. Carnegie Institution of Washington publication. LEPTOCEREUS. 79 Distribution: On limestone rocks, Sierra de Anafe and Sierra de Guane, west- ern Cuba. The wood is very hard; the flowers appear from August to November. At the type locality this tree-like species inhabits a steep rocky slope and cliff, diffi- cult of access, growing as a colony. Figure 113 is from a photograph of the type plant, obtained by Brother Leon, of the Colegio de la Salle, Habana, in whose honor the species was named. 3. Leptocereus prostratus sp. nov. Plant prostrate, bright green, y-ribbed, to 2 cm. thick, the r
. Carnegie Institution of Washington publication. LEPTOCEREUS. 79 Distribution: On limestone rocks, Sierra de Anafe and Sierra de Guane, west- ern Cuba. The wood is very hard; the flowers appear from August to November. At the type locality this tree-like species inhabits a steep rocky slope and cliff, diffi- cult of access, growing as a colony. Figure 113 is from a photograph of the type plant, obtained by Brother Leon, of the Colegio de la Salle, Habana, in whose honor the species was named. 3. Leptocereus prostratus sp. nov. Plant prostrate, bright green, y-ribbed, to 2 cm. thick, the ribs scarcely crenate; are- oles elevated, about i cm. apart; spines 15 to 20 at an areole, acicular, i to 2 cm. long, yel- low when young, gray when old; ovary densely covered with yellow spines; perianth about cm. long; fruit about cm. in diameter. On high, dry, exposed rocks, La Guira, north of Sumidero, Pinar del Rio, Cuba (Shafer, No. 13754, August 17, 1912). Leptocereus prostratus is related to L. leonii, which differs in having an erect trunk, the ribs of the branches deeply crenate, the areoles depressed in the cre- natures, and larger flowers and 4. Leptocereus assurgens () Britton and Rose, Contr. U. S. Nat. Herb. 12: 433- 1909- Cereus assurgens C. Wright in Grisebach, Cat. PI. Cub. 116. 1866. Plant 2 to 3 meters high, not much branched, the ultimate joints 3 cm. in diam- eter or less; ribs 4; areoles i to cm. apart; spines acicular, brown, 2 to 8 cm. long; flow- ers 4 to 5 cm. long; tube and ovary bearing scattered clusters of spines; inner perianth-seg- ments short, numerous, spreading or even turned backward; stamens and style pale greenish white; fruit covered with clusters of short spines. Type locality: Western Cuba. Distribution: On limestone, near northern coast of Habana Province, Cuba. This species was long known only from the collections of Charles Wright, but has been rediscovered by collectors connected with the New York Botanic
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