CACTEJE. I. MAMMILLAIUA. 



159 



Tj . D. S. Native of Mexico. Coulter, no. 22. Allied to M. 

 crebrisplna, and is perhaps M. cbnica, Haw. Flowers of a red- 

 dish-violaceous colour, few in number, rising near the top of the 

 stem. 



Conoid Mammillaria. PL \ foot. 



23 M. COMPRE'SSA (D. C. 1. c.) plant simple, cylindrically- 

 clavate ; axils when young woolly and bristly ; mammae ovate, 

 short, angular at the base, and as if they were compressed be- 

 neath, with the areolae rather tomentose ; prickles 4-5 in each 

 fascicle, unequal, white, lower one the longest. Tj . D. S. Na- 

 tive of Mexico. Coulter. Plant 5 inches high, an inch broad 

 at the base, and 1^ inch in diameter at the top. 



Compressed Mammillaria. PI. \ foot. 



24 M. coRtdrERA (D. C. 1. c.) plant simple, globose, with 

 naked axils ; mammae ovate, thick, crowded, with the areolae 

 smoothish ; outer prickles 16-17, radiating grey, with a strong, 

 longer, erect, rather incurved one in the middle of each fascicle. 



J? . D. S. Native of Mexico. Coulter. Plant 3 inches in dia- 

 meter, 2^ broad. Ray prickles 5-6 lines long, and the central 

 one 7-8 lines long. 



Horn-bearing Mammillaria. PI. ^ foot. 



25 M. CRINITA (D. C. 1. c.) plant globose, depressed, multiple 

 at the base ; axils naked ; mammas ovate, thick, with the areolae 

 smoothish ; bristles 15-20 in each fascicle, white, elongated, 

 rather radiating : central prickles yellow, stiff, hooked at the 

 apex, length of the bristles that surround them. T? . D. S. 

 Native of Mexico. Coulter, no. 28. Plant 1 inch high, l|. 

 inch in diameter. Bristles 8-9 lines long. 



Var. (3, paucisetce (D . C. 1. c.) axils woolly ; bristles 8-10 in 

 a fascicle. Sometimes the bristles are nearly all deciduous. 

 Coulter, no. 29. 



Hairy Mammillaria. PI. 1 inch. 



26 M. c^EspiTiTiA (D. C. 1. c.) plant multiple at the base, 

 tufted, aggregate, globose ; axils naked ; mammae few, ovate, 

 with the areolae smoothish ; prickles straight, stiff, when young 

 whitish-yellow, but in the adult state greyish : outer ones 9-11 

 in each fascicle, radiating, with 1-2 longer, erect, central ones. 

 Ij . D. S. Native of Mexico. Coulter. Tufts 4 inches broad. 

 Offsets an inch in diameter. 



Tufted Mammillaria. PI. foot. 



27 M. SUJBANGULA'RIS (D. C. 1. c.) plant simple or multiple at 

 the base, nearly globose, depressed ; axils for the most part 

 woolly ; mammae ovate, thick, short, angularly tetragonal from 

 pressing so close against each other, with the areolae of the young 

 ones tomentose ; prickles 6-8 in each fascicle, erectly diverging, 

 Unequal, of a pale grey colour. fj . D. S. Native of Mexico. 

 Coulter. Plant nearly 3 inches high and 1|- broad. Prickles 

 3-10 lines long. 



Subangular-teated Mammillaria. Clt. 1830. PI. -j foot. 



28 M. MACRACA'NTHA (D. C. 1. c. p. 113.) plant simple, glo- 

 bose, depressed, with some of the axils naked, and some of them 



>earded with wool ; mammae ovate, rather tetragonal, with the 

 ireolae of the young ones rather tomentose; prickles 1-2, very 

 ong, pungent, white, or brownish. Tj . D. S. Native of Mexico. 

 Coulter, no. 44. Perhaps the same as M. magnimfimma, Haw.? 

 ?rickles 2 inches long. Plant 1^-2 inches high, and 3-6 inches 

 n diameter. Prickles rather angular. 

 Long-spined Mammillaria. PI. -^ foot. 



29 M. LONGIMA'MMA (D. C. 1. c.) plant simple, or rather mul- 

 :iple at the base, ovate, or nearly cylindrical ; axils woolly ; 

 mammae ovate-oblong, dense, with the areolae tomentose ; prickles 

 )-10 in each fascicle, pungent, of a greenish brown colour. Tj . 



. S. Native of Mexico. Coulter, no. 30. Plant 3-4 inches 

 ligh, and 2 inches broad. Prickles 6-9 lines long. 

 Long-teated Mammillaria. PI. foot. 



