SCHOMBURGK’S GUIANA PLANTS. 95 
Petalum supremum calyce duplo longius, ungue lata, lamina 
orbiculata undulata, 4 inferiora vix lineam longa linearia.— 
Legumen orbiculatum obliquum plano-compressum, glabrum, : 
leve.— On the Essequibo and Rupunoony. Schomburgk, 
n. 521.—Santarem in Brazil. (Herb. Mus. Imp. Petropol.) 
230. O. multijuga, DC. Prodr. II. p. 510.—Foliola 4—7- 
juga. Stamina 3, basi pilosa. Petalum unicum vidi, inferi- 
oribus omnina deficientibus.—Rio Branco. Schomburgk, 
n. 777.—French Guiana. Martin. 
231. Vouapa staminea, DC. Prod. ll. p. 511.— British 
Guiana. Schomburgk, n. 511. 
Allied to this is 7. penile or Macrolobium pisüiidui; 
(Vogel, Linnea, XI. p. 412), which is among Perrottet's plants 
from French Guiana, and which I have also received from 
the Petersburgh Academy, gathered on the Rio Negro; it 
has, however, smaller narrower.leaves, with longer points, 
and the ovary and fruit are smooth. 
232. V. bifolia, Aubl. Pl. Guian. I. p. 25. t. 1 ?—On the 
Essequibo. Schomburgk, n. 10.—I have several specimens 
before me which may not all belong to the same species, but 
which I am not at present able to characterize as distinct ; 
viz.: 1. Martin's specimens from French Guiana, which 
most resemble Aublet’s figure; 2. Schomburgk's, which have 
leaves rather blunter and thicker and the spikes longer; 3. 
a Parà specimen in the Paris herbarium, with much longer 
points to the leaves and short spikes. They have all a pubes- 
cent ovary and the bractez are somewhat coriaceous, though 
less so than in Salzmann's Bahia specimens, which appear 
to be the Macrolobium hymencoides, described by Vogel (Lin- 
nea, XI. P. 413). 
The genera Outea and Vouapa have been often united 
eee into one, under the name of Macrolobium, and as often sepa- 
. Tated upon various grounds. It appears to me that they are 
. really distinct, although not in the flower; the pod of Ouea — 
being obliquely orbicular with the margin equally thick all- oe 
round, and that of Fowapa oblong, somewhat falcate, with | f 
the upper margin very much thickened. The sibiqe Re Es 
