282 
MEXICO. 
\_ZanthoxylecB. 
botanical character hitherto given seems to be derived almost entirely from figures, these tubercles are the 
prickles mentioned by authors ; though we have no doubt but similar ones may be observed on most species 
of the genus. 
1. Paullinia fuscescens ; foliis biternatis, petiolo tereti, petiolulis anguste alatis, foliolis 
oblongis omnibus acutis vel obtusiusculis grosse crenato-serratis basi cuneato-attenuatis 
supra in nervo venisque hirtis alioquin puberulis subtus molliter tomentoso-hirtis aureo- 
fuscescentibus, capsulis globoso-pyriformibus tomentosis adultis glabrescentibus, valvis 
sursum carinato-alatis. — P. fuscescens. H.B. K. Nov. Gen. 5. p. 120? — P. pubescens. 
De Cand. \. p. 606? — Hab. Acapulco. 
Our specimens appear only to differ from Humboldt’s by the shape of their leaflets. They seem also very 
closely allied to P. velutina, De Cand. (which probably does not differ from P. mollis, H. B. K.), but that 
has the petioles not margined. ^ 
1. Dodonaea viscosa. Linn. 
The specimen in the collection appears to belong to the var. a of Kunth Syn. 3. p. 168. 
Ord. XXL AMPELIDE^. De Cand. 
1. Cissus 
The specimen is extremely mutilated : the leaves or leaflets (for they are lying loose on the sheet without 
any petiole by which we might conjecture whether they were simple or compound) are oblong-lanceolate, 
acuminated, glabrous, fleshy, and sharply toothed. 
Ord. XXII. ZYGOPHYLLE^. Br. 
1. Kallstroemia maajMwa. — Tribulus maximus. Linn. — Hab. Acapulco. 
Ehrenbergia tribuloides of Martins is another species, and seems to differ from the more common one by 
having the carpels crested at the back, and the colour of the flowers. Here the carpels are slightly muricated 
and wrinkled. Tribuhis trijugatus of Nuttall is probably the same species ; he, no doubt, attributes to it five one- 
seeded carpels, but as there is little doubt that his plant and the T7ib. maximus of Elliott are identical, we 
learn from Elliott that there are ten seeds ; and although Elliott hesitates about his being the true T. maximus, 
his description accords in every particular both with the West Indian and Mexican species. 
Ord. XXIII. ZANTHOXYLE^. Adr. de Juss. 
1. Zanthoxylon Pterota. H. B. K. ? at forsan Schlecht. in lAnn. 6. p. 426. 
In our plant the leaflets are from four to eight pairs, about 12 or 14 lines long and 4-6 broad : the petiole 
and rachis have no prickles. In a plant allied to, or a variety of this, from Texas (Drummond, Tex. III. 
n. 68), the petiole is likewise unarmed, but the leaflets are much smaller, scarcely more than 4 or 3 lines 
long, and are obovate. The only prickles in both are in pairs at the base of the petioles, and are more or 
less curved. 
A specimen of Zanth. piperitum is also in the Mexican collection, but we presume that it had been' acci- 
dentally transferred from that made at Loo Choo and Bonin. 
1. Brunellia ? quadrilocularis ; glabra inermis, foliis oppositis sublonge petiolatis late 
