Mr. Bentuam’s Account of two new Genera allied to Olacineæ. 685 
P. orbiculatum, foliis ovato-orbiculatis obtusissimis subtus ramulisque incanis, 
ovario hispido. \ 
Frutex 10—12-pedalis, divaricato-ramosus. Folia 4-pollicaria, supra nitida, 
venis utrinque 6 parallelis prominentibus. Flores fere 2 lin. longi. Fruc- 
tum unicum nondum maturum depresso-globosum vidi. 
Dry savannahs on the Padawire river. Schomburgk. 
P. acuminatum, foliis ovatis oblongisve acuminatis subtus vix pallidioribus, 
ovario glabro. 
Folia 3-4-poll. longa. Flores minores, laxiores quam in precedente. 
This is, according to Schomburgk, a tree of about 30 feet high, growing on 
the high banks of the Rio Negro; the flowers are pure white. Schomburgk, 
n. 970. 
EXPLANATION OF THE PLATES. 
Tas. XLI. 
Fig. 1. Apodytes dimidiata. 
2. Flower. 
3. Ditto, laid open, showing the position of the stamina. 
4. Pistillum. . 
5. Ovarium, cut vertically. 
6. Ditto, cut transversely. 
7 
8 
. Mature fruit. : 
. Ditto, ditto, cut vertically, showing the seed with its albumen and 
T Tas. XLII. 
Fig. 1 Pogopetalum orbiculatum. 
2. Flower unexpanded. 
3. Ditto, laid open, showing the position of the stamina. 
4. Pistillum. 
5. Vertical section of the ovarium. 
6. Transverse section of ditto. 
7. Superior ovulum. 
8. Inferior ditto. 
4u2 
