:-"■ y 



NYCTOCEREUS.- 



119 



Known in Mexico 



Illustrations: Link and Otto, Ic. PI. Select, pi. 42, as Cactus serpcnlin 



Iv h 



Descr. PI. Rares pi. 36; Van Geel, Sert. Bot. 3: pi. 17, the last two as Cactus amhiguus; 



Wiss. Munchen 19; pi. 2; Cact. J 



64: 





pi. 3566; Diet. Gard. Nicholson i:f. 410; Forster, Handb. Cact. ed. 2. f. 95; Gartcnflora 

 31: pi. 1079, f. 2. c; Mem. Mus. Hist. Nat. Paris 17: pi. 12; Rep. Mo. Bot. Gard. 16: pi. 

 II, f. I to 3; Riimpler, Sukkulenten f. 65, as Cereus serpentinus. 



Plate XV, figure 3, shows the flower of a plant in the collection of the New York Botan- 



ical Garden. 



Mexico bv H. H 



2. Nyctocereus hirschtianus (Schumann) Britton and Rose, Contr. U. S. Nat. Herb. 12 : 424, 1909. 



Cereus hirschtianus Schumann, Gesamtb. Kakteen 130. 1897. 



^ Stems columnar, erect, slender, 10 mm. in diameter; ribs 10, somewhat acute, 3 nun. high; 

 radial spines 7 to 9, slender, 4 to 5 mm. long; central spines i to 5, the lower one stouter and porrect; 



gments 



ovary and tube very 



Type locality: Nicaragua. 



Distribution: Known only from the type locality. 



This species differs from A^, guatemalensis in its habit, more slender stem, its spines, 

 which are much more slender and delicate but not as long, and its smaller flowers. Wein- 

 gart has written extensively (Monatsschr. Kakteenk. 23:108 to iii. 1913) about this 

 species, reaching the conclusion that it and N. guatemalensis are the same. We have both 

 types before us, and feel convinced that the species are distinct. 



Illustration: Schumann, Gesamtb. Kakteen f. 31, as Cereus hirschtianus. 



Figure 177 shows the flower of a cotype specimen in the herbarium of the United 

 States National Museum. 



3. Nyctocereus guatemalensis Britton and Rose, Contr. U. S. Nat. Herb. 16: 240. 1913. 



Cereus guatemalensis Vaupel, Monatsschr. Kakteenk. 23: 86. 1913- 



Stems half erect, arching, creeping, or even prostrate, i meter long or longer, 3 to 6 cm. in 



very 



very fragrant 



what tuberculate, each tubercle crowned by an areole bearing a bunch of pmkish or brownish spmes; 

 outer perianth-segments brownish; inner perianth-segments lanceolate, acute, nearly white; stamens 

 much shorter than the perianth, attached all along the surface of the wide throat; style stout, 3 cm. 

 long; fruit about 2 cm. long, spiny; seeds black, shining, 3 mm. in diameter. 



Type locality: Kl Rancho, Guatemala. 



Distribution: Guatemala. 



Illustrations: Monatsschr. Kakteenk. 19: 167, as Cereus hirschtianus; Contr. U. S. 



Herb 



Botanical Garden in 19 15. Figure 178 is from 



specimen 



specimen 



neumanmi 



1909 



Cereus neumannii Schumann in Loesener, Bot. Jahrb. Engler 29: 99- 1900 



t . 



■L- 



Stems columnar, up to i meter long, 3 cm. in diameter, ascendmg or decumbent; ribs 13, some- 

 what crenate ; spines 10 to 14, radials and centrals similar, acicular, up to 4 cm. long, grayish, brownish 

 when young; flower 10 cm. long; ovary tuberculate, bearing felt and brown or reddish spines in its 

 areoles; inner perianth-segments white, lanceolate, long-acuminate. 





Type locality: Near ( 

 Distribution: Known 



Metagalpa 



from 



