THE CACTACEAE. 



Illustrations: Contr. U. S. Nat. Herb. 12: pi. 61, as Cereus jamacaru; Lemaire, Ic. 

 Cact. pi. 8*, as Cereus perrottetianus; Maza and Roig, Fl. Cuba pi. 23, as Cereus lepidotus. 



Text-figure 1 is from a photograph of the plant taken by Marshall A. Howe at San- 

 turce, Porto Rico; text-figure 2 shows a flower and text-figure 3 a longitudinal section of 

 the same drawn by Miss H. A. Wood at Hope Gardens, Jamaica; text-figure 4 shows a 

 fruit collected by Dr. Rose near Caracas, Venezuela, in 191 6. 



2. Cereus hildmannianus Schumann in Martius, Fl. Bras. 4 2 : 202. 1890. 



Plant tall, up to 5 meters high, often much branched; ribs 5 or 6, high, thin, rounded, green 

 or often with large yellow patches along the sides; areoles distant, large, at first without spines, 

 afterward a few developing ; flower elongated, funnelform, 20 to 23 cm. long; inner perianth-segments 

 white, broad and obtuse; ovary naked, 2.5 to 3 cm. long. 



Type locality: State of Rio de Janeiro, Brazil. 

 Distribution: Eastern Brazil. 



Cereus hildmannianus. 



Although this species seems to be a common yard and park plant in Bahia and Rio de 

 Janeiro, it has never been well understood. It there forms bushy plants and is usually 

 without spines. It is probably quite distinct from Cereus jamacaru, to which it has been 

 referred by some authors; it grows in moister regions. 



Illustrations: Martius, Fl. Bras. 4 2 :pl. 41, f. 1; Monatsschr. Kakteenk. 2: 57. 



Text-figure 5 is from a photograph taken by Paul G. Russell near Rio de Janeiro, Brazil, 

 in 1915; text-figure 6 is from a photograph takenby Dr. J. N.Mills at Rio de Janeiro in 1916. 



3. Cereus alacriportanus Pfeiffer, Enum. Cact. 87. 1837. 



Cereus peruvianas alacriportanus Schumann, Gesamtb. Kakteen 115. 1897. 



Cereus paraguayensis Schumann in Chodat and Hassler, Bull. Herb. Boiss. II. 3: 249. 1903. 



Stems up to 2 meters high; ribs mostly 5, strongly compressed, 3 cm. high, separated by deep 

 sharp intervals, rounded on the edge; areoles 2 to 2.5 cm. apart, when young filled with white wool; 

 spines 6 to 9, all spreading, when young golden yellow, but gray when older, red at the bases, subu- 

 late, 2.5 cm. long; flowers 21 to 22 cm. long, 10 cm. broad at mouth; outer perianth-segments 

 narrow, 1 cm. wide or less; inner perianth-segments spatulate, obtuse to acute, fringed or entire, 

 white with a rosy tinge; stigma-lobes 13, yellowish green; ovary cylindric, naked. 



Type locality: Porto Alegre, Brazil. 

 Distribution: Southern Brazil and Paraguay. 



*Lemaire's plates are not numbered and there is more or less uncertainty as to their order. We have fol- 

 lowed Schumann in referring this species to plate 8. In the only copy which we have examined it is plate 11. 



