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By Weniger D.

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Example text

3 inches tall. (below, left) Mammillaria runyonii. 4 inches in diameter. (below, right) Mammillaria similis. Typical small plant; diameter 3 inches. 30 Mammillaria similis. Old plant in full bloom. Diameter 12 inches. Mammillaria vivipara var. vivipara. 21/4 inches in diameter. 31 32 Mammillaria vivipara var. arizonica. 3 inches in diameter. Mammillaria fragrans 21/4 inches in diameter. Plate 32 (opposite) (above, left) Mammillaria vivipara var. radiosa. 2 inches in diameter. (above, right) Mammillaria vivipara var.

16 Wilcoxia poselgeri. Single upright stem, 12 inches long. Echinocereus papillosus var. papillosus on ground. (above, left) Echinocereus blanckii. Stem pictured, 101/2 inches long. Echinocereus berlandieri. Tallest stems pictured, 4 inches high. 17 Peniocereus greggii. Flowers 27/8 inches in diameter. (below, left) Acanthocereus pentagonus. Flower 61/2 inches long, including ovary and tube. (below right) Echinocactus horizonthalonius var. curvispina. 6 inches in diameter. 18 Echinocactus texensis.

Main pad 12 inches across.

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