158 



CACTEJL. I. MAMMILLARIA. 



and bearing spines ; spines setaceous, divaricate, white, 2 of 

 which are erect in each fascicle, and much longer than the rest, 

 spaceolate at the apex. Tj . D. S. Native of Mexico, on the 

 mountains. 



Two-coloured Mammillaria. Clt. ? Shruh ^ foot. 



10 M. SIMPLEX (Haw. syn. 177.) plant simple, obovate ; axils 

 glabrous ; tubercles or mammae ovate, bearing stiff, straight, 

 radiating spines at the apex, fj D. S. Native of South Ame- 

 rica, and the islands. Cactus mammiHaris, Lin. spec. 666. D. C. 

 pi. grass, t. 3. Cat. hort. monsp. 83. Plant 6-8 inches long. 

 There are about 18 or 20 series of tubercles, winding to the 

 left. Spines shortish and red. Tomentum short, deciduous. 

 Axils, when young, rather tomentose. Flowers white. Berry red. 



Simple Mammillaria. Fl. Ju. Aug. Clt. 1688. Sh. |to| ft. 



11 M. PARVIMA'MMA (Haw. suppl. 72.) plant nearly globose, 

 proliferous at the top ; tubercles or mammae numerous, small, 

 clothed with white tomenturn at the apex, each terminating in 

 10 or 12 rather stiff, dark purple spines. 1. D. S. Native of 

 South America. Cactus microthele, Spreng. syst. 2. p. 494. 

 The character is from Salm-Dyck. in litt. 



Small-teated Mammillaria. Clt. 1817. PI. Jto foot. 



12 M. ELONGA'TA (D. C. mem. cact. in mem. mus. vol. 17. 

 p. 109.) plant usually multiple at the base, cylindrical, elon- 

 gated, a little branched, with the axils broad and naked ; mammae 

 or tubercles very short, broad at the base, obtuse at the apex, 

 with the areolae of the younger ones rather tomentose ; prickles 

 setiform, 16-18 in each fascicle, radiating, yellow, much longer 

 than the mammae, without any central ones. (7 . D. S. Native 

 of Mexico, where it was discovered and sent to Europe by Dr. 



1 Coulter, as well as all the following species. 



Elongated Mammillaria. Clt. 1830. PI. ^ foot. 



13 M. ECHINA'RIA (D. C. 1. c. p. 110.) plant usually multiple 

 at the base, cylindrical, elongated, with the axils broad and 

 naked ; mammae naked, very short, broad at the base, and ob- 

 tuse at the apex, with the areolae of the younger ones rather 

 tomentose ; prickles bristle-formed, 16-18 in a fascicle, radiating, 

 spreadingly recurved, yellow, much longer than the mammas, 

 with the 2 central ones stiffer and brownish. ^ . D. S. Native 

 of Mexico. Flowers bearded at the base, sessile in the axils, 

 small and pale. 



Hedgehog Mammillaria. Clt. 1830. PL foot. 



14 M. SUBCROCEA (D. C. 1. c.) plant usually multiple at the 

 base, cylindrical, with narrow, rather woolly axils; mammae 

 ovate, short, with the areolae of the younger ones rather tomen- 

 tose ; prickles bristle-formed, 16-18 in a fascicle, radiating, 

 yellow, longer than the mammae, but when old becoming copper- 

 coloured, without any central ones. Jj . D. S. Native of Mexico. 

 Coulter, no. 36. Flowers small, sessile, solitary in the axils of 

 the mammae, forming a circle round the top of the plant. Style 

 permanent ; stigma many-cleft. Berry ovate, about the size 

 of a pea, crowned by the floral remains. Plant 2-3 inches high, 

 and 9-11 lines in diameter, with 12-15 mammae in each series, 

 which series bend to the left. 



Subcroceous-sp'med Mammillaria. Clt. 1830. PI. ^ foot. 



15 M. TE'NUIS (D. C. 1. c.) plant multiple at the base, cylin- 

 drical, with narrow, naked axils ; mammas ovate, with the areolae 

 of the young ones rather woolly; prickles bristle-formed, 20-25 

 in a fascicle, yellow, radiating, a little longer than the mammae, 

 without any central ones. ^ . D. S. Native of Mexico. Coul- 

 ter, no. 34. Plant 3-4 inches high, and 5 lines in diameter. 



Var. ft, media (D. C. 1. c.) stem thicker ; central prickles 

 wanting or solitary. Tj . D. S. Native of Mexico. Plant 10- 

 1 2 lines in diameter. Perhaps a proper species, or perhaps M. 

 ctespitdsa, Hort. berol. according to Salm-Dyck. 



