. Carnegie Institution of Washington publication. io4 THE CACTACEAE. cm. long; ovary and flower-tube bearing lanceolate acute scales, these without hairs in their axils "â â Type locality: Above Balsas in the department of Amazonas, Peru. Distribution: Northeastern Peru. Through the kindness of F. Vaupel we have been able to study a fragment of this very interesting species. It much resembles Matucana haynei. 12. HAMATOCACTUS gen. nov. Globose to short-cylindric, of flabby texture like an Echinocereus, distinctly ribbed, the ribs more or less spiraled; areoles circular; spines radial
. Carnegie Institution of Washington publication. io4 THE CACTACEAE. cm. long; ovary and flower-tube bearing lanceolate acute scales, these without hairs in their axils "â â Type locality: Above Balsas in the department of Amazonas, Peru. Distribution: Northeastern Peru. Through the kindness of F. Vaupel we have been able to study a fragment of this very interesting species. It much resembles Matucana haynei. 12. HAMATOCACTUS gen. nov. Globose to short-cylindric, of flabby texture like an Echinocereus, distinctly ribbed, the ribs more or less spiraled; areoles circular; spines radial and central, one of them usually hooked; flower- bud pointed, covered with imbricating scales; flower-tube narrow, funnelform; limb broad; scales on the ovary few, fugacious, small, naked in their axils; fruit small, globular, red, dehiscing by a basal pore; seeds black, tuberculate; hilumlarge, basal, circular; embryo straight; cotyledons short and thick. Echinocactus setispinus Engehnann, the only species here recognized, is the type. Although this plant heretofore always passed as an Echinocactus its anomalous charac- ters have been, recognized, such as the texture of the fleshy stem, the fruit, and the seeds; Engelmann in his. Synopsis of the Cactaceae thus spoke of it: "The compressed ribs, setaceous spines, small red berry, and tuberculated seeds easily distinguish it from all its ; The generic name is from hamatus hooked, and cactus, referring to the hooked central 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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