15 
Il. ECHINOCACTUS, Link. & Otto. 
Ovarium emersum baccaque sepalis stipata. “Semina spe albumi- 
nosa. Cotyledones plus minus foliaceze plerumque hamate. — Plan- 
tee subglobosz, costate ; inflorescentia verticali. 
1. Hamati, Salm. 
1. E. Scneeru, Salm: globosus s. ovatus ; costis 13 obtusis inter- 
ruptis; tuberculis supra ad medium sulcatis ; aculeis radialibus 15 -— 
18 setaceis, centralibus 3-4 angulatis variegatis, superioribus rectis 
longioribus sursum divaricatis, inferiore robustiore breviore hamato ; 
_ floribus minoribus flavo-virescentibus ; bacca virescente ; seminibus 
uscis. 
About Eagle Pass, on the Rio Grande: fl. August to October. — A 
most elegant little species, 1}-2 inches high; larger spines black 
and white variegated; radial ones 3-6, central ones 6-12 lines 
long ; floriferous areola united by a groove of 1-2} lines in length 
with the spines, resembling the groove of the Coryphanthe, especial- 
ly of Mamillaria macromeris. Green flower an inch long, much 
less in diameter. 
2. E. previ-namatus, E. in B.C. R.: obovato-globosus ; costis 13 
compressis obtusis interruptis ; tuberculis supra usque ad basin sulca- 
tis; aculeis radialibus 12 teretibus albidis, centralibus 4 complanatis, 
lateralibus rectis sursum versis paullo longioribus, summo debiliore 
et infimo robustiore deorsum hamato brevioribus ; floribus minoribus 
roseis. 
On the San Pedro, and about Eagle Pass: fl. April. — Very similar 
to the last; but larger, 3-4 inches high, with fewer spines, the lower 
central usually hardly longer than the upper radial ones, about one 
inch long ; lower radial spines shorter, and upper central ones longer. 
The rose-colored flowers are 12-16 lines long, much less wide. 
Fruit unknown. 
3. E. Wuiprtet, E. & B. in Pacific R. R. Rep. : ovato-globosus ; 
costis 13-15 interruptis; aculeis radialibus 7 compressis albidis, 
centralibus 4 longioribus robustioribus compresso-quadrangulatis, sum- 
mo latiore longiore, infimo robustiore deorsum hamato; seminibus 
magnis nigris. 
On the Colorado-Chiquito, in Western New Mexico. — Plant 3-5 
inches high ; exterior spines 6-9 lines, upper central spine 12-18 
