FACHEIROA -CLEISTOCACTUS. 173 



PUBLISHED SPECIES. PERHAPS NEAR OREOCEREUS CELSIANUS. 



CEREUS Md.wn.i. hanus Weber in Schumann, Gesamtb. Kakteen 67. 1897. 



Cleislocactus monvilleanus Weber in Gosselin, Bull. Mens. Soc. Nice 44: 45. 1904. 



Columnar, branching; ribs 19, obtuse, somewhat sinuate; radiaJ spines about 20, setaceous or 

 acicular. 



Distribution: Uncertain. Perhaps Peru, Bolivia, or Ecuador. 



According to Weingart, this species is near Cereus aurivillus and, if so, it is a Borzi- 

 cactus. So far as we are aware, its flowers are unknown. We have never seen specimens 

 of it. 



33. FACHEIROA gen. now 



Trunk short, with numerous slender, erect or ascending branches; ribs numerous, spiny; flowers 

 borne in a pseudocephalium, this densely brown or red-felted; flowers small, the ovary and flower- 

 tube covered with long silky brown or red hairs; tube-proper short, smooth within; throat short, 

 not hairy at base, bearing numerous short, included stamens; inner perianth-segments short, white; 

 fruit small, globular, greenish, and gelatinous within; seeds black, tuberculate, with a large basal 

 hilum. 



Dr. Zehntner states that the habit of this plant is like Cereus squamosus, but that the 

 plants differ in the manner of producing their flowers. The flowers, although about 

 the same size, show that the two species are generically different. The generic name is from 

 the common Brazilian one used for a number of the cacti, this one being called faeheiro 

 preto da Serra de Cannabrava. Only one species is known. 



1. Facheiroa publiflora sp. now 



Erect, 1.5 to 5 meters high, much branched; trunk short, 10 to 12 cm. in diameter; branches 

 slender, elongated, 5 to 7 cm. in diameter, at first light green, in age grayish green; ribs about 15, 

 low, 5 to 6 mm. high; areoles 1 cm. apart, brown-felted; spines brownish, all acicular; radial spines 

 10 to 12; central spines 3 or 4, somewhat longer than the radials, often 2 to 2.5 cm. long; pseudo- 

 cephalium extending from the top downward for 2 dm. or more, 2 to 4 cm. broad, composed of a 

 dense mass of short brown or red hairs; flowers 3 to 3.5 cm. long; tube-proper about 1 cm. long, 

 smooth within; inner perianth-segments orbicular, 3 to 4 mm. in diameter; style slender, glabrous; 

 scales on ovary and flower-tube small, 2 to 6 mm. long, greenish, glabrous, obscured by the long 

 hairs from the axils of other scales; fruit about 2 cm. in diameter, hairy; seeds 1.5 mm. long. 



Collected by Leo Zehntner on the Serra de Cannabrava (Chique-Chique district) 

 Bahia, Brazil, October 191 7. 



34. CLEISTOCACTUS Lemaire, Illustr. Hort. 8: Misc. 35. 1861. 



Slender, erect or clambering cacti, with numerous low ribs and approximate areoles; flowers 

 slender, tubular, the perianth withering-persistent on the fruit; perianth-segments small, erect, red 

 to green ; stamens and style exserted ; ovary and flower-tube with numerous appressed scales bearing 

 long hairs or wool in their axils; fruit small, globular, highly colored, becoming naked; pulp white; 

 seeds black, slightly punctate. 



Type species: Cereus baumannii Lemaire. 



Berger recognizes only 1 species, but mentions 3 of Cereus (C. hyalacanthus, C. laniccps, 

 and C. parviflorus) which may belong here, while Roland-Gosselin recognizes 14 species. 

 16 species have been described in the genus. We recognize 3 species. The name is from 

 the Greek, signifying closed-cactus, referring to the unexpanded limb of the flower. 



Key to Species. 



Flowers red or green. 



Flower-tube bent; inner perianth-segments red 1. C. baumannii 



Flower-tube straight; inner perianth-segments green 2. C. smaragdiflorus 



Flowers orange-yellow 3 . C. anguinus 



