NEOMAMMILLARI A . 



99 



Mammillaria nivea cristata Salm-Dyck (Walpers, Repert. Bot. 2: 270. 1843) is only a 

 name. M. nivea wendlei Pfeiffer (Labouret, Monogr. Cact. 57. 1853) was given as a 

 synonym of M. hicolor. 



To this relationship we would refer the plant which has long been known in collections 

 tmder the name of Mammillaria poiosina* and M. potosina var. longisphia. It resembles 

 M. celsiana in the spines, but the tubercles are milky and the stem is more elongated. 

 We have seen the following illustration: Mollers Deutsche Gart. Zeit. 25: 475. f. 8, No. 9, 

 as M. potosina. 



De Candolle (Prodr. 3: 459. 1828) referred here Cactus columnaris Mocifio and Sesse. 



Fig. 96. — Neomammillaria collinsii. 



Fig. 97. — Neomammillaria gerninisi>ina. 



Illustrations: Wiener 111. Gart. Zeit. 11: pi. 3, in part, as Mammillaria nohilis; Hort. 

 Beige 4: pi. I, as M. daedalea; Mollers Deutsche Gart. Zeit. 25: 475. f. 8, No. 4, as M. 

 bicolor nobilis; Cact. Joum. i: pi. for March, as M. nivea cristata; Cact. Joum. i: pi. for 

 March, as M. nivea longispina; Pfeiffer and Otto, Abbild. Beschr. Cact. i: pi. 3; De I/aet, 

 Cat. Gen. f. 50, No. 8; Wiener 111. Gart. Zeit. 29: f. 22, No. 8; Knippel, Kakteen pi. 19, as 

 M. hicolor. 



Plate V, figure 3, shows a flowering plant sent by Carl Ackerman which flowered in the 

 New York Botanical Garden, October 9, 1920; plate viii, figure 5, shows a plant which 

 flowered in the New York Botanical Garden, November 11, 191 1. Figure 97 is from a 

 photograph by Ernest Braunton showing a plant grown in southern California. 



44. Neomammillaria pyrrhocephala (Scheidweiler). 



Mammillaria pyrrhnccphala Scheidweiler, Allg. Gartenz. 9: 42. 1841. 



Mammillaria mallettiana Cels, Portef. Hort. 2: 222. 



Mammillaria senckei\ Forster, Handb. Cact. 227. 1846. 



Mammillaria pyrrhocephala dotikelaeri Sa.\m-T)yck, Cact. Hort. Dyck. 1849. 17, 121. 1850. 



Cactus pyrrhocephalus Kuntze, Rev. Gen. PI. i: 261. 1891. 



Cylindric; axils lanate and setose; tubercles angled, green or subglaucous; areoles bearing yel- 

 lowish wool; spines all black when young, when old becoming gray below; radial spines 6, spreading, 

 the upper ones a little longer; central spines single, erect; flowers red. 



Type locality: Real del Monte, Mexico. 

 Distribution: Hidalgo and, perhaps, Oaxaca. 



* This name is sometimes credited to Rebut (Mollers Deutsche Gart. Zeit. 25: 475: 1910) but if he published 

 it we are unaware of it. 



t This was originally written M. senkii, although the plant was named for F. Senke of Leipzig. 



