132 THE CACTACEAE. 



tips, puberulent when young; central spine i, much longer than the radials, erect or ascending, 15 

 to 18 mm. long, dark brown; flower-buds pinkish, acute; flower 15 mm. long, broadly funnel-shaped; 

 inner perianth-segments nearly white or faintly tinged with pink, acute ; filaments white to pinkish ; 

 stigma-lobes 4, white or pinkish, slender, filiform. 



Type locality: Not cited. 



Distribution: San Luis Potosi. 



The above description is drawn from plants growing in the top of Calihanus caespitosus, 

 a curious, globose, lilliaceous plant of the desert of central Mexico, sent by Dr. E. Palmer 

 from San Luis Potosi in 1 905 . 



Schumann says that the axils of the tubercles are naked, while K. Brandegee describes 

 them as bearing bristles as in our plant and so called for in the original description. 



In some plants one or two of the upper radial spines are brown like the central spine ; 

 the flowers are delicately fragrant, remaining open during cloudy days. In cultivation 

 this is one of the earliest species to flower; in 19 18 it began to bloom early in January. 



Mammillaria inuncinata (Lemaire, Cact. Gen. Nov. Sp. 39. 1839) was never described 

 but belongs here. 



Mammillaria ancistroides inuncinata Lemaire and M. deficum (Forster, Handb. Cact. 

 185. 1846), as synonyms, were referred here. M. deficiens Hortus (Salm-Dyck, Cact. Hort. 

 Dyck. 1849. 7. 1850) is another name, used only as a synonym of this species. 



Illustrations: Schumaim, Gesamtb. Kakteen 528. f. 88 ; Knippel, Kakteen pi. 20; Schelle, 

 Handb. Kakteenk. 249. f. 169; Blanc, Cacti 68. No. 1200, as Mammillaria decipiens. 



Plate XIV, figure 3, is from a plant sent to the New York Botanical Garden by Wein- 

 berg in 1903, which flowered November 14, 191 1. 



94. Neomammillaria discolor (Haworth). 



Mammillaria discolor Haworth, Syn. PI. Succ. 177. 1812. 



Cactus depressus De Candolle, Cact. Hort. Monsp. 84. 1813. Not Haworth, 1812. 



Cactus pseudomammillaris Salm-Dyck, Liste PI. Gr. 1:1. 1815. 



Cactus spini CoUa, Mem. Accad. Sci. Torino 33: 133. 1826. 



Mammillaria pseudomammarillaris Pfeiffer, Allg. Gartenz. 3: 57. 1835. 



Mammillaria discolor prolifera Pfeiffer, Enum. Cact. 28. 1837. 



Mammillaria albida Haage in Pfeiffer, Enum. Cact. 28. 1837. 



Mammillaria aciculata Otto in Pfeiffer, Enum. Cact. 29. . 1837. 



Mammillaria discolor monstrosa Monville in Lemaire, Cact. Gen. Nov. Sp. 99. 1839. 



Mammillaria discolor albida Salm-Dyck, Cact. Hort. Dyck. 1844. 7. 1845. 

 ? Mammillaria curvispina Otto in Dietrich, Allg. Gartenz. 14: 204. 1846. 

 ? Mammillaria discolor pulchella Otto in Forster, Handb. Cact. 206. 1846. 



Mammillaria curvispina parviflora A. Dietrich, Allg. Gartenz. 14: 204. 1846. 



Mammillaria nitens Otto in Linke, Allg. Gartenz. 16: 331. 1848. 



Mammillaria pulchella Otto in Einke, Allg. Gartenz. 16: 331. 1848. 



Mammillaria discolor aciculata Salm-Dyck, Cact. Hort. Dyck. 1849. 11. 1850. 



Mammillaria discolor curvispina Salm-Dyck, Cact. Hort. Dyck. 1849. 11. 1850. 



Mammillaria discolor nitens Salm-Dyck, Cact. Hort. Dyck. 1849. 11. 1850. 



Mammillaria polythele aciculata Salm-Dyck, Cact. Hort. Dyck. 1849. 15. 1850. 



Mammillaria pulchella nigricans Monville in Labouret, Monogr. Cact. 40. 1853. 



Cactus aciculatus Kuntze, Rev. Gen. PI. i: 260. 1891. 



Cactus discolor Kuntze, Rev. Gen. PI. i: 260. 1891. 



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



Globose or somewhat depressed, often solitary, about 7 cm. in diameter; tubercles ovoid-conic, 

 arranged in 13 to 15 spirals, their axils naked; radial spines 16 to 20, white, setaceous, widely spread- 

 ing; central spines about 6, stouter than the radials, straight, at first black with white bases; flowers 

 15 mm. broad when fully open; iimer perianth-segments linear, white, with a violet-rose stripe; 

 fruit red, 2.5 cm. long. 



Type locality: Not cited. 



Distribution: Puebla, according to Schumami. 



We have been unable to identify definitely this species. As there seems to be no type 

 preserved we must rely upon the short original description and the early illustrations. The 

 illustration of Loddiges (Bot. Cab. 17: pi. 1871) shows a plant with yellowish-brown spines 

 and must belong elsewhere. 



