226 The cactaceae. 



Type locality: Tacaquira, Bolivia. 

 Distribution: Southern Bolivia. 



CEREus TarijEnsis Vaupel, Monatsschr. Kakteenk. 26: 123. 1916. 



Columnar, 1.5 meters high, 2.5 dm. in diameter; areoles broadly elliptic to oval; radial spines 

 10 to 13, stout, pungent, unequal, reddish brown; central spine solitary, 7 cm. long; flower 10 cm. 

 long; outer perianth-segments lanceolate; inner perianth-segments spatulate. 



Type locality: Escayache, near Tarijo, Bolivia. 

 Distribution: Southern Bolivia. 



8. Borzicactus aurivillus (Schumann). (See page 163, ante.) 



Cereus aurivillus Schumann, Monatsschr. Kakteenk 13: 67. 1903. 

 Cylindric, 2.5 dm. high or more, 2.5 cm. in diameter; ribs 17, crenate; areoles closely set, 

 only 5 to 7 mm. apart, elliptic, bearing yellow curly wool; spines 30 or more, nearly equal, short, 

 colorless except the yellow bases; flower from near the top of the plant, somewhat zygomorphic, 

 6 cm. long; inner perianth-segments obtuse. 



Type locality: Probably Peru. 



Distribution: Andes of Peru. 



Illustrations: Monatsschr. Kakteenk. 29: 7, 9, as Cereus aurivillus. 



Oreocereus celsianus. (See page 171, ante.) 



Restudy of Pilocereus straussii may show that it is specifically distinct from Oreocereus 

 celsianus. The name Cereus straussii was really published by Heese in Gartenflora (62 : 383) 

 in 1907, although the illustration accompanying it bears the legend, Pilocereus straussii. 



Illustrations: Mollers Deutsche Gart. Zeit. 25: 483. f. 15, as Pilocereus celsianus 

 bruennowii; Schelle, Handb. Kakteenk. 100. f. 39, as Pilocereus celsianus; Gartenflora 

 62: 383. f. 55, as Pilocereus straussii. 

 Cleistocactus baumannii. (See page 174, ante.) 



Of this relationship is the following: 



CEREus TupizEnsis Vaupel, Monatsschr. Kakteenk. 26: 124. 1916. 



Slender, 2 to 3 meters high; ribs unknown; areoles large, oval; spines 15 to 20, subulate, 

 pungent, reddish brown; central spines 2, one above the other, 4.5 cm. long; flower tubular, some- 

 what zygomorphic, 8 cm. long, pale salmon-colored ; outer perianth-segments small; inner perianth- 

 segments broader than the outer; stigma-lobes 8, 4 mm. long. 



Type locality: Tupiza, Bolivia. 

 Distribution: Southern Bolivia. 



5a. Hylocereus venezuelensis sp. nov. (See page 186, ante.) 



Vines rather slender, climbing, bluish, 3-angled, the joints 3 to 4 cm. broad; margin of ribs 

 not horny; spines 2 or 3, short, stubby, brown to black; flowers very fragrant, large, 2.5 dm. long; 

 scales on ovary and perianth-tube green with purple margins; inner perianth-segments large, oblong, 

 white above, pink below; stigma-lobes cream-colored, deeply cleft. 



Collected by J. N. Rose near Valencia, Venezuela, in 1917 (No. 21835). 



We were at first disposed to refer this plant to H. polyrhizus but when it flowered 

 in the New York Botanical Garden in June 1920, it produced a flower strikingly dif- 

 ferent in its stigma-lobes, which are deeply cleft as in H. lemairei. In H. polyrhizus 

 the stigma-lobes, so far as we know, are always entire. According to W. Weingart, a 

 keen student of these plants, H. lemairei and H. monacanthus are the only two species 

 he knows with bifid stigma-lobes; they may also occur in H. bronxensis. 



