. Carnegie Institution of Washington publication. Fig. 34.—Echinocereus Figs. 35 and 36.—Flower and spine-clusters of Echinocereus roetteri. Dr. Kunze uses (Price List of Cactaceae, 1913) suggests Echinocereus viridiflorus. According to Engelmann it is similar to E. dasyacanthus from which it is distinguished by its fewer ribs, stouter spines, purple flowers, smaller fruit, and larger seed. This species was named for Paulus Roetter, the artist, who made the cactus drawings for the Mexican Boundary Survey. Illustrations: Cact. Mex. Bound, pi. 41, f. 3 to 5, as Cereus roetteri

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. Carnegie Institution of Washington publication. Fig. 34.—Echinocereus Figs. 35 and 36.—Flower and spine-clusters of Echinocereus roetteri. Dr. Kunze uses (Price List of Cactaceae, 1913) suggests Echinocereus viridiflorus. According to Engelmann it is similar to E. dasyacanthus from which it is distinguished by its fewer ribs, stouter spines, purple flowers, smaller fruit, and larger seed. This species was named for Paulus Roetter, the artist, who made the cactus drawings for the Mexican Boundary Survey. Illustrations: Cact. Mex. Bound, pi. 41, f. 3 to 5, as Cereus roetteri; Bliihende Kakteen 3: pi. 128, as Echinocereus 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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