N^OMAMMILLARI A . 



133 



Mammillaria depressa was credited by mistake to De Candolle by Pfeiffer in listing the 

 synonyms of M. discolor (Enum. Cact. 28. 1837). 



Mammillaria confinis Haage, according to Pfeiflfer (Enum. Cact. 28. 1837), appeared 

 in "Haage, Catal. Cact. 1836" and he lists it as a synonym of M. albida. 



Mammillaria canescens Hortus (Pfeiffer, Enum. Cact. 28. 1837) was given as a synonym 

 of M. discolor. This is different from M. canescens Jacobi (Allg. Gartenz. 24: 89. 1856) 

 which Schumaim lists among his unknown plants. (See also Lemaire, Cact. Gen. Nov. 

 Sp. 99. 1839.) 



Mammillaria coniflora Hortus and M. discolor coniflora Salm-Dyck (Cact. Hort. 

 Dyck. 1849. II. 1850) are only names which belong here. 



Mammillaria discolor fulvescens Salm-Dyck (Cact. Hort. Dyck. 1844. 7. 1845) was not 

 formally published at the place here cited. 



Mammillaria discolor breviflora (Forster, Handb. Cact. 206. 1846), although not 

 described at the place here cited, is usually referred here. 



Cactus pseudomammillaris appeared simply as a name in 1815 (Desfontaines, Tab. 

 Bot. ed. 2. 191), and again in Pfeiffer's Enumeratio (28. 1837) as a synonym of Mammil- 

 laria discolor prolifera. Pfeiffer credits the name to Salm-Dyck and gives the reference to 

 Allgemeine Gartenzeitung (3: 57. 1835), but the name appeared there under Mammillaria 

 along with spinii and canescens. M. spinii, credited to Colla, is given by Salm-Dyck 

 (Cact. Hort. Dyck. 1849. 11. 1850) as a synonym of M. discolor. 



Schumann lists Mammillaria rhodacantha Salm-Dyck (Cact. Hort. Dyck 1849. 96. 

 1850) among his unknown species. M. rhodacantha pallidior (Salm-Dyck, Cact. Hort. 

 Dyck. 1844. 8. 1845) is only a name, while M. discolor rhodacantha (Walpers, Repert. Bot. 

 2: 271. 1843), although never described, seems to be the same as M. rhodacantha. 



Illustrations: Mem. Mus. Hist. Nat. Paris 17: pi. 2, f. 2: Ann. Inst. Roy. Hort. 

 Fromont 2: pi. i, f. A; Loddiges, Bot. Cab. 17: pi. 1671 (?), as Mammillaria discolor; Mem. 

 Accad. Sci. Torino 33: pi. 11, as Cactus spini. 



Figure 144 is reproduced from the first illustration cited above. 



Fig. 145. — Neomammillaria fragilis. 



Fig. 146. — Neomammillaria elongata. 



95. Neomammillaria fragilis (Salm-Dyck). 



Mammillaria fragilis Salm-Dyck, Cact. Hort. Dyck. 1849. 103. 1850. 



Stems usually oblong or club-shaped, sprouting freely towards the top; branches globose and 

 breaking off at the slightest touch; tubercles bright green, terete, their axils nearly naked; radial 

 spines 12 to 14, white, naked, spreading; central spines usually wanting, especially on branches, if 

 present i or 2, elongated, erect, brownish especially at tip; young spine-areoles with white wool; 

 flowers from upper part of plant but not from center, small, lasting for several days ; cream-colored 

 with outer segments somewhat pinkish; petals broad with a mucronate tip; filaments and style pale. 



