. The Cactaceae : descriptions and illustrations of plants of the cactus family. 46 THE CACTACEAE. ous, straight, rigid; radial spines 15 to 20, 10 to 30 mm. long, whitish; inner spines 3 to 6, stouter than the radial ones, deep brown above; flowers large, 5 to 7 cm. broad, rose-colored; outer perianth- segments 30 to 40, linear-subulate, with fimbriate margin; inner perianth-segments 40 to 50, lan- ceolate-linear, attenuate; stigma-lobes 8 to 10, white; fruit oval, green; seeds compressed, light brown, pitted. Type locality: Northern Arizona. Distribution: Northern Arizona, especially along t
. The Cactaceae : descriptions and illustrations of plants of the cactus family. 46 THE CACTACEAE. ous, straight, rigid; radial spines 15 to 20, 10 to 30 mm. long, whitish; inner spines 3 to 6, stouter than the radial ones, deep brown above; flowers large, 5 to 7 cm. broad, rose-colored; outer perianth- segments 30 to 40, linear-subulate, with fimbriate margin; inner perianth-segments 40 to 50, lan- ceolate-linear, attenuate; stigma-lobes 8 to 10, white; fruit oval, green; seeds compressed, light brown, pitted. Type locality: Northern Arizona. Distribution: Northern Arizona, especially along the Upper River of the Grand Canyon, and perhaps also in southern Utah.* Mamniillaria arizonica Engelmann, when first described, was a complex. Engelmann states that it was found "on rocky and sandy soil in northern Arizona from the Colorado eastward (Coues, Palmer, F. Bischoff) and into southern Utah (J. E. Johnson); probably in southeastern ; Engelmann afterwards described Johnson's plant from Utah as ]\I. chlorantha and the California plant is doubtless his M. descrti. We have in the U. S. National Herbarium Palmer's specimen from Arizona but we have not seen the plant of Coues nor of Figs. 44 and 45.—Coryphantha deserti. The northern range of this species is ver}^ uncertain. Engelmann extended it into southern Utah. Plate V, figure 5, shows a plant sent by M. A. H. Spencer from the Grand Canyon, Arizona, in May 1907, which afterwards flowered in Washington. 34. Coryphantha deserti (Engelmann). MammiUaria deserti Engelmann, Bot .Calif. 2: 449. 1880. Cactus radiosiis deserti ConXtQX, Contr. U. S. Nat. Herb. 3: 121. 1894. Cactus radiosus alversonii Coulter, Contr, U. S. Nat. Herb. 3: 122. 1894. MammiUaria alversouii Zeissold, ilonatsschr. Kakteenk. 5: 70. 1895. MammiUaria radiosa alversonii Schumann, Gesamtb. Kakteen 481. 1898. MammiUaria radiosa deserti Schumann, Gesamtb. Kakteen 481. 1898. Solitary or cespitose, usually cylindric, sometimes 2
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Keywords: ., bookauthorbrittonnathaniellord1, bookcentury1900, bookdecade1910
