MAMILLARJA 



CACTEAE. 681 



42. M, GUMMIFERA Engelm. ia Wislic. Repert. not. 33. Sc Boston Journ. of nat. hist. VI. 

 199. t — Floribus rubellis; ovario glabro ; sepalis sub-13 oLlongo - linearibus obtu- 

 siusculis fimbriatis; petalis 16 lanceolatis breviter acuminalis denticulaio -erosis; stig- 

 maiibus 6, stamina brevia rubella longe excedentibus, petala subaequantibus virescenti- 

 bus. — Crescit in Mexico boreali. 



43. M. RUSGHL\NA Rgl. Ind. sem. hort. Turic. 1850. colL pag. 4. adnot. [Aulacolhelae 

 eglandulosae]. — Gaule erecto ellipsoideo; axillis nudis; mammillis magnis (8'" lon- 

 gis, 5 — 6'" latis) ereclis ovatis vel compresso-ovatis, supra sulcatis; areolis ovatis; 

 aculeis exterioribus patenti-recurvis, radiantibus 13 — 17 albidis (5 — 8"' longis), cen- 

 tralibus crassioribus et longioribus 1 — 2 vel nullis. — Ilabitat in Mexico. 



t loon addenda. 



M. GLAVA Pffr. — Wlprs. Repert. II. 295. no. 117. - Hook. Bot. Mag. t. 4358. 



IV. MEI.OCACTUS DC. 



(Wlprs. Repert. H. 30i. — Salm-Dyck, Gact. in hort. Dyck. ao. 1849. cult. p. 138.) 



Tribus 11. ECHINOCACTEAE Salm-Dyck 1. c. 



Gcrmen exsertum squamosum, raro laeve; flores e luberculis pul- 

 villigeris plerumque in costas confluentLbus , in vertice caulis; tubo 

 perigonii plerumque brevi. 



V. BISCOCACTUS Pfeiff. 



(Wlprs. Repert. II. 323. V. 817. Ghar. gen. exci. si^c. — Wlprs. Annal. I. 335. — Salm- 

 Dyck. Gact. in hort. Dyck. ao. 1849. cult. p. 140.) 



VI. MAIiACOCAKPUS Salm-Dyck. 



(Salm-Dyck, Cact. in hort. Dyck. ao. 1849. cuit. p. 141.) 



VII. ECHiairOCACTUS Lnk. ^ Otto. 



(Wlprs. Repert. II. 309. & 936. V. 813, Annal. I. 332. & 974. — Salm-Dyck, Cact. in hort. 

 Dyck. ao. 1849 cult. 142.) 



1. E. LINKEAKUS Alb. Dietr. Allg. Grtnzng. XVI. 298. f — Obovatus: costis foliaccis de- 

 cipientibus apice uniareolatis ; areola verruciformi elliptica concava villigera; aculeis 

 .sex albidis, lateralibus quinque planiusculis inaequalibus subcurvatis, centrali solitario 

 plano varie curvato. — Grescit in Mexico. 



2. E. PULVERULENTUS Muhlnpfrdt. in Allg. Grtnztng. XVI. 9. f— Virescens, ovatus sive 

 oblongo-ovatus, 13-costatus: costis obtusis; areolis 4" distantibus cinereo - lanatis; 

 aculeis radiantibus 6 — 7 rigidis 4—5'" longis, centrali uno. VU" long. — Grescit 

 in Bolivia. 



3. E. OCTAGANTHUS Muhlnpfrdt. I. c. 10. f — Obovatus. 40 — 44-costatus: coslis com- 

 pressis interruptis; areolis immersis albo-pilosis tumidis; aculeis radiantibus 7, cen- 

 irali uno. — Crescit in Mexico.' 



II. 86 



