Supplement. 



563 



MAMMILLARIA. To the species described on 

 pp. 320-2, Vol. II., the following: ghonld now be added: 



M. barbata (bearded), jr. green, oblong, crowned with rudi- 

 mentary flowers. Stem simple, depressed-globose ; axils of the 

 tubercles naked ; pnckles 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- 

 ornate, fuscous, erect. New Mexico, 1885. (R. G. 1208, a-c.) 



M, cornimamma (horny -nippled). fi. light yellow, with a 

 purplish stripe on the back of all but the innermost segments, 

 3in. broad. Summer. Stem sub-globoae, about 2iin. in diameter, 

 greyish-green, the axils and areolae of the younger tubercles 

 densely white-woolly ; tubercles large, conical, grooved down the 

 upper face; outer spines lOin. to 15^in. 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 areolae slightly tomentose ; pnckles bristle-like, 

 sixteen to eighteen, radiating, spreading-recurved, yellow, much 

 longer than the tubercles, tiie two central ones rigid, slightly 

 fuscous. Mexico, 1885. (R. a. 1208, d-e.) 



M. ecbinus (Iiedgehog-like). /. yellow, nearly 2in. long, cup- 

 shaped, produced two or three together at the top of the stem. 

 June. Stem about tlie size and shape of a small hen*s-egK, 

 completely hidden by the spines ; tubercles j^in, long, arranged in 

 thirteen spiral rows ; spines white, radiating, with a central, 

 spike-like one. Mexico. Warm house. See Fig. 52. 



Mammillaria — co nfinued 



Fig. 54. Mammfixaria FrssrRAXA. 



Fig. 33. MAMMILLlRrA elephantidens. 



Id, elephantidens (elephant's-tooth). /, 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 tilamenta and yellow anthers. Autumn, Stem 

 globose-depressed, 6in. to Sin. in diameter, bright, shining green ; 

 tubercles smooth, round, liin. long, furrowed across the top 

 (which at first is tiled 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. 



M. fissurata (fissuredX /. roue-coloured, liin. 

 ■wide, growing from the mifblle of the stem. 

 September and October. Stem and rootstock 

 shaped like a whiptop, the rootstock being thick 

 and woody ; tubercles arranged in a thick la^"er, 

 spreading from the centre, rosette-like. Mexico, 

 1885. This species resembles some of the Gas- 

 terias. See Fig. 34. 



M, longimamxna (long-nippled). /f. citron-yellow, large and 



handsome, the short tube hidden in the tubercles ; petals Uin. 



long, narrow, pointed, all directed upwards; stamens short, 



numerous. Early summer. Stem seldom more tlian 4in. high, 



branching at the base when old 



diameter, terete, slightly curved, 



crowned with a tuft of about a 



Fig. 35. 

 Bf, xnacromeris (large-partedX A about 3in. long and wide, 



arising frum the centre of the stem ; petals carmine, almost 



tuberclen lin. long, ^in. in 

 narrowed to the apex, each 

 dozen spines. Mexico. See 



