 4, rarely 5, at first high, separated by acute intervals, compressed, obtuse; 

 areoles close together, white-felted; spines brown to nearly black, usually acicular to subulate; 

 radial spines 5 or 6, 6 to 8 mm. long; central spines solitary or several, a little stouter than the 

 radials; flower funnelform, 13 cm. long; all the perianth-segments reddish; ovary bearing small scales, 

 glabrous. 



Type locality: Curasao, according to Linnaeus, but not know^n there now. 



Distribution: Rio de Janeiro, Brazil, according to Schumann. 



Our description is drawn partly from living specimens in the New York Botanical 

 Garden. 



Cereus tetragonus ramosior Link and Otto (Verb. Ver. Beford. Gartenb. 6: 432. 1830J 

 is given by name only; C. tetragonus major Salm-Dyck (Walpers, Repert. Bot. 2 : 277. 1843) 

 is given as a synonym for C. tetragonus. 



Illustration: Monatsschr. Kakteenk. 12: 158. 



Figure 8 is from a photograph of a plant in the New York Botanical Garden, received 

 from Mr. Frank Weinberg in 1901. 



- 4 



7. Cereus stenogonus Schumann, Monatsschr. Kakteenk. 9: 165. 1899. 



Tree-like, up to 6 to 8 meters high, much branched or nearly simple, bluish green to yellowish 



very 



late and the longer up to 4.5 cm. long; flowers large, 20 to 22 cm. long, funnelform, the tube long and 

 slender; outer perianth-segments narrow, 7 to 8 cm. long, mucronate, rose-colored or with rose-colored 

 margins; fruit large, 10 cm. long or less, red or orange without, with white or carmine flesh; seeds dull. 



Type locality: Paso la Cruz, Paraguay. 

 Distribution: Paraguay and northeastern Argentina. 



