eo 
% 
as 
. 49 
Saltillo, Mexico. — Spreading masses with joints an inch long or 
less ; tubercles 4—6 lines long ; interior spines 4—6, exterior ones 
13-3 lines long. Apparently near the South American O. pusilla, 
Salm., and perhaps belonging to the Opuntia glomerate, rather than 
here. Fruit unknown. 
§ 2. Cylindrice : adscendentes vel erecte: articuli longiores, ovato- 
cylindrici seu elongati: textura lignosa compacta, tubum reticula- 
tum vel truncum compactum formans: flores magni seu parvi, pur- 
purei vel raro flavi: bacca sicca vel subcarnosa, floris rudimenta 
plerumque dejiciens, aculeata seu inermis. 
* Polyacanthe : lignum plerumque reticulato-tubulosum;_articuli 
crassiores distincte tuberculati: aculei plures seu plurimi: flores 
plerumque rubri: semina immarginata. 
ft Humiliores : diffuse ramosz : articuli subclavati: flores plerumque 
flavidi: bacce siccee, aculeate. 
35. O. Davisu, E. & B. in P. R. Rep.: caule dense lignoso ramo- 
sissimo divaricato ; articulis junioribus erectis elongatis basi attenuatis ; 
tuberculis oblongo-linearibus ; aculeis interioribus 4~7 subtriangu- 
laribus rufis vagina straminea laxa indusiatis divergentibus ; aculeis 
inferioribus 5-6 gracilibus ; bacca ovata pulvillis sub-25 aculeigeris 
stipata. 
On the Llano Estacado, near the Upper Canadian River ; common. 
— Spreading and somewhat procumbent, about 18 inches high ; the 
only one in this section with dense wood. Joints 4—6 inches long, 
rather slender; tubercles 7 —8 lines long; interior spines 1 —- 14 inch- 
es in length; lower ones 3—6 lines long. Fruits (all sterile, and per- 
haps not properly developed) an inch or more in length. 
_ 86. O. ecninocarPa, E. & B, |. c.: erectiuscula; ramis numero- 
sis patentissimis ; articulis ovatis basi clavatis ; tuberculis ovatis con- 
fertis; aculeis majoribus sub-4 albidis stramineo-vaginatis, 8-16 mi- 
noribus undique radiantibus ; flore flavo (?); bacca globosa depressa 
seu hemispheerica late profundeque umbilicata pulvillis sub-40 aculea- 
tissimis stipata ; seminibus late commissuratis. 
Var. 8. Mayor:, elatior; articulis elongatis; aculeis longioribus 
laxius vaginatis paucioribus; baccis globosis pulvillos pauciores (25) 
gerentibus. i 
In the valley of the Lower Colorado; 8. in Sonora. — Var. a. is a 
