SUPPLEMENT. 
563 
MAMMILLARIA. To the species described on 
pp. 320-2, Vol. II., the following should now be added: 
M. barbata (bearded). fr. green, oblong, crowned with rudi- 
mentary flowers. Stem simple, depressed-globose ; axils of the 
tubercles naked; prickles radiating in several series, very nu- 
merous, about forty white, piliform outer ones, and ten to tifteen 
more robust inner ones, the central ones singularly robust, un- 
cinate, fuscous, erect. New Mexico, 1885. (R. G. 1208, a-c.) 
M. cornimamma (horny-nippled). fl. light yellow, with a 
purplish stripe on the back of all but the innermost segments, 
din, broad. Summer. Stem sub-globose, about 2sin. in 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. echinata (prickly). Stem often multiplex, cylindrical, elon- 
gated; tubercles naked, broad at base, very short, obtuse at 
apex; young areole 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. 1208, d-e.) 
M. echinus (hedgehog-like). fl. 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 Jin. long, arranged in 
thirteen spiral rows; spines white, radiating, with a central, 
spike-like one. Mexico. Warm house. See Fig. 32. 
re 
Mammillaria— continued. 
Fig. 54. MAMMILLARIA FISSURATA, 
M. fissurata (fissured). (fl. rose-coloured, 14in. 
Fic. 33. MAMMILLARIA ELEPHANTIDENS. 
M. elephantidens (elephant’s-tooth). jl. 3in. wide; sepals 
violet, with white margins; petals bright rose, purple at base, a 
line of purple extending down the middle; stamens numerous, 
with purple filaments and yellow anthers. Autumn. Stem 
globose-depressed, 6in. to 8in. in diameter, bright, shining green ; 
tubercles smooth, round, lin. long, furrowed across the top 
(which at first is filled with wool, but when old is naked), the 
base furnished with a dense tuft of white wool; spines recurved, 
radiating in groups of eight, springing from the furrows. Para- 
guay. See Fig. 33. 
wide, growing from the middle of the stem. 
September and October. Stem and rootstock 
shaped like a whiptop, the rootstock being thick 
-and woody ; tubercles arranged in a thick layer, 
spreading from the centre, rosette-like. Mexico, 
1885. This species resembles some of the Gas- 
terias. See Fig. 34. 
M. longimamma (long-nippled). _ fl. citron-yellow, large and 
handsome, the short tube hidden in the tubercles ; petals 1}in. 
long, narrow, pointed, all directed upwards; stamens short, 
numerous, Early summer. Stem seldom more than 4in. high, 
branching at the base when old; tubercles lin. long, 4in. in 
diameter, terete, slightly curved, narrowed to the apex, each 
crowned with a tuft of about a dozen spines. Mexico. See 
Pig. 35. 
M. macromeris (large-parted). fl. about 3in. long and wide, 
arising from the centre of the stem; petals carmine, almost 
