. The Cactaceae : descriptions and illustrations of plants of the cactus family. I04 THE CACTACEAE. 54. Neomammillaria napina (Purpus). Mammillan'a napina Purpus, Monatsschr. Kakteenk. 22: 161. 1912. Roots thick, but when in a cluster of 3 or 4 somewhat spindle-shaped; plants globose, 4 to 6 cm. in diameter; tubercles low, terete in section, not at all milky; spines all radial, 10 to 12, pectinate, white or yellowish, spreading and interlacing; flowers unknown. Type locality: Mountains west of Tehuacan, Mexico. Distribution: Southern Alexico. The plant was collected by C. A. Purpus in 1911. In
. The Cactaceae : descriptions and illustrations of plants of the cactus family. I04 THE CACTACEAE. 54. Neomammillaria napina (Purpus). Mammillan'a napina Purpus, Monatsschr. Kakteenk. 22: 161. 1912. Roots thick, but when in a cluster of 3 or 4 somewhat spindle-shaped; plants globose, 4 to 6 cm. in diameter; tubercles low, terete in section, not at all milky; spines all radial, 10 to 12, pectinate, white or yellowish, spreading and interlacing; flowers unknown. Type locality: Mountains west of Tehuacan, Mexico. Distribution: Southern Alexico. The plant was collected by C. A. Purpus in 1911. In 1901 Dr. Rose collected near Tehuacan three small plants which we now beUeve are to be referred here; these dififer from the type plant chiefly in having usually one porrect central spine 5 to 8 mm. long. Some of the spine-clusters have no central spines and then they look very much like those of Neomammillaria napina. Dr. Rose's plants were globose when collected but now are cyUndric, and after 20 years are less than 6 cm. high; they have never flowered. Illustration: IMonatsschr. Kakteenk. 23: 123, as Mammillaria Fig. 102.—Neomammillaria tenampensis. FiG. 103.—Neomammillaria collinsii. 55. Neomammillaria lanata sp. nov. Small, short-cylindric; tubercles short, 2 to 4 mm. long; spine-areoles short-elliptic; spines 12 to 14, all radial, widely spreading, white except the brown bases; flowering areoles very woolly, the young flowers surrounded by a mass of long white hairs; flowers ver\- small, 6 to 7 mm. long, red; inner perianth-segments about 15, oblong, obtuse or acutish, spreading above; stigma-lobes 3, short, obtuse. Collected by C. A. Purpus near Rio de Santa Luisa, Mexico, in 1907 and since grown in "Washington. Figure 105 is from a photograph of the type specimen. 56. Neomammillaria kewensis (Salm-Dyck). Mammillaria kewensis Salm-Dj'ck, Cact. Hort. Dyck. 1849. 112. iSjO. Globose to cylindric, 3 to 4 cm. in diameter; tubercles short, terete, when 3'oun
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