33 
IV. OPUNTIA, Tourn. 
Ovarium sepalis subulatis caducis axilla pulvilligeris instructum. 
Semina magna, compressa, discoidea, seepe marginata, albida. Coty- 
ledones foliaceze, circa albumen curvate, plerumque incumbentes. — 
Plante articulate ; articulis complanatis seu teretibus plus minus tu- 
berculatis ; foliis subulatis caducis axilla pulvillos setosos plerumque 
aculeiferos gerentibus ; aculeis apice retrorsum hispidis. 
: ANALYSIS, 
I. Petala parva, subulata, suberecta. Subgen. 1. Srenopuntia. 
II. Petala lata, obovata seu obcordata. 
i Artieuli complanati : — cirea, albumen a 
cum spiraliter convolutus ubgen,. 2. PLATOPUNTIA. 
A. Bacca succosa: margo seminum a 
rumque angustior (Sarcocarpec). 
a. Glabrz. 
* Bacca parva re § 1. Microcarpee. 
* * Articnli magni i 
pauci compressi. § 2. Grandes. 
* * * Articuli minores: acu- 
lei setiformes. § 3. Setispine. 
aculei pauci, robusti, te- 
tes. § 4. Vulgares. 
. Pubescentes., § 5. Pubescentes. 
B. Bacca sicea: margo seminum plerum- 
ue latissimus. § 6. Xerocarpee. 
2. os i linda embryo circa albumen co- 
subcircularis. ubgen. 3. CYLINDROPUNTIA. 
iculi abbreviati, clavati. * ce. 
B. Artieuli cylindracei, elongati. § 2. Cylindrice. 
Subgen. 1. Srenopuntia, E. in B. C. R. Articuli complanati: 
flores parvi: petala subulata: stigmata pauca. 
1, O. steNopETaLa, E. |. c.: prostrata ; articulis magnis ; aculeis 
1-3 cum minoribus 1-8 ancipitibus deflexis atrofuscis ; ovario pul- 
villis confertis stipato; sepalis petalisque subulatis suberectis ; stylo 
inflato ; stigmate simplici. 
On the battle-field of Buena Vista, south of Saltillo. Nearly al- 
lied to the Mexican O. grandis, Hort. Angl., which has very simi- 
lar flowers, but is an erect asi gs with few pps white spines, and 2 or 
3 acute stigmata. 9 Th Jame 
