MAMJIILLARIA 



BB. Spines one ormore hooked (nid 



central, exeept in M. pusiUa 



and M.dioica insiihiris. 



C. Bristles one or mon foitml 



in the axils belir.e,, Ihf 



tubercles 40. pusilla 



41. Bocasana 



42. Wildii 



43. tetrancista 



44. dioica 



45. armillata 

 cc. Bristles none in the axils, 



except perhaps in M. Car- 

 ret ii 40. Wrightii 



47. Goodrichii 



48. Grahami 



49. venusta 



50. Mainae 



51. Carretii 

 ».. Juice milky noil, in thr tnhnxhs. 



but found or ^' '.. -kn/, ,./,,/ hi 

 the body. X" li""l,''i >/""•<. 

 Radial spimx I, ss llnin I'l; 

 centrnls usiialh/ 1. 



B. Fls. yelloiv 52. eriacantha 



BE. Fls. hlood-red .'iH. sphacelata 



BBB. Fls. carmine 54. spinosissima 



.55. rhodantha 

 5(1, dolichocentra 



57. discolor 



58. Lesaunieri 

 5!>. Haageana 

 CO elegans 



A. Jill e milky exuding fioni 

 H 1 ?i in any patt of th 



MAMMILLARIA 



973 



u t L n and loi 



eiing the plant stems at 

 length cylindrical ot clai 

 ate axils uoolly 61 bicolor 



62 Farkinsonii 

 63. Jormosa 

 cc. Spines few, stouter, often 

 angular, some of the cen- 

 trals very long and more 

 or less flexHous : tuber- 

 cles rather large, angled: 



axils woolly 64. angularis 



65. centricirrha 

 M. mutabilis 

 07. Heeseana 

 BB. Fls. whitish, yellowish or 

 flesh-color. 



slender, scarcely angled J'i>^. simplex 



Oil. Brandegei 

 711. Heyderi 

 cc. Badial spines rarely as 



many as 9: body mostly 



depressed '. 71 . meiacantha 



72. camea 



73. uncinata 



74. Trohartii 



75. sempervivi 



76. Caput-Medus 



77. micromeris 



IXDEX. 



acanthophlegma, 60. atilacothele. 2. Srovmii. 6. 



Alversoni. 20. aureiceps. 55. calcarata. 1-1. 



ancistracantha, 1. autumnalis, 66. ciiulida. 39. 



angularis, 64. liarbata, 37. Capiit-Jleilusif , 

 appl.anata. "' 



Lehi 



rhodantha, ,i5. 

 robustior. 16. 



RuiioeC'ii. ' 



deeipiens, 32. Leona. 31. sangiiinea. 51. 



deflexispina, 65. Lesaunieri. 58. Scheerii, 5. 



densa, 30. longiraamma, 25. Schmidtii, 65. 



denudata, 34. maeromeris, 17. scolymoides, 10. 



deserti, 20. niaerothele, 2. sempervivi, 75. 



dioica, 44. MaiiiiB, 50. senilis, 36. 



discolor. 57. meiacantlia. 71. setispina, 27. 



dolielioceutra, 56. micromeris, 77. similis, 16. 





uple 



Trohartii 

 tuberculosa. 22. 

 uberiformis. 25. 



bicolor. 61, 



Bocasana. 41. Carretii, 51. 



jonica, 20. borealis, 20. centricirrlia. 65. 



lillata. 45. Brandeeei, 69. chlorantha. 20. 



Jlissouriensis, 16. sphacelata. 53. 



Echinus, 9. multiceps, 40. sph»rica, 25. 



elegans, 60. mutabilis, 06. splia:rotriclia . 39. 



elephantidens, 24. Neo-Mexicana, 20. spinosissima, .'54. 



elongata, 30. Nickelsje, 15. stella-aurata. 30. 



ereeta. 3. nivea. 61. stellaris. 40. 



eriacantha, 52. Nogalensis, 4. sfellatus, 40. 



fissurata: See An- NuUallii. 16. strobilifonnis. IS.'. 



halonium. Odieriaiia. 55. siibangnlaris. 64. 



formosa, 63. PaUiieri.U. sulcata, 14. 



Forsteri. 65. Farkinsonii. 02. tenuis. 30. 



fragilis, 33. pectiuata. 12. telracantha. ,W, 6; 



fulvispina, 55. Petersonii, 67. tetraucistra, 43. 



fascata, 55. Pfeifferi. 55. Texana, 40. 



Oabbii. 69. phellosperm 



Galeottii, 50, 56. plumosa, 35 



globosa, 25. Pondii, 28. 



Goodrichii, 44, 47. Pntosina, 60. uncinata, i6. 



Grahami, 48. prismatica: See An- venusta. 49. 



Greggii, 77. halonium. vetula. 38. 



Guilleminiana, 32. pusilla. 40. vivipara, 19. 



Haageana, 59. pyr,imidalis, 55. Wildiana. 42. 



Halei. 29. radians, 11. Wildii. 42. 



Heeseana, 67. radiosa. 20. Wissinanm. 16. 



hemispha?rica, 70. Radliaiia. 20. Wrightii, 46. 



Heyderi, 70. rapliidacautha, 1. 



1. rapMdac4ntIia, Lem. 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 

 grav: r;uli;iK i;-Hi; mitral 1 . longer and stouter, straight 

 or iiook'.l ill ihr -iiiiir phiiit : fls. about 1 in. broad. 

 San Lni~ r<.tM-i. .M.\.-'riii- more constantly hooked 



form is J/, iniri.-it mill nihil . Lem. 



2. macrothele, Mart. (M. aulacothele, Lem. M. Lfh- 

 manni. Otto). Stems stout, attaining nearly 2 ft. in 

 height 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. l]4-2 in. broad. Central Mex. 



3. ertcta, 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)4 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. reourvita, Engelm. {M. reeurvisplna, Engelm. 

 31. Nogalensis, Runge). Stems depressed-globose and 

 often deeply concave, 6-S in. in di.im., forming large 

 masses 1-3 ft. in diam : t.;!.. r -li ■ -liirt, with usually a 



large gland in the gro,.-, il^ iim \: spines yellow 



or whitish, stiff, re.ur : , interwoven and 



covering the whole |.|:i:, , : ;.i! 1 >-20 ; central 1, 

 rarely 2, recurved: fls. uIm.ki i m. l..iig, brownish out- 

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



5. Scheerii, Muhlpf. Stems ovate-globose, 3-6 in. in 

 diam., usually simple: tubercles large and distant, 

 deepiv 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. robustisplna, Engelm. {3/. Brdwnii, Toumey). 

 Much like the preceding, but tubercles teretish, no 

 glands in the groove or sometimes a single one at apex: 

 spines very stout ; radials 10-15 ; central 1, longer, 

 straight, curved or even hooked, rarely an additional 

 straight upper one: fls. 2 in. long, with very slender 

 tube; seeds large. Babuquibari mountains south of 

 Tucson, Ariz. 



