By John M. Coulter
Contributions from the U.S. nationwide Herbarium, 1894.
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277 (1856). Echinocactus laticostatus Engelm. & Bigel. Pacif. R. Rep. iv, 32 (1856). Glaucous, depressed-globose or at length ovate or even cylindric with age, 4 to 20 cm. 5 to 15 cm. in diameter, simple: ribs 8 to 10 (fewer in very young specimens), often spirally arranged, the tubercles scarcely distinct by inconspicuous transverse grooves: spines 6 to 9, stout, compressed, reddish (at length ashy), recurved or sometimes almost straight, nearly equal, 2 to 4 cm. long (sometimes long and slender and almost terete, sometimes short, stout and broad); radials 5 to 8, upper ones weaker, lowest wanting; a single stouter decurved central (sometimes wanting): flowers pale-rose to purple, 6 cm.
Along the Lower Rio Grande, Texas, and extending southward into San Luis Potosi and southern Mexico. Specimens examined: Texas (Mrs. Nickels of 1892): San Luis Potosi (Eschanzier of 1891): also growing in Mo. Bot. Gard. 1893. 2. Lophophora williamsii lewinii (Hennings). Anhalonium lewinii Hennings, Gartenflora, 410 (1888). A much more robust form, with more innocuous (usually 13) and hence narrower and more sinuous ribs, anti much more prominent tufts. (Ill. Monats. Kakteenkuude, October, 1891)—Type unknown.
Mo. Hot. Gard. Lower California (“vicinity of Molije on the mountain sides 1,000 feet high”) and Sonora, Specimens examined: Lower California (Gabb 12, of 1867): Sonora (Palmer of 1869). ‡ ‡ Spines dissimilar, at least the lateral radials white and setaceous and not annulate (sometimes wanting in Nos. 13 and 17), 13. Echinocactus cornigerus DC. Rev. Cact. 36, t. 7 (1826). Globose or depressed-globose, 25 to 40 cm. in diameter: ribs about 21, very acute and wavy (not tuberculately interrupted): radial spines 6 to 10, white and comparatively slender, or wanting; centrals red and very robust, angular-compressed, with long, sharp, horny tips, the 363 upper 3 erect-spreading, 2 to 3 cm.