NEOMAMMILLARIA. 123 
Mammiullaria pyrrhocentra Otto, its var. gracilior (Salm-Dyck, Cact. Hort. I Dyck. 
1844. 8. 1845), and M. fulvispina pyrrhocentra Salm-Dyck (Cact. Hort. Dyck. 1849. 10. 
1850) were referred as synonyms of M. rhodantha by Schumann, but were not described at 
the places cited. 
> Mammillaria aurea Pfeiffer (Forster, Handb. Cact. 200. 1846; M. rhodantha aurea 
Salm-Dyck, Cact. Hort. Dyck. 1849. 11. 1850) is referred here. We have found no 
description of it. M. odieriana aurea Salm-Dyck (Cact. Hort. Dyck. 1844. 7. 1845), 
also undescribed, may be the same. 
Mammillaria rhodantha cristata (Férster, Handb. Cact. ed. 2. 292. 1885) is only an 
abnormal form. 
Mammillaria recurvispina Hildmann (Schelle, Handb. Kakteenk. 257. 1907) is given 
without synonymy or description. MM. rhodantha schochiana (M. schochiana Hortus) is 
also given at the same place, but so far as we can learn has not been published. 
Mammiullaria tentaculata conothele Monville is given by Labouret (Monogr. Cact. 55. 
1853) as a synonym of M. stueberi, while he refers M. tentaculata fulvispina (Monogr. Cact. 
44. 1853) to M. fulvispina. 
Mammillaria tentaculata rubra (Forster, Handb. Cact. 207. 1846) was given as a 
synonym of M. tentaculata ruficeps. 
Mammiillaria olivacea was cited by Pfeiffer (Enum. Cact. 180. 1837) as a synonym of 
M. tentaculata. 
Mammillaria neglecta was given as a synonym of M. rhodantha neglecta by Salm-Dyck 
(Cact. Hort. Dyck. 1849. 11. 1850). 
Mammillaria rhodantha var. inuncta Hoffmannsegg was listed by Labouret (Monogr. 
Cact. 45. 1853) as one of the synonyms of M. rhodantha. M. rhodantha rubra was given by 
Riimpler (Forster, Handb. Cact. ed. 2. 292. 1885) asa synonym of M. rhodantha ruficeps, but 
afterwards was formally published by Schumann. 
Mamdmnillaria rhodantha celsii Lemaire (Labouret, Monogr. Cact. 48. 1853) was given 
as asynonym of M. lanifera. It probably belongs to M. rhodantha. Cactus capillaris was 
made by Coulter because of the older Mammillaria lanifera of Haworth. Palmer’s plant 
from Saltillo (1880), preserved in the Missouri Botanical Garden, is very different and sug- 
gests that the labels have been mixed. 
Illustrations: Knippel, Kakteen pl. 24; De Laet, Cat. Gén. f. 50, No. 9; Wiener Illustr. 
Gart. Zeit. 29: f. 22, No. 9; Haage and Schmidt, Haupt-Verz. Cact. 1912: 37; Link and Otto, 
Icon. Pl. Rar. pl. 26; Gard. Chron. 111. 42: 290. f. 116; Schelle, Handb. Kakteenk. 256. f. 
179; Gartenwelt 12: 200; Abh. Bayer. Akad. Wiss. Miinchen 2: pl. 1, I. f. 3; Mollers 
Deutsche Gart. Zeit. 25: 475. f. 8, No. 22, as Mammillaria rhodantha ; Grassner, Haupt- 
Verz. Kakteen 1912: 24; Schelle, Handb. Kakteenk. 258. f. 181, as Mammillaria rhodantha 
pfeifferi; Grassner, Haupt-Verz. Kakteen 1912: 24, as M. rhodantha fuscata; Schelle, Handb. 
Kakteenk, 258. f. 180, as M. rhodantha fulvispina; Blanc, Cacti 73. No. 1434; Cact. J ourn. 
1:43, as M. odieriana; Cact. Journ. 1: 43; pl. for February, as M. pfeifferi,; Edwards » Bok. 
Reg. 16: pl. 1329, as M. pulchra; Nov. Act. Nat. Cur. 19: pl. 16, f. 8, as Mammiullaria 
tentaculata. 
Figure 129 is from a photograph of a plant obtained by Dr. Rose through W. Mundt in 
1913, which is now growing at Washington. 
81. Neomammillaria plumosa (Weber). . 
Mammillaria plumosa Weber, Dict. Hort. Bois 804. 1898. 
broad, entirely covered by the mass of white 
2 to 3 mm. long; spines about 4o, all radial, 
to 4 mm. long; perianth-segments with a red 
Small, growing in dense clusters sometimes I 5 cm. 
spines; tubercles small, somewhat woolly in their axils, 
weak, plumose, 3 to 7 mm. long; flowers white, small, 3 
line running down the center; seeds black. 
