MAMMILLARIA. 



CACTEAE. 293 



90. M. GLOMERATA DC. Prodr. III. p. 459. - Pfeiff. I. c. — Caespitosa: tuberculis 

 subdiscretis clavatis glaucis tomentosis, apice stellato-spinulosis. — Flores rubri. 

 — . Cad. glomeratus Lam. Dict. 1. p. 257. — Plum. ed. Burm. t. 201. f. 1. — Spreng. 

 Syst. II. p. 494. excl. Uaw. syn. — Crescit in S. Domingo. 



91. M. NUDA DC. Prodr. III. p. 460. — Pfeiff. 1. c. - Simplex cylindracea adscen- 

 dens glabra: luberculis inermibus. — Flores rosei. — Cac(. nwdws FI. Mex. ic. ined. 

 — Crescit in Mexico. 



92. *M. MITIS Mill. — Pfeiff. I. c. — Species indescripta. 



Species addendae. 



I. Aculeis centralibus iiullis. 



a. Globosae. 



93. M. SUBTETRAGONA Alb. Dietr. in Otlo et Dietr. Allg. Gartenztng. VIII. 169. f — 

 Simplex globosa: axillis lanatis; mammillis glaucescentib. conico-pyramidatis, 

 subtetragonis; areolis apicalib. lanatis; aculeis 4, omnib. marginalib. brevib. ri- 

 gidis atrofuscis v. albido-varicgatis. — Habilal in Mexico. 



94. M. BERGII Miq. Comment. phytogr. III. 104. — Simplex subglobosa glauces- 

 centi-viridis: axillis lanalis; mammillis conico-pyramidatis rhombeis; areolis ju- 

 niorib. lanalis, tandem nudis; aculeis 4 decussatis, arcuatim-palenlib., supremo 

 maximo, carneis opacis; sligmatc trilobo. — M. Seil:^iana Miq. Linnaea XII. 10. 

 nec Mart. — In Mcxico. 



95. M. SULCO-LANATA Lem. Cact. aliq. nov. 2. f - Subglobosa subdepressa, la- 

 teraliter prolifera intense nilideq. virens: axillis praecipue per juventutem lanatis; 

 mammillis gibbosis latis, ad basin obsolete penlaedris, ad apicem subconicis de- 

 pressis, supra sulco nolalis, lana alba in areolis juniorib. floccosa sicut et in sul- 

 cis mammillarum non parca, areolis deinde nudis; aculeis 9-10 inacqualib. irre- 

 gulariter radiantib., supero infimoq. parvis, lateralib. validiorib. longiorib. sub- 

 fuscis, ad apicem nigricanlib., juniorib. albo-Iuleis, apice purpureis, 6-8"' lon- 

 gis; floribus ? — M. retusa Scheidw. mss. — Crescit ? 



96. M. MICROCERAS Lem. Cact. aliq. nov. 6. — Subglobosa valde depressa alro- 

 virens: axillis lanatis, lana alba siibHoccosa munitis; areolis minimis rotundis, 

 recentissimis lomenlosis, fere slalim nudis; mammillis pressione mutua subte- 

 Iraedris, dorso vix angulato 4-5'" altis, irregulariler latiuscule et abundanter ar- 

 genleo albove maculalis (an casu morboso?), ad mcdiam plantam adpressis, com— 

 presso-deplanatis, ad imam obsolete deciduis; aculeis 4-5, rarissime 6, tribus 

 ereclis superiorib. 2-3 lin. longis, inferiorib. duobus 5-6'" menlientib. robustio- 

 rib. dislichis, cornua parva simulantibus, omnib. irregulariler recurvulis rigidis, 

 colore corneo, apice nigris, ad basin vix subulatis fereq. canaliculalis. — M. lon- 

 gimammae affinis. — Crescit in Mexico. 



97. M. WEBBIANA Lem. Cact. nov. gen. et spec. 45. f — Sphaeroidea impressa in- 

 lense virens: axillis lanatis; areolis rotundis lanatis ; mammillis obtusis sursum 

 convexis, sublus Iriangularib., ad basin subletragonis; aculeis confertis, quatuor 

 in numero consuelo, fere decussatis, saepe quidem praeterea duobus minimis in- 

 fimis ulplurimum abortientib., tribus erectis superis, quarto validiori longiori, 

 subhorizontaliler porrecto, omnibus subangulosis. — Crescit in Mexico. 



98. M. RETUSA H. Belg. — Pfeiff. in Otto et Dietr. Allgem. Gartenztng. V. 369. t — 

 Subglobosa, emammillis infimis prolifera perviridis: axillis tomenlo denso albido 

 instructis; mammillis latis mammacformib., dorso sulcalis; areolis albo-lomen- 

 tosis; aculeis 8-10 rigidis rectiusculis palentissimis fuscis, 3 supremis graciliorib., 

 centrali nullo. — Habitat in Mexico. — (cf. no. 95.) 



99. M. EHRENBERGII Pfeiff. in; Otto et Dietr. I. c. VI. 274. — Globosa simplex: 

 axillis lana alba floccosa copiosa instructis; mammillis oblique conicis crassis, 

 facie inferiore obsolete angulosis , obscure viridib. albo-punclatis; areolis infra- 

 apicalib., lanae albae denso fasciculo, mox evanescente, iustructis; aculeis ple- 

 rumque 2, rigidis applanatis, breviore sursum, longiore deorsum spectanle, ra- 

 rius lerlio lateraliter divergente subulato, supremum aequante, omnib. nascenlib. 

 pallide fuscis, mox eburneis, apice nigris. — Habitat in 3Iexico. 



