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/»seescezw ; foliis biternatis, petiolo tereti, petiolulis anguste alatis, foliolis
oblongis omnibus acutis vel obtusiusculis grosse crenato-serratis basi cu neato-attenuatis
su p ra in nervo venisque hirtis alioquin puberulis subtus m olliter tomentoso-hirtis aureo-
fuscescentibus, capsulis globoso-pyriformibus tomentosis adultis glabrescentibus, valvis
sursum c arinato-alatis.— P. fuscescens. H .B . K . Nov. Gen. 5. p . 1 2 0 ?— P . pubescens.
D e Cand. \ . p . 6 0 6 ? — H a b . 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. Dodonæa viscosa. L in n .
The specimen in the collection appears to belong to the var. » of Kunth Syn. 3. p. 1G8.
O b d . X X L A M P E L ID E Æ . 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.
O b d . X X I I . Z Y G O P H Y L L E ^ . B r .
1 . Kallstrcemia T n a a itiw a .—T rib u lu s maximus. Lin n .— H a b . Acapulco.
Ehrenbergia tribuloides of Martius is another species, and seems to differ from the more common one by
having the carpels crested at tbe back, and the colour of the flowers. Here the carpels are slightly muricated
and wrinkled. Tribulus 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 Trib. 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.
O b d . X X I IL Z A N T H O X Y L E ^ . Adr. de Juss.
1. Zanthoxylon Pterota. H . B . K . ? at forsan Schlecht. in L in n . 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. II I.
n. 68), the petiole is likewise unarmed, but the leaflets are much smaller, scarcely more than 4 or 5 lines
long, and are obovate. Tbe only prickles in both are in pairs at the base of the petioles, and are more or
less curved.
A specimen of Zanih. piperitum is aiso in the Mexican collection, but we presume that it had been accidentally
transferred from that made at Loo Choo and Bonin.
1. B ru n e llia ? quadrilocidaris; g lab ra inermis, foliis oppositis sublonge petiolatis late
ovalibus ro tundatis integerrimis, pedunculis axillaribus petiolo dimidio brevioribus,
carpellis 4 in fructum 4-locularem 4-lobatum loculicido-dehiscentem coalitis obtusis.
The internal structure of the carpels is not very dissimilar to that observed in Brunellia and Zanthoxylon.
The fruit is dotted with reddish glands ; the seed has a black shining testa. The leaves are so very obscurely
dotted as almost to bo impunctate : they are about 2^ to 3 inches long, and from 2 to broad. In some
respects it approaches Zanthoxylon Aubletia, De Cand., judging by De Candolle’s short description; but
that has the carpels quite distinct, according to M. Adrien de Jussieu.
O b d . X X IV . C O N N A IIA C EÆ . Br.
1. Ro u rea glabra. H . B . K . ?— H a b . Acapulco.
2. R. ? oblongifolia; foliolis 3-5 sub-alternis coriaceis oblongo-lanceolatis acuminatis
glabris basi obtusis vel acutiusculis, floribus axillaribus paniculatis, carpellis sub-
cylindricis.
The carpels are like those of R . santaloides, W. and A. The leaflets resemble in shape those of Omphalo-
bium Lamberti, De Cand., but are smaller, and the carpels of that species are almost obovate. We have
neither seen perfect flowers nor fruit.
O r d . X X V . C E L A S T R IN E Æ .
1. M}'gindus Scoparia; ramis virgatis elongatis quadrangulatis, foliis oppositis (parvis)
remotis lanceolatis acuminatis glabris petiolatis a rg u te serratis, pedunculis dichotomis
cymoso-umbellatis paucifloris filiformibus folio i^-4-plo longioribus.— Myginda Uragoga,
var. foliis angustioribus. Scldecht. in L in n . 5. p . 603.— H a b . Acapulco.
This appears tobe only suffruticose ; but is evidently allied to JJf. i î/2aco?na, Sw. ; it differs from Af. Uragoga,
by the glabrous leaves, besides other characters. The calyx is 4-lobed. Petals 4, witb a broad base.
Stamens 4, almost as in Euonymus. Style 1.
In the Mexican collection are specimens, probably misplaced, of what we have already described and
figured as Euonymus Japonicus.
O r d . X X V I . R H A M N EÆ .
1. Rhamnus ( Antirhamnus) b in fo r u s s Moc. et L ess, in D e Cand. Prod. 2. p . 26.—var. ?
pedunculis trifloris, foliis oblongis ovatis vel ovalibus acutis vel obtusis cum mucrone basi
acutiusculis.— H a b . Talisco.
De Candolle compares his plant with R . umbellaius, Cav. Ic. 6. t. 504, but that species has the leaves
almost sessile, while in our plant they are on rather long petioles. The segments of the calyx persist even
while the fruit is ripe, as in R . umbellatus, and are not deciduous, as in R . tcrniflorus, De Caiid., or Colubrina
trifora, Brongn. We have not seen the petals, but Cavanilles represents them cucullate in the analogous
R . umbellatus. The fruit is drupaceous : the nut is scarcely separable into nucules, but contains four
cells, of which two appear always to be abortive, as well as sometimes one of the remaining two : the embryo
is flat, as in the section Frángula of Brongniart. R . Humholdtiana is said to have the cells 2-seeded ; but
we are inclined to suppose that the dissepiment dividing the two seeds had been overlooked, and that it forms
part of the group Antirhamnus.