Slender Mammillaria. Clt. 1 830. PI. ^ foot. 



16 M. INTERTE'XTA (D. C. 1. c.) plant multiple at the base 



cylindrical, with narrow axils ; mammae ovate, much crowded 

 hidden by the congeries of prickles, with the areolae smoothish ; 

 prickles 20-2.5 in a fascicle, stiff, yellow, radiating, interwoven 

 from the mammae being so close together. Tj . D. S. Native 

 of Mexico. Coulter, no. 37. Plant 4 inches high, and 



1 inch in diameter. Prickles 3-4 inches long, sometimes some- 

 what echinated. According to a letter received from Dr. Coul- 

 ter to De Candolle, this and the 4 preceding species will form, 

 as he conceives, only one species ; the appearance of these 

 plants have a striking likeness to each other, but these differences 

 appear to De Candolle real, and permanent, and he considers 

 them as forming a small group of the genus, remarkable for the 

 elongation of their stems, and for their yellow appearance. 



Inlerjvoven-spined Mammillaria. Clt. 1830. PI. ^ foot. 



17 M. CYLINDRICA (D. C. 1. c. p. 1 1 1 .) plant simple, cylin- 

 drical, with a few bristles in the axils ; mammae ovate, with 

 smoothish areolaa ; bristles 20-25, in a fascicle, radiating, white, 

 shorter than the mammae : the 2 central prickles stiff and diverg- 

 ing, twice the length of the surrounding bristles. Tj . D. S. 

 Native of Mexico (Coulter). This plant is easily distinguished 

 from all the preceding, in the colour of the mammae being deep 

 green, not yellow. Plant 5 inches high, and 1 inch in diameter. 

 Bristles l-j-2 lines long, and the central prickles 3-4 lines long. 



Cylindrical Mammillaria. PI. \ foot. 



18 M. E'LEGANS (D. C. 1. c.) plant simple, obovate, somewhat 

 umbilicate at the apex, with naked axils ; mammae ovate, having 

 the areolae of the young ones rather tomentose ; bristles 25-30 in 

 each fascicle, white, radiating, stiffish, and with 1-3 stiff, erect 

 prickles, which are a little longer than the bristles that surround 

 them, fj . D. S. Native of Mexico. Coulter, no. 48. Plant 



2 inches high and 2 inches in diameter. 



Var. ft, minor (D. C. 1. c.) plant exactly obovate, one half 

 smaller than the species, but it is probably a young plant of the 

 same, 



Var. y, globosa (D. C. 1. c.) plant larger, globose, with the 

 upper axils bearded. Perhaps the same, but an old plant. 



Elegant Mammillaria. PI. -| foot. 



19 M. RA'DIANS (D. C. 1. c.) plant simple, nearly globose, with 

 naked axils ; mammae ovate, large, with the areolae smoothish ; 

 prickles 16-18 in a fascicle, radiating, white, stiff, when young 

 rather tomentose, without any central ones. T; . D. S. Native 

 of Mexico. Coulter, no. 35. There are varieties of this plant 

 either with an obtuse or a depressed apex, and the spines either 

 white or yellowish. Plant about 3 inches high, and the same 

 in diameter. Prickles 5-6 lines long. 



Radiating-prickled Mammillaria. PI. -j foot. 



20 M. IRREGULA'RIS (D. C. 1. c.) plant multiple, and rather 

 tuberous at the base, with ovate offsets, and naked axils ; mammae 

 oblong, with smoothish areolse ; bristles 20-25 in each fascicle, 

 white, a little reflexed, without any central prickles, fj . D. S. 

 Native of Mexico. Coulter, no. 31. Plant 2 inches high, with 

 offsets an inch in diwneter. Bristles 2 lines long. 



Irregular Mammillaria. PI. -J foot. 



21 M. CREBRISPINA (D. C. 1. c.) plant multiple at the base; 

 offsets ovate ; axils naked ; mammae ovate, short, crowded, with 

 the areolae smoothish ; prickles straight, outer 16-17 radiating 

 and white, central 3 brown and erect, fj . D. S. Native of 

 Mexico. Coulter, no. 14. Plant 2 inches high and 1$ inch in 

 diameter. The prickles, from the mammee being close, nearly 

 hide the stem. 



Thick-spined Mammillaria. PI. 2 inches. 



22 M. CONOIDEA (D. C. 1. c. p. 112.) plant simple, ovate-coni- 

 cal, with the axils woolly in the young state ; mammas ovate, 

 crowded, with the areolae rather tomentose while young ; prickles 

 straight, stiff, the outer 15-16 radiating, but the central 3-5 are 

 erectly diverging, brown, and rather longer than the ray ones. 