30 M. OCTACA'NTHA (D. C. 1. c.) plant simple, ovate-oblong, 

 8 



nearly cylindrical ; axils naked ; mammae oblong, rather tetra- 

 gonal, with the areolae of the young ones rather tomentose ; 

 prickles stiff, the outer 7 in each fascicle radiating and white, 

 with a central one, which is stiffer, longer, and of a fuscescent- 

 colour. Jj . D. S. Native of Mexico. Coulter, no. 39. Plant 

 3 inches high, 2 inches broad. Outer prickles 3-4 lines long ; 

 central one 6 lines long. 



Eight-spined Mammillaria. PI. -| foot. 



31 M. LEUCACA'NTHA (D. C. I.e.) plant multiple at the base, 

 ovate; axils naked; mammae few, ovate-tetragonal, with the areolae 

 of the young ones glabrous ; prickles 6-7 in each fascicle, stiff, 

 white, sometimes all radiating, and sometimes the one in the 

 centre is erect. T? . D. S. Native of Mexico, Coulter. Plant 

 an inch and a half high, and hardly an inch broad. Prickles 4 

 lines long. 



White-spined Mammillaria. PI. ^ foot. 



32 M. DIVE'RGENS (D. C. 1. c.) plant multiple at the base, 

 nearly globose, depressed ; axils woolly and bristly ; mammae 

 ovate, crowded, with the areolae of the young ones woolly ; 

 prickles 5-6 in each fascicle, unequal, pungent, white, but 

 brownish at the apex, diverging, and somewhat tetragonal. ^ 

 D. S. Native of Mexico, Coulter. Perhaps only a variety of 

 M. macracdntha. Tufts 6-7 inches broad, and 2 inches high. 



Diverging -splned. Mammillaria. PI. -J foot. 



33 M. TRIACA'NTHA (D. C. 1. c.) plant simple, obovate, nearly 

 cylindrical, bluntly truncate ; axils hardly woolly, but with a few 

 bristles ; mammas ovate, much crowded, with the areolse of the 

 young ones tomentose ; prickles 3 in each fascicle, erect, white, 

 lower one the longest, tending downwards, 2 lateral ones very 

 short. Tj . D. S. Native of Mexico, Coulter, no. 46. Plant 

 3 inches high, and 1J inch broad. Sometimes there is a fourth 

 prickle in each bundle, but when this is present it is very short. 



Three-spined Mammillaria. PI. ^ foot. 



34 M. SEMPERVIVI (D. C. 1. c. p. 114.) plant simple, attenu- 

 ated at the base, depressed at the apex, disk-formed; axils 

 woolly ; mammae erect, ovate-tetragonal, with the areolae smooth- 

 ish ; bristles 3-4 in each fascicle, stiff, short, and white, and 2 

 thick, short, diverging prickles. Ty . D. S. Native of Mexico. 

 Coulter, no. 57. Plant 2^ inches broad, and 1-J high. 



Var. ft, tetracdntfia (D. C. 1. c.) plant densely bearded in the 

 axils ; bristles none ; prickles 4, short, diverging. Tj . D. S. 

 Native of Mexico. 



Sempervivum-like Mammillaria. PL ^ foot. 



35 M. DISCIFO'RMIS (D. C. 1. c.) plant simple, depressed, disk- 

 formed ; axils naked ; mammae crowded, short, depressed, tetra- 

 gonal, with the areolae of the young ones rather tomentose, and 

 of the adult ones somewhat unarmed ; prickles 5, in each cen- 

 tral mamma, stiff, white, erect, fj . D. S. Native of Mexico. 

 Coulter, no. 50. Plant 3 inches broad, and hardly an inch 

 high. 



Disk-formed Mammillaria. PL 1 inch. 



36 M. LATIMA'MMA (D. C. 1. c.) plant simple, depressed, 

 somewhat discoid : with the younger axils woolly ; mammae short, 

 broadly ovate, at length depressed, transversely oblong, with the 

 areolae of the young ones woolly ; prickles 16-17 in each fas- 

 cicle, stiff, yellowish, rather fuscescent at the apex, diverging, 

 unequal. Pj . D. S. Native of Mexico. Coulter, no. 54. 

 Plant 5 and a half inches in diameter, and hardly an inch and a 

 half high. 



Broad-teated Mammillaria. PL 1 inch. 



37 M. GEMINISPINA (Haw. in phil, mag. 63. p. 42. D. C. diss. 

 t. 3.) plant simple, cylindrically columnar ; axils very woolly ; 

 tubercles or mammas small, very numerous ; spines small, white, 

 interwoven, 2 of which in each fascicle are much longer than the 

 rest, fj . D. S. Native of Mexico. Cactus columnaris, Moc. 

 et Sesse, fl. mex. icon. ined. Plant half a foot high. Flowers 



