. Carnegie Institution of Washington publication. . FIGS. 31, 32.—Pterocactus hickenii. FIG. 33.—Pterocactus fischeri. Photograph by Paul G. Russell. 1. Pterocactus hickenii sp. nov. Rootstocks moniliform, consisting of at least 4 joints widely separated; joints above ground 2 or 3, 2 to 3 cm. long, almost hidden by the spines; spines from each areole numerous, slender, yellow above, brown at base; glochids numerous; fruit and flower not known; seeds thick, 5 mm. in diameter, with narrow lateral wing. Collected by Cristobal M. Hicken (No. 3284) January 10, 1914, near Como- doro Ri
. Carnegie Institution of Washington publication. . FIGS. 31, 32.—Pterocactus hickenii. FIG. 33.—Pterocactus fischeri. Photograph by Paul G. Russell. 1. Pterocactus hickenii sp. nov. Rootstocks moniliform, consisting of at least 4 joints widely separated; joints above ground 2 or 3, 2 to 3 cm. long, almost hidden by the spines; spines from each areole numerous, slender, yellow above, brown at base; glochids numerous; fruit and flower not known; seeds thick, 5 mm. in diameter, with narrow lateral wing. Collected by Cristobal M. Hicken (No. 3284) January 10, 1914, near Como- doro Rivadavia, southeastern Chubut, Argentina. Figures 31 and 32 represent a plant and a seed from the specimen above cited 2. Pterocactus fischeri sp. nov. Stems low, i dm. high or less, spreading or erect, cylindric, cm. in diameter, tuberculate; leaves minute, acute; tubercles about as long as broad, arranged in spiral ridges somewhat resembling those of Opuntia u'hipplei; spines numerous, the radials 12 or more, white, setaceous, 6 mm. long, spreading; centrals usually 4, i to cm. long, brownish, the tips and bases often yellowish;. 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 Washington
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