NEOMAMMILLARIA. 171 
a distinct species. The plant figured by Grassner (Haupt-Verz. Kakteen 38. 1914) shows 
nearly upright branches. 
Illustration: Monatsschr. Kakteenk. 23: 21, as Mammillaria viperina. 
MAMMILLARIA ZEYERIANA Haage jr. in Schumann, Gesamtb. Kakteen 574. 1898. 
Simple, hemispheric to short-cylindric, up to 10 cm. high, pale glaucous-green; tubercles in 13 
or 21 spirals, terete, 10 to 12 mm. long, their axils naked; spine-areoles elliptic, 3 mm. long; radial 
spines 10, white; central spines 4, the uppermost one curved, 15 mm. long, brownish; flowers and 
fruit unknown. 
Described from Mexican plants; supposed to be of Mexican origin. 
PLANTS KNOWN BY NAME ONLY. 
Mammillaria acicularis Lemaire (Cact. Gen. Nov. Sp. 34. 1839) was described without 
the flowers, fruit, or native country being known and has not been identified; here belongs 
Cactus acicularis (Kuntze, Rev. Gen. Pl. 1: 261. 1891), but C. acicularis (Kuntze, Rev. 
Gen. Pl. 1: 260. 1891) based on some name of Lehmann we have not been able to find. 
Mammullaria aulacantha, referred by Schumann and the Index Kewensis to De 
Candolle’s Revision (Mém. Mus. Hist. Nat. Paris 17: 113. 1828), is not to be found at the 
place cited by them; here probably belongs Cactus aulacanthus Kuntze (Rev. Gen. Pl. 1: 
260. 1891). 
Mammillaria beneckei Ehrenberg (Foérster, Handb. Cact. 210. 1846; Cactus benecket 
Kuntze, Rev. Gen. Pl. 1: 260. 1891) was referred to M. coronaria by Schumann. 
Mammillaria brandi is described in Blanc, Hints on Cacti, p. 67, as ‘‘a rare Mexican 
sort, with very long straw-colored spines deflecting from the plant. Flowers cream-colored 
and very fragrant.’’ 
Mammillaria centa is mentioned by C. A. Purpus in a short article in Die Gartenwelt 
(9: 249. 1905). 
Mammillaria chrysantha is listed by De Candolle (Prodr. 3: 460. 1828) among species 
little known but not described. It is said to have been in the Berlin Botanic Garden. 
_Mammillaria circumtexta Martius (Hort. Reg. Monac. 127. 1829) seems never to have 
been described. oo, 
Mammillaria hochderferi is mentioned by C. A. Purpus in a short article in Die Garten- 
welt (9: 249. 1905). 
Mammillaria multiradiata (Martius, Hort. Reg. Monac. 127. 1829) is only a name. | 
2 Mammillaria nigra Ehrenberg (Allg. Gartenz. 17: 287. 1849) was referred to M. 
coronaria by Schumann; Cactus niger Kuntze (Rev. Gen. Pl. 1: 261. 1891) is a synonym 
of it. ‘ 
Mammillaria parmentieri Link and Otto (Verh. Ver. Beférd. Gartenb. 6: 429. 1830), 
without description, was doubtfully referred to M. flavescens. It was supposed, however, 
to have come from Mexico. ; 
The following species, briefly described by F. Schlumberger (Rev. Hort. IV. 5: 404. 
1856), we do not know, nor do we find them mentioned elsewhere: 
Mammillaria albiseta, with flowers like those of M. spinosissima. 
Mammillaria bocasiana, with clear yellow flowers. -_ 
Mammillaria cunendstiana, with flowers like those of M. clillifera. 
Mammillaria decholara, with very small red flowers. 
Mammillaria klenneirii, with rose-colored flowers. 
Mammillaria roematactina, with abundant small rose-red flowers. 
Mammnillaria saluciana, flowers 1.5 cm. long and of the same diameter, flesh-colored. 
without descriptions, appear in Forster's Handbuch (254, 255, 
The following names, 
o far as our observation goes 
1846). Some of the names have been used subsequently, but s 
