NEOMAMMILLARIA. 117 
16 to 20, white, setaceous; central spines 4, black, subulate, spreading or reflexed, the lowest one 
longest ; flowers from upper part of plant, dark red; perianth-segments oblong, acuminate. 
Type locality: Mexico. 
Distribution: Mexico, but range unknown. 
This species has not been recognized by recent writers, and while we have seen no 
specimens we believe it deserves specific rank. 
Schumann refers Mammillaria nigricans definitely to M. rhodantha but, it appears to 
us, without justification; the Index Kewensis has referred it, we believe properly, to M. 
phaeacantha. 
Mammillaria phaeacantha rigidior (Salm-Dyck, Cact. Hort. Dyck. 1844. 8. 1845) is 
only a name. 
Illustration: Pfeiffer, Abbild. Beschr. Cact. 2: pl. 23, as Mammillaria nigricans. 
Figure 122 is reproduced from the illustration cited above. 
75. Neomammillaria graessneriana (Bédeker). 
Mammillaria graessneriana Bédeker, Monatsschr. Kakteenk. 30: 84. 1920. 
Solitary, or becoming cespitose, globose, 6 to 8 cm. in diameter, dark bluish green, somewhat 
depressed at apex; tubercles 4-angled, 8 mm. long, not milky, obtuse or truncate at apex, not setose 
in their axils; spine-areoles circular, white-woolly when young, nearly naked in age; radial spines 
18 to 20, acicular, 6 to 8 mm. long, white; central spines 2 to 4, stouter than the radials, spreading, 
8 mm. long, reddish brown; flowers small, somewhat distant from the apex of the plant. 
Type locality: Mexico. 
Distribution: Mexico, but range unknown. 
Illustration: Monatsschr. Kakteenk. 30: 85, as Mammillaria graessneriana. 
Figure 123 is reproduced from the illustration cited above. 
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Fics. 124 and 12 5.—Neomammillaria spinosissima. 
- 76. Neomammillaria spinosissima (Lemaire). 
>Mammillaria spinosissima Lemaire, Cact. Aliq. Nov. 4 1838. 
Mammillaria polycentra Berg, Allg. Gartenz. 8: 130. 184 346 
Mammillaria auricoma Dietrich, Allg. Gartenz. 14: 308. 2 4 “8 § 
Mamamillaria polyacantha Ehrenberg, Allg. Gartenz. i : 265. aaa . 
Mammiillaria polyactina Ehrenberg, Allg. Gartenz. 2 “bat 
Mamamillaria hepatica Ehrenberg, Allg. Gartenz. 10: 2 57. 84 . 
Mamamillaria pomacea Ehrenberg, Allg. Gartenz. 10: 267. ee 
Mammillaria pulcherrima Ehrenberg, Allg. Gartenz. 17: 249. . 
Mammillaria pretiosa Ehrenberg, Allg. Gartenz. 17 250. 49. 
