MAMMILLARIA 



MAJLMILLARIA 



978 



BB. Spines one or more hooked a7id 



cevtral, except in M. pusilla 



and M, dioica insularis. 



c. Jiristies one or more found 



in the axils between the 



tubercles 40. pusilla 



41. Bocasana 



42. Wildii 



4:i. tetrancista 



44. dioica 



45. armillata 

 CC. Bristles none in the axils, 



except perhaps in M. Car- 



retii 4(i. Wrightii 



47. Goodricliii 



48. Grahami 

 W. venusta 

 .'>0. Uainse 

 31. Carretii 



AA. jHivf ntilkif none infhe tubercles, 

 htil fniinil 'If f') he suspected in 

 thi- ho. III. .\i> hooked spines, 

 liiidiiil siiiiirs Uss than 15; 

 centrals iixiiallij 1. 



B. FIs. yellow 52. eriacantha 



BB. FIs. blood-red .5:!. sphacelata 



BBB. FIs. carmine 54. spinosissima 



55. rhodantha 

 5(j. dolichocentra 

 57. discolor 

 5H. Lesaunieri 

 5(1. 



00. 



i. Juice mi Ik If cxH(lfn(i from 



iroiiiiil., ill ,11111 piirt'of the 



jiliiiil: shins not ilnniiuted: 



tiihirrli's iisKiilhi iniiiulur: no 



hvulcvd spines, except in M. un- 



cinuta. Section Lactescentes . 



B. FIs. red or purple or carmine, 



—said to be yellow in Park- 



insonii. 



c. Spines terete: r a dials 



white, setaceous, numer- 



Otis, inlerworen and cov- 



erintj the fihint: stems at 



length ci/lindriial arclar- 



ate: axils icoollij (il.bicolor 



i;2. Farkinsonii 

 I3:i. tormosa 

 CC, Spines fete, stouter, often 

 angular, some of the cen- 

 trals very long and more 

 or less flexuous : tuber- 

 cles rather large, angled: 



axils woolly M. axillaris 



(J5. centricirrha 

 (ill. mutabilis 

 67. Heeseana 

 BB. FIs. whitish, yelloicish or 

 flesh-color. 

 C. Radial spines 9-22, seldom 

 less than 12: tubercles 

 slender, scarcely angled. 68. simplex 



69. Brandeirei 



70. Eeyderi 

 CO. Madial spines rarely as 



many as 9: body mostly 



depressed 71 . melacantha 



72. camea 

 71!. uncinata 



74. Trohartii 



75. sempervivi 



76. Caput-Medusae 



77. micromeris 



ucanthophleijma. 



INDEX. 



aulacothele, 2. 

 aureiceps, 55. 

 autumnalis, 6G, 

 Imrbata. 37 

 hicolor. 61. 

 Bocasana, 41. 

 hnrealis, 20. 

 Bnincleeei. 69. 



Brownii. 6. 

 calcarnta, 14. 

 (•.■imlida. M. 

 Capnt-MedusaB, 



1. raphidacAntlia, Lera, Stems becoming 1 ft, or more 

 long, 2-3 in, in diam,, often clavate: tubercles erect- 

 spreading, somewhat flattened, often with 1 or 2 glands 

 in the groove: spines yellow in the young state, soon 

 gray; radials6-10; central 1, longer and stouter, straight 

 or hooked in the same plant : tls, about 1 in, broad. 

 San Luis Potosi, Mex. — The more constantly hooked 

 form is M. ancistracantha, Lem. 



2. macrothSIe, Mart. {M. aulacothele, Lem, 3f. Le'h- 

 miinni, Ottoi. Stems stout, attaining nearly 2 ft. in 

 hoiglit by 4 in. in diam.: tubercles long, conical, at first 

 upright, in age becoming even deflexed: spines all yel- 

 low: radials 6-8, spreading; centrals 1-2, longer and 

 stouter: fls. lH-2 in. broad. Central Mex. 



3. erecta, Lem. Branching from base and from de- 

 cumbent stems, attaining 12 in. or more in height by 3 

 in. in diam., bright green: tubercles conical, short, up- 

 right: spines all yellow; radials 8-13 ; centrals 4 or 

 less: fls. 2-2!^ in. in diam. Cent. Mex. — In the groove 

 close to the spines is often found, especially in the 

 flowering area, a conspicuous honey gland. 



4. recury&ta, Engelra. (M. recurvispina, Engelm, 

 M. NogaUnsis, Range), Stems depressed-globose and 

 often deeply concave, 6-8 in, in diam., forming large 

 masses 1-3 ft. in diam.: tubercles short, with usually a 

 large gland in the groove near the apex: spines yellow 

 or whitish, stiff, recurved-pectinate, interwoven and 

 covering the whole plant ; radials 18-20 ; central 1, 

 rarely 2, recurved: fls. about 1 in. long, brownish out- 

 side. Near Nogales, Arizona, and southward in Sonora. 



5. Scheirii, MUhlpf. Stems ovate-globose, 3-6 in. in 

 diam., usually simple: tubercles large and distant, 

 deeply grooved, with 1-5 glands in the groove: spines 

 stout, rigid, sometimes reddish; radials 6-16; centrals 

 1-5, stouter and longer, 1 very stout and porrect : fls. 

 2 in. long: .seeds large for the genus, S, W. Texas and 

 southward in Mexico. 



6. robustispina, Engelm. (K. Brdirnii, Touraeyl. 

 preceding, but tubercles teretish, no 



gla 



th< 



ry stout 

 straight, curved oi 

 straight upper one 

 tube: seeds large. 

 Tucson, Ariz. 



• sometimes a single one at apex: 



radials 10-15 ; central 1. longer, 



even hooked, rarely an additional 



: fls. 2 in. long, with very slender 



Babuquibari mountains south of 



