. Carnegie Institution of Washington publication. THE CACTACEAE. 5. Pereskia (?) zehntneri sp. nov. Shrub, 2 to 3 meters high, with a central erect trunk, very spiny; branches numerous, horizontal, usually in whorls, sometimes as many as 10 in a whorl; branches terete, green, fleshy, very easily detached from the stem; leaves stiff, fleshy, numerous, small, 2 to 4 cm. long, ovate to orbicular, acute, standing at right angles to the branches; areoles large, filled with short white wool and numerous slender white spines; flowers at tops of branches, large, 7 to 8 cm. broad, bright red, appear- i
. Carnegie Institution of Washington publication. THE CACTACEAE. 5. Pereskia (?) zehntneri sp. nov. Shrub, 2 to 3 meters high, with a central erect trunk, very spiny; branches numerous, horizontal, usually in whorls, sometimes as many as 10 in a whorl; branches terete, green, fleshy, very easily detached from the stem; leaves stiff, fleshy, numerous, small, 2 to 4 cm. long, ovate to orbicular, acute, standing at right angles to the branches; areoles large, filled with short white wool and numerous slender white spines; flowers at tops of branches, large, 7 to 8 cm. broad, bright red, appear- ing in November; petals broad, retuse; ovary borne in the upper end of the branch, very narrow, 3 to 4 cm. long, bearing the usual leaves, areoles, and spines of the branches. Collected by Dr. Leo Zehntner (Nos. 567 and 630, type) November 15 and 16, 1912, at Bom Jesus da Lapa, Bahia, Brazil, on the Rio Sao Francisco. This is a very rare plant and seen in only one locality, in soil of a peculiar chalky formation. Liv- ing plants were taken by Dr. Zehntner to the Horto Florestal, Joazeiro, Brazil, where they grew well, and whence Dr. Rose obtained specimens in 1915 which were shipped to the United States under No. 19722. The plant is known in Bahia under the name quiabento. It is probably not a true Pereskia; it sug- gests in its habit and foliage some of the Mexican spe- cies of Pereskiopsis, but it may represent a distinct genus. Text-figures 6 and 7 are from the type plant above cited. 6. Pereskia sacharosa Grisebach, Abh. Ges. Wiss. Gottin- gen 24: 141. 1879. Pereskia amapola Weber, Diet. Hort. Bois 938. 1898. Pereskia argentina Weber, Diet. Hort. Bois 938. 1898. Small tree or shrub, 6 to 8 meters high; branches green and smooth, but in age becoming yellowish or light brown; leaves lanceolate to oblanceolate, 8 to 12 cm. long, cuneatc at base, more or less pointed at apex; young areole with i to 3 spines, the longest 5 cm. long, the others when present not over half as long,
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