- 1900 SUPPLEMENT—RECENT INTRODUCTIONS, &C. 515 
Mammillaria—continued. 
To the species described on pp. 320-2. Vol. IL, the 
following shonld be added. There are a host of names in 
Continental catalogues, but, as in the work proper, we 
haye confined our attention to species and varieties actually 
in commerce here. 
M. acanthophlegma (watery-spined). A synonym of W. elegans. 
M. Alversoni (Alverson’s). A variety of MM. radiosa. 
M. angularis. The correct name is M. compressa. 
M. applanata. The correct name is M. Heyderi. 
M. arizonica (Arizona). A variety of M. radiosa. 
M. atrata. The correct name is M. rhodantha. 
M. aulacothele (furrow-nippled). A synonym of MW. microihele. 
M. autumnalis (autumnal) A synonym of WM. mutabilis. 
Fic. 548. MAMMILLARIA COMPACTA. 
M.barbata (hearded).* #. rosy-pink, lin. in diameter. fr. green, 
oblong, crowned with rudimentary flowers. Stem simple, 
depr ssed-globose ; ax of the tubercles naked; prickles 
radiating in several series, very numerous, about forty white, 
hair-like outer ones, and ten to fifteen more robust inner ones, 
the central ones singularly robust, uncinate, fuscous, erect. 
New Mexico, 1885. (R.G.,t. 1208, a-c, & t. 1400.) 
M. bicolor nivea (snowy). Stem obovate, proliferous; 
tubercles conical, woolly and spine-bearing at apex, the axils 
woolly; outer spines white, appressed, hair-like, the inner 
four white, fuscous at apex, the longest lin. long. Mexico. 
M. bocasana (Bocas).* Stems globose, less than 2in. hi 
tubercles set in long, axillary, white wool; radial spin 
white and hair-like, the central four red, one of them hooked. 
Mexico. Stove. There is a variety splendens. 
M. Brownii (Brown's). A synonym of M. robustispina. 
M. Caput-Medusz is a form of M. Sempervivi. 
M. Carretii (Carreti’s). 1. whitish, with rosy-streaked petals. 
Summer. Stem simple, rather small, depressed-globose ; radial 
spines yellowish, rather long, spreading recurved, and inter- 
woven. Mexico, 
M. centricirrha (hooked cirrhi). /. reddish-carmine. Stem 
proliferous; tubercles pyramidal, quadrangular; spines irregular, 
usually with four to twenty-four radials and one central; 
radial spines short, straight or curved, awl-shaped, Zin. long; 
central ones longer and stouter; young spines yellow. Mexico. 
Syn. M. Schmidtii. - 
M. chlorantha (yellow-flowered). A form of M. radiosa 
M. cirrhifera longispina (cirrhi-bearing). A synonym of 
M. mutabilis. 
M. compacta (compact). fl. yellow, tinged with brown outside, 
terminal, large. Stem globose, solitary; spines comb-like, all 
radial, whitish. Mexico. Allied to M. pectinata. See Fig. 548. 
M. compressa (compressed). The correct name of M. angularis. 
M. cornifera (horn-bearing). . unknown. fr. red, Zin. long. 
Stem globose, 3in. in diameter; tubercles oblong-ovate, 3in. 
long, crowded, the younger ax woolly; radial spines fifteen 
to twenty rigid and horny, curved or straight, reflexed, 
yellowish, very sharp, 4in. long, the central one stouter and 
slightly deflexed, or sometimes wanting. Southern Mexico, 
1845. Syns. M. de@monoceras, M. impexicoma. 
Mammillaria—conlinued. 
M. cornimamma (horny-nippled). 7. light yellow, with a 
purplish stripe on the back of all but the innermost - 
ments, 3in. broad. Summer. Stem sub-globose, about 2 
diameter, greyish-green, the axils and areole of the younger 
tubercles densely white-woolly ; tubercles large, conical, grooved 
down the upper face; outer spines 10in. to 134in. long, tipped 
brown, the inner ones one to three, dark brown, stouter and 
longer. Native country unknown, 1887. 
M. crassispina (thick-spined).* jl. red. Late summer. Stem 
simple, ovate-columnar, shining green; tubercles cylindrical- 
conical, the axils almost naked; radial prickles twenty-four 
to twenty-seven, whitish, rigid, diaphanous, somewhat fascicled, 
much spreading, the inner six or seven irregula disposed, 
with a central, nearly erect one, pink at base. Mexico. Very 
pretty; one of the best. 
M. dzmonoceras (demon’s-horn). A synonym of M. cornifera. 
M. dasyacantha (thick-spined).* . small, ruby-like, springing 
from the centre. Stem 2in. to din. high, almost globular, 
covered with spiral whorls of tiny tubercles; spines arranged 
in little stars, with an erect central one. Mexico. <A pretty 
Thimble Cactus. 
M. deaibata (whitened). The correct name of M. Peacocki. 
M. densa (thick) Though frequently catalogued as a species, 
this is but a variety of M. elongata. 
M. deserti (desert-loving). A variety of WM. radiosa. 
M. discolor (two-coloured). jl. rose-purple, less than lin. wide, 
very short. Stem globose, about 4in. in diameter ; tubercles 
smooth, egg-shaped, their bases embedded in white wool, their 
tips crowned with stellate tufts of short, reddish spines. 
Mexico, 1829. 
M. echinata (prickly).* Stem often multiplex, cylindrical, 
elongated ; tubercles naked, broad at base, very short, obtuse 
at apex; young areolie slightly tomentose; prickles bristle-like, 
sixteen to eighteen, radiating, spreading-recurved, yellow, much 
longer than the tubercles, the two central ones rigid, slightly 
fuscous. Mexico, 1885. (R. G., t. 1208, d-e.) By some this is 
regarded as a stout variety of M. Halei. 
M. Echinus (hedgebog-like). jl. yellow, nearly 2in. long, cup- 
shaped, produced two or three together at the top of the stem. 
June, Stem about the size and shape of a small hen’s-egg, 
completely hidden by the spines; tubercles 4in. long, arranged 
in thirteen spiral rows; spines white, radiating, with a central 
spike-like one. Mexico. Warm house. See Fig. 549 
Fic. 549. MAMMILLARIA ECHINUS. 
M. elegans (elegant).* jl. rarely borne in cultivation. Stem 
globose, 2in. high; tubercles small, conical, when young 
woolly at the tips; spines about twenty, whitish with brown 
tips, short and slender, arranged in a star on each tubercle, 
with four*rather longer central ones. Mexico, 1850, _ SYNs. 
M. acanthophlegma, M. Klugii, and M. Potosina (of gardens). 
M. elephantidens (elephant’s-tooth). jl. Sin. wide; sepals 
violet, with white margins ; petals bright rose, purple at base, a 
line of purple extending down the middle; stamens numerous, 
