CEPHAI^OCHREUS. 



49 



Illustration: Contr. U. S. Nat. Herb. 12: pi. 64. 



Figure 71 is from a photograph taken near Salama, Guatemala, by W. R. Maxon 



32. Cephalocereus piauhyensis (Giirke). 



Cereus piauhyensis Giirke, Monatsschr. Kakteenk. i8: 84. 1908. 



smooth 



00 



ing one bearing a tuft of long white hairs; spines numerous, yellowish brown, acicular,' unequal the 

 longest 3 cm. long; flowers 3-5 to 4 cm. long, naked; fruit depressed, glaucous, 4 cm. broad, naked. 



Type locality: Rocks of the Serra Branca, Piauhy, Brazil. 



Distribution: On the dry hills in the caatinga along the Sao Francisco River in the States 

 of Bahia and Piauhy, Brazil. 



Itres&mhl&s Cephalocereus catingicola, hnihsiSmoYQ slender branches, more ribs, smaller 

 flowers, and smaller fruits. The trunk is woody, very heavy, and is often sawed into 



making: oicture frames 



We 



collected by Dr. Rose in Bahia without having seen the type of the species. 



Brazil, in 1915. 



from a photograph taken by Paul G. Russell east of J 



lanugin 



Cactus lamigijiosus Linnaeus, Sp. PI. 467. 1753. 



Cereus laniigi^iosus Miller, Gard. Diet. ed. 8. No. 3. 1768, as to name only, 



Cereus crenulatus Salm-Dyck, Observ. Bot. 3: 6. 1822. 



Cereus lanuginosus glaucescens Pfeififer, Enum. Cact. 80. 1837. 



Pilocereus crenulatus Riimpler in Forster, Handb. Cact. ed. 2. 655. 1885. 



Pilocereus lanuginosus Riimpler in Forster, Handb. Cact. ed. 2. 672. 1885. 



Often tall and tree-like, either nearly simple or much branched; branches elongated, 9 to 13- 

 ribbed, bright blue, somewhat glaucous; ribs rounded when young, separated by acute intervals; 

 spines acicular, light yellow when young; young areoles all woolly, the flowering ones bearing dense 

 tufts of wool, but this not very long; flowering areoles confined to 2 to 4 ribs on the south side of the 

 plant; flower-buds short, green, rounded at the apex; flowers opening in the early evening, 6 cm. 



lone"! outer npriantVi-cf^nrmf^nfc cVirkrf crvf^f^n* innpr nprinntli-«;p{rment«; ovatp wbitp <;Viort' cfnmpnc 



naked. 



green 



p. shVhtlv exserted: stis^ma-lobes 



Type locality: Island of Curasao. 

 Distribution: Curasao, Aruba, Bonaire. 



Salm 



Illustrations: I^oudon, ^ncyl 



1834) is only a mentioned name. 



Hermann 



as Cereus crectuSy etc; 



Monatsschr. Kakteenk. 12: s6, as Pilocereus lanuginosus. 



Figure 73 is from a photograph taken on Curasao by Mrs. J. N. Rose in 1916. 



34. Cephalocereus brooksianus Britton and Rose, Torreya 12: H- 1912. 



Cereus brooksianus Vaupel, Monatsschr. Kakteenk. 22: 66. 1912. 



Plant 3 to 6 meters high, stout, much branched at base, bluish green, glaucous; ribs 8 or 9, 

 obtuse; areoles closely set, in flowering specimens almost contiguous, bearing silky hairs when young 

 and tufts of long white hairs at flowering ones; spines about 16, acicular, up to 3 cm. long, yellow, 

 all somewhat similar, the upper ones in each areole ascending; flowers 5 to 6 cm. long, opening in the 

 evening, odorless, somewhat flattened; tube stout, rigid, green, with only 2 or 3 small scales; inner 

 perianth-segments about 10, rather rigid, broad, a little spreading; throat of flower wide; stamens 

 very numerous, all included; filaments white, attached all over the long broad throat, 3 cm. long; 

 tube proper very short, 8 mm. long or less; style white, rigid, 5 cm. long; ovary naked. 



Type locality: Near Novaliches, about six miles south of Guantanamo, Cuba. 

 Distribution: Dry, rocky situations, provinces of Oriente and Santa Clara, Cuba. 



from 



m I 



Garde 



. ' "^ 



