The Cactaceae : descriptions and illustrations of plants of the cactus family . us. 8. Leptocereus quadricostatus (Bello) Britton and Rose, Contr. U. quadricostatus Bello, Anal. Soc. Esp. Hist. Nat. 10: 276. erect or arching, up to 4 meters high, with numerouslateral, usually elongated branches, often forming thickets; branchesdull, dark green, usually 4-ribbed, sometimes 3-ribbed, the ribs thinand low; spines acicular, 1 to 4 cm. long; flowers 4 cm. long, 2 at the mouth; outer perianth-segments green; inner perianth-segments greenish white or yellowish white, trun
The Cactaceae : descriptions and illustrations of plants of the cactus family . us. 8. Leptocereus quadricostatus (Bello) Britton and Rose, Contr. U. quadricostatus Bello, Anal. Soc. Esp. Hist. Nat. 10: 276. erect or arching, up to 4 meters high, with numerouslateral, usually elongated branches, often forming thickets; branchesdull, dark green, usually 4-ribbed, sometimes 3-ribbed, the ribs thinand low; spines acicular, 1 to 4 cm. long; flowers 4 cm. long, 2 at the mouth; outer perianth-segments green; inner perianth-segments greenish white or yellowish white, truncate, the apexlacerate or erose; ovary and flower-tube bearing a few clusters ofshort 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. Figs This plant inhabits hillsides and plains in the dry south- flowerwestern part of Porto Rico, sometimes forming dense thickets,penetrable only by the use of the machete; it is known as sebucan. Nat. Herb. 16: 242. 1.— Fruit and quadricostatus. 82 THE CACTACEAE. Figure 119 is from a photograph taken by Frank F- Dutz at Ensenada, near Guaniea,Porto Rico, in 1915; figure 120 shows a fruit collected by Dr. Britton and Dr. Shafer atGuaniea in 1913; figure 121 shows a flower from a plant at the same locality. PUBLISHED SPECIES, PERHAPS OF paniculatus De Candolle, Prodr. 3: 466. paniculatus Lamarck, Encyl. i: 540. 1783. This has long been in doubt and is known only from imperfect description and illus-tration. Lamarck states that it is from Santo Domingo, in a region called cul-de-sac, andis based on Burmanns plate 192 of Plumier. It is apparently a Leptocereus, perhaps 11. EULYCHNIA Philippi, Fl. Atac. 23. i860. Stout, erect or procumbent and ascending, green cacti, usually with many branches, thebranches parallel-ribbed, armed with spines; perianth white to pinkish, with
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