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Carnegie Institution of Washington publication. . Figs. 182 and 183.—Echinocactus grusonii. Fifi. 184.—Flower of Echino- cactus grusonii. X0.8. Echinocereus grusonii azureus is a form incidentally mentioned by Von Zeisold (Monats- schr.
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An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to
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