(89) 
superne arctioribus, profunde transversim insculptis, si- 
nubus subundulatis, acutis, profundis; areolis tubercu- 
latis, immersiusculis , tomento griseo instructis, tandem 
nudis; aculeis septem aequalibus validissimis , rectis, pa- 
tentibus, compressiusculis, annulatis, ad basim carneo- 
roseis, medio corneis, apice purpureis, infimo inter duos 
sequentes interjecto. 
Sepala spinosa , pungentia ; petala? semina gyroso-exas- 
perata , umbilico excavato ; embryo crassus, radicula pro- 
minens, acula. 
4. Echinocactus insculptus. 
E. oblongato-ovatus glaucus, minutissime albo punc- 
tatus (1); costis octo sinuatis circa areolas tuberculatis, 
transversim insculptis; areolis junioribus lanuginosis, se- 
rius nudis; aculeis septem divergentibus, recurvatis , rigi- 
dis , nascentibus purpureis tandem corneis. 
Flores citrini. 
Buenos-Ayres. 
5. Echinocactus hexaëdrus. 
E. globosus aut oblongo-ovatus, glaucus sub lente den- 
sissime punctatus, vertice umbilicato nudo; costis octode- 
cim verticalibus , tuberculatis ; tuberculis oblongo-rotun- 
datis ad basim hexaedris, infra areolas gibbosis, apice 
depressis ; areolis oblongis, lanatis; aculeis 13 albidis, 
(1) An hic caracter momenti maximi? In dubium voco. 
