ON tl Te SS 
CACTEA., 
hk. D. S. Native of Mexico. Coulter, no. 22. Allied to M. 
crebrispina, and is perhaps M. cónica, Haw. Flowers of a red- 
dish-violaceous colour, few in number, rising near the top of the 
stem. 
Conoid Mammillaria, PI. 4 foot. 
23 M. compre’ssa (D. C. 1l. c.) plant simple, cylindrically- 
clavate; axils when young woolly and bristly ; mamme ovate, 
short, angular at the base, and as if they were compressed be- 
neath, with the areolze rather tomentose; prickles 4-5 in each 
fascicle, unequal, white, lower one the longest. k.D.S, Na- 
tive of Mexico. Coulter. Plant 5 inches high, an inch broad 
at the base, and 14 inch in diameter at the top. 
Compressed Mammillaria. Pl. 4 foot. 
24 M. cornirera (D. C. l. c.) plant simple, globose, with 
naked axils; mamme ovate, thick, crowded, with the areolz 
smoothish ; outer prickles 16-17, radiating grey, with a strong, 
longer, erect, rather incurved one in the middle of each fascicle. 
hk. D. S. Native of Mexico. Coulter. Plant 3 inches in dia- 
meter, 24 broad. Ray prickles 5-6 lines long, and the central 
one 7-8 lines long. 
Horn-bearing Mammillaria. PI. 4 foot. 
25 M. crinira (D.C. 1. c.) plant globose, depressed, multiple 
at the base ; axils naked ; mamme ovate, thick, with the areolze 
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. bh. D. S. 
Native of Mexico. Coulter, no. 28. Plant 1 inch high, 14 
inch in diameter. Bristles 8-9 lines long. 
Var. b, pauciséte (D.C.1. c.) axils woolly ; bristles 8-10 in 
a fascicle. Sometimes the bristles are nearly all deciduous. 
Coulter, no. 29. 
Hairy Mammillaria. Pl. 1 inch. 
26 M. czsriritia (D. C. 1. c.) plant multiple at the base, 
tufted, aggregate, globose; axils naked; mamme few, ovate, 
with the areolz 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. 
h.D.S. Native of Mexico. Coulter. Tufts 4 inches broad. 
Offsets an inch in diameter. 
Tufted Mammillaria. Pl. 4 foot. 
27 M. susanevra‘ris (D. C. 1. c.) plant simple or multiple at 
the base, nearly globose, depressed; axils for the most part 
woolly ; mamme ovate, thick, short, angularly tetragonal from 
Pressing so close against each other, with the areole of the young 
Ones tomentose ; prickles 6-8 in each fascicle, erectly diverging, 
unequal, of a pale grey colour. h. 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. 4 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 
bearded with wool; mamme ovate, rather tetragonal, with the 
areolz of the young ones rather tomentose ; prickles 1-2, very 
ong, pungent, white, or brownish. h.D.S. Native of Mexico. 
oulter, no. 44. Perhaps the same as M. magnimimma, Haw.? 
Prickles 2 inches long. Plant 14-2 inches high, and 3-6 inches 
in diameter, Prickles rather angular. 
Long-spined Mammillaria. PI. 4 foot. 
_ 29 M. roncma'mma (D. C. 1. a plant simple, or rather mul- 
tiple at the base, ovate, or nearly cylindrical ; axils woolly ; 
mamme ovate-oblong, dense, with the areola tomentose ; prickles 
9-10 in each fascicle, pungent, of a greenish brown colour. H 
). S. Native of Mexico. Coulter, no. 30. Plant 3-4 inches 
high, and 2 inchesbroad. Prickles 6-9 lines long. 
Long-teated Mammillaria. PI. 4 foot. 
0 M. ocraca’ytua (D. C. 1. c.) plant simple, ovate-oblong, 
8 
I. MAMMILLARIA. 
159 
nearly cylindrical ; axils naked ; mammæ oblong, rather tetra- 
gonal, with the areolæ 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. h. 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. 
Light-spined Mammillaria. Pl. 4 foot. 
31 M. reucaca’ntua (D.C. l.c.) plant multiple at the base, 
ovate; axils naked; mamme few, ovate-tetragonal,with the areola 
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. h.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. Pl. 4 foot. 
32 M. pive’rcens (D, C. 1. c.) plant multiple at the base, 
nearly globose, depressed; axils woolly and bristly; mammæ 
ovate, crowded, with the areolæ of the young ones woolly ; 
prickles 5-6 in each fascicle, unequal, pungent, white, but 
brownish at the apex, diverging, and somewhat tetragonal. h. 
D. S. Native of Mexico, Coulter. Perhaps only a variety of 
M. macracántha. Tufts 6-7 inches broad, and 2 inches high. 
Diverging -spined Mammillaria. P1. 4 foot. 
33 M. rriaca’ntHA (D.C. 1. c.) plant simple, obovate, nearly 
cylindrical, bluntly truncate ; axils hardly woolly, but with a few 
bristles ; mammæ ovate, much crowded, with the areolæ of the 
young ones tomentose; prickles 3 in each fascicle, erect, white, 
lower one the longest, tending downwards, 2 lateral ones very 
short. h. D. S. Native of Mexico, Coulter, no. 46. Plant 
3 inches high, and 13 inch broad. Sometimes there is a fourth 
prickle in each bundle, but when this is present it is very short. 
Three-spined Mammillaria. Pl. 4 foot. 
34 M. semrerRvìvi (D.C. l.c. p. 114.) plant simple, attenu- 
ated at the base, depressed at the apex, disk-formed; axils 
woolly; mamme erect, ovate-tetragonal, with the areolæ smooth- 
«ish; bristles 3-4 in each fascicle, stiff, short, and white, and 2 
thick, short, diverging prickles. h.D. S. Native of Mexico. 
Coulter, no. 57. Plant 24 inches broad, and 14 high. ` 
Var. P, tetracdntha (D.C. 1. c.) plant densely bearded in the 
axils; bristles none; prickles 4, short, diverging. k. D. S. 
Native of Mexico. 
Sempervivum-like Mammillaria. Pl, 4 foot. 
85 M. pisciro'rmis (D.C. |. c.) plant simple, depressed, disk- 
formed; axils naked; mammæ crowded, short, depressed, tetra- 
gonal, with the areolæ of the young ones rather tomentose, and 
of the adult ones somewhat unarmed ; prickles 5, in each cen- 
tral mamma, stiff, white, erect. h.D.S. Native of Mexico. 
Coulter, no. 50. Plant 3 inches broad, and hardly an inch 
high. 
Dick formed Mammillaria. PI. 1 inch. 
36 M. tatima’mma (D. C. l. c.) plant simple, depressed, 
somewhat discoid : with the younger axils woolly ; mamme short, 
broadly ovate, at length depressed, transversely oblong, with the 
areolæ of the young ones woolly ; prickles 16-17 in each fas- 
cicle, stiff, yellowish, rather fuscescent at the apex, diverging, 
unequal. h. 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. PI. 1 inch. 
37 M. ceminisvina (Haw. in phil. mag. 63. p. 42. D. C. diss. 
t. 3.) plant simple, cylindrically columnar; axils very woolly ; 
tubercles or mammz small, very numerous; spines small, white, 
interwoven, 2 of which in each fascicle are much Jonger than the 
reste h.D.S. Nativeof Mexico. Cáctus columnaris, Moc. 
et Sesse, fl. mex. icon. ined. Plant half a foot high. Flowers 
