Tas. 6867. 
ECHINOCACTUS Joapir. 
Native of Uruguay ? 
Nat. Ord. CacteEm.—Tribe EcHINocACTER. 
Genus Ecainocactus, Link and Otto; (Benth. et Hook.f. Gen. Pl. vol. i. 
p. 348.) 
Ecurnocactus Joadii; parvulus, depresso-globosus, vertice alte depressus, lete 
viridis, costis ad 20 § poll. latis crenato-areolatis areolis (crenisve) subdepresso 
mammilleformibus apice rotundatis levibus, spinis intercrenalibus 15-25 
exterioribus inzquilongis gracillimis erecto-patentibus albis, 1-4 centralibus 
fere duplo longioribus et fortioribus rubris porrectis, perianthio infaundibulari 
2-3 poll. lato, tubo 1§ poll. longo squamis perplurimis arcte imbricatis dense 
obtecto, squamis oblongis § poll. longis apice pilis longis tortis crinitis, apice 
squamula lanceolata setisque 8-10 erecto-patentibus rubris instructis, sepalis 
petalisque perplurimis pluriseratis lineari-lanceolatis acuminatis pallide aureis, 
antheris minutis, stigmatibus 10-12 erectis coccineis. 
This beautiful species was in the rich collection bequeathed 
to the Royal Gardens by the late Mr. Joad, of Wimbledon, 
bearing the name of H. mammulosus, from the description 
of which, however, it widely differs. In form, size, number 
of ribs and their lobing into mammilla, it agrees with that 
Species, but the spines are far more numerous, more 
slender, none of them are flattened, and the inner ones are 
not deflexed. Mr. N. E. Brown, who has paid a good deal 
of attention to these plants, and has helped me in the 
determination of this, regards the species with recurved 
flattened inner spines as forming a very distinct group 
from those which, like H. Joadii, have perfectly terete 
slender straight ones. The difficulty of naming these 
Cacti from descriptions is so great, that it is with great 
hesitation that I put this forward as a new species; but — 
no other course presents itself. H. concinnus, figured at 
_p. 551 of the second edition of “ Forster’s Cacteen,” and. 
‘which is always placed next to H. mammulosus, strongly 
_ resembles this in form, habit, and in the disposition of the 
spines, but it has fewer broader ribs, only twelve to fourteen 
spines in a group, and has lanceolate scales in the perianth- 
_ MARCH Ist, 1886. 
‘ 
