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 191 1. 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 napina. 



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'oung short- woolly in 

 the axils and at the areoles ; spines 5 or 6, all radial, 4 or 5 mm. long, brown with dark tips ; axils of 

 tubercles bearing crisp hairs; flowers about 15 mm. long, reddish purple; perianth-segments lanceo- 

 late, acute; stigma-lobes 5, reddish. 



Type locality: Not cited. 



Distribution: Doubtless Mexico. 



We have had a living plant from Haage and Schmidt and one from Ouehl which we have 



used in our description. 



