. Carnegie Institution of Washington publication. 120 Till' CACTACRAE. 5. Nyctocereus oaxacensis sp. nov. Stems branching, slender, 2 to 3 cm. in diameter; ribs 7 to 10, rather low; areoles 10 mm apart; radial spines S to 12, 4 to 15 mm. long, slender, brownish; centrals 3 to 5; flowers 8 to 10 cm. long, "whitish inside, dirty purplish or reddish outside"; perianth-segments linear to oblong, rounded at apex; stamens'not extending nearly as far as the perianth-segments; ovary densely covered with brownish bristly spines. Collected by E- W. Nelson about Lagunas, Oaxaca, Mexico, altitud
. Carnegie Institution of Washington publication. 120 Till' CACTACRAE. 5. Nyctocereus oaxacensis sp. nov. Stems branching, slender, 2 to 3 cm. in diameter; ribs 7 to 10, rather low; areoles 10 mm apart; radial spines S to 12, 4 to 15 mm. long, slender, brownish; centrals 3 to 5; flowers 8 to 10 cm. long, "whitish inside, dirty purplish or reddish outside"; perianth-segments linear to oblong, rounded at apex; stamens'not extending nearly as far as the perianth-segments; ovary densely covered with brownish bristly spines. Collected by E- W. Nelson about Lagunas, Oaxaca, Mexico, altitude 255 meters, June 5, 1895 (No. 2543, type). We refer here tentatively another specimen also collected by Mr. Nelson near Huilo- tepec, Oaxaca, altitude 30 meters, May 4 to n, 1895 (No. 2585).. FIG. 178.—Nyctocereus guatemalensis, as it flowered in Washington. 21. BRACHYCEREUS gen. nov. Stems low, forming candelabrum-like masses; branches numerous, cylindric; ribs many, low, with closely set areoles bearing felt and numerous acicular spines; flowers narrow-funnelform, bear- ing small scales which subtend large spiny areoles; outer perianth-segments lanceolate; inner perianth- segments very yarrow, long-acuminate, described as possibly white but more likely yellow; filaments very short; ovam' obliquely subglobose, bearing scattered spiny areoles; fruit ellipsoid, very spiny, but in age probaYly naked. The name is\from the Greek, meaning short-cereus. nly one species is known, native of the Galapagos Islands. 1. Brachycereus thoitarsii (Weber). Cere us Ihniinrsii \\VbiT. Hull. Mils. Hist. Nat. Paris 5:312. 1899. ' Schumann in Robinson, Proc. Amer. Acad. 38: 179. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washing
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