. I.HPTOCEREUS. 



Si 



7. Leptocereus sylvestris sp. nov. 



Tree-like, up to 5 meters high; joints 2 to 3 cm. in diameter, 5 to 7-ribbcd- ribs strondv crcnate- 

 areoes I to 15 em. apart; spines hght brown, long and aeicular%he longest onS o cm lonT^^^^ 

 subglobose, 7 to 8 cm. long, bearing clusters of short spines, thes; early dfciduous 



of 



Collected by Britton, Cowell, and Shafer In coastal woods, Enscnada de Mora 



March 



specimen 



118 a branch. 



i. 



Fig. 118. — Top of branch of 

 Leptocereus sylvestris. Xo.6. 



Fig. 119. — Leptocereus quadricostatus 



>8. Leptocereus quadricostatus (Bello) Britton and Rose, Contr. U. S. Nat. Herb. i6 



^Cereus quadricostatus Bello, Anal. Soc. Esp, Hist. Nat. lo: 276. 1881. 



Plants erect or arching, up to 4 meters high, with numerous 

 lateral, usually elongated branches, often forming thickets; branches 

 dull, dark green, usually 4-ribbed, sometimes 3-ribbed, the ribs thin 

 and low; spines acicular, i to 4 cm. long; flowers 4 cm. long, 2 cm. 

 wide at the mouth; outer perianth-segments green; inner perianth- 

 segments greenish white or yellowish white, truncate, the apex 

 lacerate or erose; ovary and flower-tube bearing a few clusters of 

 short spines; style and filaments greenish; fruit subglobose to obovoid, 

 3 to 5 cm. long, not very spiny, red. 



Type locality: Porto Rico. 



Distribution: Southwestern Porto Rico. 



This plant inhabits hillsides and plains in the dry south- 

 western part of Porto Rico, sometimes forming dense thickets, 

 penetrable only by the use of the machete; it is known as sebucan. 



242 



1913 



Fins. 120 and 121. — Fruit and 



flt>wer of L. quadricostatus. 

 X0.7. 



