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STROPHOCACTUS. 



221 



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Type locality: Mexico 

 Distribution: Central 



Mexico 



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formis, but, owing to its more regular f 

 to refer it elsewhere. It is known to us 



Aporocactus flagelli 



\y from 



Kakteen 



Mag 



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Monatsschr. Kakteenk. 9: 105; Rep. 

 Mo. Bot. Gard. 16: pi. 12, f. i, as 



Cereus martianus. 



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Figure 301 is copied from Curtis's 

 Botanical Magazine plate 3768. 



The following description is based 

 on a plant of this relationship, but it 

 differs from figured specimens in the 

 broader perianth-segments, shorter 

 flower- tube, and red filaments. It was 

 obtained from the Theodosia B . Shep- 



FiG. 300. — Flower of Aporocactus conzattii. 

 Fig. 301 .-^Flower of Aporocactus martianus 



Company 



Washingt 



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Ribs 5 to 7, separated by broad intervals, somewhat undulate; areoles about i cm. apart, 

 circular, bearing white wool and spines; spines about lo, acicular, yellow; flower-bud acute; flowers 

 dark red, 9 cm. long, the tube shorter than the limb; tube -proper about 2 cm. long; throat 1.5 cm. 

 long; scales on the ovary numerous, narrow, their axils with white wool and clusters of spines; axils 

 of upper scales naked; outer perianth-segments narrow, acute; inner perianth-segments broadly 

 lanceolate, 1.5 cm. broad, acute, carmine; stamens erect, not quite as long as the inner perianth- 



white; fruit not known. 



carmine 



the filaments; stigma-lobes 



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The only flower seen opened in the early morning 



9. STROPHOCACTUS Britton and Rose, Contr. U. 

 epiphyt 



1913- 



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thin, broad, flat, somewhat branching, the margins l^earing numerous closely-set areoles; spines 

 numerous, acicular; flowers large, red, narrowly funnelform, nocturnal; ovary and flower-tube with 

 numerous hairs and bristles in the axils of the scales; perianth cutting off from the ovary as in 

 Cereus; fruit ovoid, with a truncate apex, its areoles bristly; seeds black, ear-shaped, with an open 

 hilum. 



Mr. Berger proposed a subgenus Phyllocereus for this plant, supposing it represented 

 a connecting link between Phyllocactus and Cereus. Its flat stems are like those of Epi- 

 phyllum; its flower is most like that of Selenicereus. Berger's name, while appropriate, 

 could not be used because of the Phyllocereus Miquel (Bull. Sci. Phys. Nat. Neerl. 112. 1839). 

 The name is from the Greek, referring to the twisting or turning of the stem about trees. 



A monotypic genus of the Amazonian forests, still rare in collections. 



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1. Strophocactus wittii (Schumann) Britton and Rose, Contr. U. S. Nat. Herb. 16: 262. 19 13. 



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Cereus wittii Schumann, Monatsschr. Kakteenk. 10: 154. 1900. 



A thin, very flat plant, often i dm. broad, growing appressed to trunk of trees; joints broad, 

 leaf -like, 3 or 4 times as long as broad, rounded at base and apex, ^vith a stout central vein and nearly 

 entire margin; areoles small, closely set along the margin of the joints, 6 to 8 mm. apart, bearing 

 tufts of wool and bristles besides the spines; spines numerous, acicular, yellowish brown, 12 mm. 

 long or less; flowers elongated, la!rge, 25 cm. long; tube elongated, tapering upward, only about half 



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