MELOCACTE,K. 15 
M. — f. quadrispina Nob. —- M. quadrispina Mart. 
Pfr..1 € 
— — y. hexacantha Nob. — M. columnaris Mart, 
Pr 1 6 
-— — 4. setosa Nob. — M. selosa Pfr. Enum. p. 30. 
— — £&, aciculata Nob. — M. aciculata Otto. Pfr. Enum, 
p. 29, 
— — i. latimamma Nob. 
— affinis DC. Mem. t. 6. Pfr. Enum. p.11. — M. ca- 
taphracta. Mart. 
— Kkewensis Nob. (38) 
— -— p. albispina Nob. — M. spectabilis Hort. 
— letracentra H. Berol. ( 59.) 
$. 8. Axcurosm. Caule globoso, clavato, vel subcy- 
lindraceo , inlerdum dichotome diviso , axillis lanatis 
selosisque : mamillis manifeste angulosis, ovato - vel 
pyramidato - tetragonis , sepe in facies polyedre ap- 
planatis. 
* Tetragone. Caule globoso vel clavato, interdum dichotomo ; 
mamillis ovalo- vel pyramidato- letragonis ; aculeis 2-—4 de- 
cussalis summo et infimo longiore ; aut 5 radiantibus cum cen- 
trali 1 recurvulo vel hamato. Floribus rubicundis vel albidis. 
(Aculeis 9- 4.) 
M. Caput Medus Otto. Pfr. Enum. p. 22. and Synon. — 
DC.) M. diacantha Lem. (90) 
— — f. tetracantha Nob. 
— — y. centrispina Nob. 
— — à. crassior Nob. 
— Sempervivi DC. Rev. p. 114. Mem. t. 8. (91) 
— — B. tetracantha Nob, 
— — y. lætevirens Nob. 
— crocidata Lem. (92) 
