718 



29. Ml subpolyedra Salm. 



M. globoso-subcylindric« vel serius cylindrica, eimplex, erecta, 

 glaucesceos, lana in axillis subplumosa primum nivea demiitn sordide 

 alba, in areolis nivea demum evanescenle, mammillis conicis penta — 

 hexaedris faciebus planis , spinis radiantibus 4 basi albidis Eursum 

 alrorubentibus robustis, iniima multo longiori, central! nulla. tlort. 

 Dyck. p. 343- Pfeifer l. c. p. \7. — M. polygona Ziiccar. in litt. 



Crescit in imperio mexicano, prope Kxmifjuilpan, ibidem lecta 

 a clor, de Hartvinski. 



M. polyedra Marl., quae proxima, recedit lana in axillis sor- 

 dide flavescente et setis longis albis tortuosis mixta, spinis albis apice 

 tantum nigricantibus, floribus e stramineo roseis. 



Flores quam in praecedenle dimidio majores, lana albida absque 

 setis cincti. Bracteae s. sepala exteriora sordide e fusco rubenles 

 absque viredine , ciliatae; petala pallide rosea , extus fusco -sufFusa 

 vel linca dorsali saturatiuri notata, linearia , repente cuspidata. Sta- 

 mina numerosa, filamentis albis, antheris late elliplicis sulfureis. 

 Stylus Slamina superans, albidui superne rubens, stigmaliLus 5 — {j 

 sordide flavescentibus longis. 



30. M. cirrifera Mart. 



M. globoso-cylindrica vel cylindrica, prolifera, glaucescens, lana 

 in axillis nivea setis niveis subtortuosis mixta, mammillis obtuse co- 

 nicis vel hemisphaericis angulatis , spinis radiantibus 5 — 7 eburneis 

 apice tantum purpurascentibus adultis cinereis, tribus inßmis brevis- 

 simis, sequenlibus 2 laleralibus maximis, summis iterum brevioribus, 

 cenlrali unica elongata primum recta denique deflexa. — v. Martins 

 l c. p. 334. — Pfeiffer l. c. p. 13- n. 20- 



