. Carnegie Institution of Washington publication. CEPHALOCEREUS. 47 Schumann (Gesamtb. Kakteen 184. 1897) by mistake attributed the name Pilocereus swartzii to Grisebach. Figure 70 is from a photograph obtained by Wm. Harris near Port Henderson, Jamaica. 28. Cephalocereus polygonus (Lamarck) Britton and Rose, Contr. U. S. Nat. Herb. 12: 418. 1909. Cactus polygonus Lamarck. Encycl. i : 5,39. 1783. Ccreus polygonus De Canclollc, I'roclr. 3: 466. 1828. Pilocereus plumieri Lcmaire, Rev. Hort. 1862: 427. 1862. Pilocereus scMumbcrgeri Weber in Schumann, Gesamtb. Kakteen 186. 1897. Pilocereus polygom
. Carnegie Institution of Washington publication. CEPHALOCEREUS. 47 Schumann (Gesamtb. Kakteen 184. 1897) by mistake attributed the name Pilocereus swartzii to Grisebach. Figure 70 is from a photograph obtained by Wm. Harris near Port Henderson, Jamaica. 28. Cephalocereus polygonus (Lamarck) Britton and Rose, Contr. U. S. Nat. Herb. 12: 418. 1909. Cactus polygonus Lamarck. Encycl. i : 5,39. 1783. Ccreus polygonus De Canclollc, I'roclr. 3: 466. 1828. Pilocereus plumieri Lcmaire, Rev. Hort. 1862: 427. 1862. Pilocereus scMumbcrgeri Weber in Schumann, Gesamtb. Kakteen 186. 1897. Pilocereus polygomis Schumann, Gesamtb. Kak- teen 196. 1897. Plants at first simple, but when old with large, much branched tops, 3 meters high or more; trunk erect, i to meters long below the branches; branches elongated, erect or ascending, 5 to 13- ribbcd ; young growth, at least in some forms, very blue; ribs rather narrow, 2 cm. high or more, grooved on their sides; areoles closely set, often only i cm. apart, producing long tawny wool, longer than the short acicular spines; old areoles without wool, vigor- ous and producing very different spines from the new ones; first spines acicular or setaceous, i to cm. long, yellow, becoming gray or darker by age ; sup- plementary spines elongated, subulate, yellowish brown, 2 to 7 cm. long; flowering areoles very woolly; flowers 5 to 6 cm. long, white; perianth- segments rounded or somewhat acutish; fruit glob- ular, 3 to 4 cm. in diameter; seeds numerous, small, 2 cm. long, smooth, shining. Type locality: Santo Domingo. Distribution: Dry parts of Hispaniola. Illustration: Plumier, PI. Amer. ed. Bur- mann, pi. 196. Plate vii, figure i, is from a photograph taken by Paul G. Russell near Azua, Santo Domingo, in Cephalocereus swartzii. 29. Cephalocereus gaumeri sp. nov. Plant 6 meters high, light green, slender, often only 2 to 3 cm., but sometimes 6 cm., in diameter; ribs 8 or 9, 6 to 8 mm. high; areoles 6 to 10, bear- ing short felt an
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