15 
2-V 
II. ECHINOCACTUS, Link. & Otto. 
Ovarium emersum baccaque sepalis stipata. Semina ssepe albumi- 
nosa. Cotyledones plus minus foliacess plerumque hamatse. — Plan- 
tee subglobosse, costatse; inflorescentia verticali. 
§ 1. Hamati, Salm. 
1. E. Scheerii, Salm : globosus s. ovatus ; costis 13 obtusis inter¬ 
rupts ; tuberculis supra ad medium sulcatis; aculeis radialibus IS¬ 
IS setaceis, centralibus 3-4 angulatis variegatis, superioribus rectis 
longioribus sursum divaricatis, inferiore robustiore breviore hamato; 
floribus minoribus flavo-virescentibus; bacea virescente ; seminibus 
fuscis. 
About Eagle Pass, on the Rio Grande : fl. August to October. — A 
most elegant little species, 1J-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 1-2J lines in length 
with the spines, resembling the groove of the Coryphanthce , especial¬ 
ly of Mamillaria macromeris. Green flower an inch long, much 
less in diameter. 
2. E. brevi-hamatus, E. in B. C. R.: obovato-globosus; costis 13 
compressis obtusis interrupts ; .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 
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. Whipplei, E. & B. in Pacific R. R. Rep. : ovato-globosus ; 
costis 13 -15 interrupts ; 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 
