By John M. Coulter
Contributions from the U.S. nationwide Herbarium, 1894.
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Depressed-globose, proliferous and cespitose, tuberculate-ribbed, unarmed plants: tubercles at first conical and bearing at summit a flower-bearing areola with a dense tuft or short pencil of compact erect hairs, when mature becoming broad and rounded (with the remnant of the penicellate tuft as a persistent pulvillus in a small central depression) and coalescing into broad convex vertical ribs: spine bearing areolae obsolete: flowers borne at the summit of nascent tubercles: ovary naked (that is free from scales, but often downy): fruit and seed unknown.
In diameter) more in the mountains and northward. Evidently near to emoryi, but becoming much taller and with more numerous and unequal radials and more numerous centrals. 11. Echinocactus emoryi Engelm. in Emery’s Rep. 150 (1848). Glaucescent, globose to ovate, 3 to 9 dm. high, 3 to 6 dm. 5 to 5 cm. 5 cm. 5 to 4 cm. long: seeds black and pitted, 2 mm. long. (Ill. Cact. Mex. Bound. t. 28; Cact. Whippl. Exped. t. 3, fig. 3)—Type: the Emory specimen was not found in the Engelmann collection, but the specimens of Bigelow and Schott, included in the full description of Cact.
Ill. Cact. Mex. Bound. t. 12. figs. 1-16)—Type of Scheer’s strobiliformis is unknown; but the specimens of Prince Salm-Dyck in Herb. Mo. Bot. Gard. are marked “authentic” by Dr. Engelmann. The Wright specimens in the same Herb, represent the type of M. tuberculosa Engelm. From the mountains of extreme southwestern Texas (common west of Devil’s River), southward into Chihuahua and Coahuila. Fl. MayJune. 119 Specimens examined: Texas (Wright 18, 19, 20, 23, 24, 29, 30,31,32, 535, of 1849 and 1852; Bigelow of 1852; Engelmann, with no number or date; Evans of 1891): Chihuahua (Pringle 250, 251 in part, and 258 of 1885): Coahuila (Palmer of 1880): also specimens from Coll.
A Preliminary Revision of the North American Species of Cactus... by John M. Coulter