The West American Scientist. 
M. ROBUSTISPINA A. Schott. 
Original Sr ee simplex s. cespitosa; tuberculis patel 2 
teretibus magnis sulcatis reolis juni austibas dense tomentosis; acoleis 
radialibus 12-15 robustis sebecoibied robustioribus sa urvatis, super- 
ioribue rectis fasciculatis paullo tenuioribus, centrali singulo valido com-_ 
presso recurvato, Omnibus subpollicaribus corneie apice atratis; floribus 
luteis ex axillis junioribus tomientosissimis; seminibus magnis obovatis 
fuscis levibus. Sonora, on grassy prairies: fi. July. bercles 
an inch long, characterized by a very slender, constricted tube, very 
with e yledons fo 
structure of the acd! of most Mekinocucti i,.’—Engelm. Proc, Am. A 
25. 1856. 
Engelm. Cact. aN B. 11. t. 74. f. 8 (seed). 
Walp. Ann. v. 
Watson, Rib. oye 404. 
- 400. 
M. robustissima Schott, ex E. roz4 (error). 
Cactus robustispinus Kuntze, Le. 261. 
Coulter, Le. iii. 
M. SALM-DyYCKIANA SCHEER. 
Original description:—“Infeleciter periit hac insignis species 
Potts, prope Chihuahua, cum ie ee collecta. Ex ice 
tamen Anais gum caulem esse s 
mentoso fere 
oribus 7-8 saat seback polled com, recurvulis, radianter p ti 
they simis, centralique uno validissimo, e fere ig eee Accedunt 
4 super, in mamillis senioribus, aculei med sesquipollicem 
graciles, recti aut contorti, agp supera potvill, i quasi e : 
Flores hucusque ignoti.”—Salm, C HD. ed. 2. 5134. 1850. 
“M. caule subgloboso ie eancescent saiton ie 
nudis, ma millis magnis crassis ee : : 
to 
wratthid sol itazio erecto vilidinsionts viatlstas rete cuca 
griseo-fulvidis aut brunneis, cum adyentitiis summis ee I- 
Salm-Dyck, A Gz. 1850. 394. 
Labouret, Monogr. 147. 1858. 
Cactu segs oe Kuntze, Ll. c. 261. 
Center Ee. ii 1%. i 
f VAR. BRUNNEA | Shia Dyck : 
oe “Aculeis exterioribus crassioribus, betasioriinis.- ‘5 cinereo- 
: aphems seu sinus Sastre. Pager on Byck, AGZ -_ 1850. 
