258 ON MARUPA, A NEW GENUS OF SIMARUBACER. 
Mendoza and San Luiz, 780 miles west of Buenos Ayres and 103 
miles east of Mendoza. I cannot remember the plant upon the root 
of which it grew. 
Tweedie’s specimen is smaller, and less developed; but it shows 
its long root, and confirms all that is related above. It came froma 
similar saline district, which may be considered a far extension of the 
Travesia of Mendoza. 
Description oF Prate 135a. 
Fig. 1. The flower of Hydnora americana, opening by its 3-valved perianth. 
Fig. 2. The same more expanded, showing the mass of stamens. Fig. 3. The 
same seen obliquely, showing in a cross section of the ovary the three pairs of 
ovuliferous placentw, suspended from the summit of the cell. Fig. 4. The same, 
with half of the perianth removed, to show the masses of stamens, and the sus- 
pended placente : all natural size, 
ON MARUPA, A NEW GENUS OF SIMARUBACE. 
By Jonn Mirrs, F.R.S. 
(Tas. 135s.) 
_ _Amone the products from Para, exhibited in the Paris Exposition 
in 1867, I found a small branch and fruits only, preserved in alcohol, 
named “‘ Marupd, ou Simarouba” (Cat. p. 75, No. 438), and 
‘arupd, ou 
in flower only, described in the “ Annales des Sciences Naturelles,” 
by Sen. Netto, a Brazilian botanist, and named by him Odina Fran- 
nl sy bearing the vernacular name of Péo Pombo. My analysis of 
therefore assumed. they belong to the same species. The fruit was 
not known to Sen. Netto, and it is to be regretted that his description 
and drawing of the floral structure are not sufficiently clear; his fig. §, 
section of the female flower: his fig. 9 gives a magnified view of the 
ted on the gynophorus, and surmounted by 5 
remote short styles and stigmata, the gynophorus being surrounded - 
L s 
at its base by the sterile stamens, There must be a great mistake 
gnified view of the ovary) shows n 
ovaries upon the gynophorus, only a single ovary, surmounted by 4 
a 
4 
