566 NEW SPECIES OF PENTAGONIA. 
Notice of a new species of PENTAGONIA (Ord. Rubiaceæ), Benth., 
from Panama, discovered by Mr. Seemann; by W. J. H. 
(Tas. XVIIL) 
In Mr. Bentham’s “Botany of the Voyage of H.M.S. 
Sulphur,” he has figured and described, p. 105, tab. 39, a very 
remarkable new genus from Panama, under the name of Penta- 
gonia, of the tribe of Rondeletiez, Fam. Rubiacee. One species 
only was known to Mr. Bentham, P. macrophylla. Among a col- 
lection lately made in the southern extremity of the isthmus of 
Panama, by Mr. Seemann, is another plant, which, differing as it 
does in some remarkable particulars from P. macrophylla, never- 
less did at once so strike its discoverer as of that genus, that he 
sent it home with the appropriate name of Pentagonia pinna- 
tifida attached to it. A tolerably careful analysis of the speci- 
mens, of which it is to be regretted the flowers are not in a 
very perfect state, confirms the view taken of it by Mr. Seemann, 
and I gladly adopt his name. 
PENTAGONIA PINNATIFIDA. Seem. mst. 
Hexamera, foliis maximis pinnatifidis longe petiolatis, petiolis 
basi utrinque auriculatis, calycibus tubplosis apice 6-dentatis intus 
pilosis basi squamis 6-ovatis pubescentibus instructis, corolla 
tubulosa calycem vix superante apice 6-dentato. (Tas. XVIIL) 
Has. Cupica, at the southern extremity, and on the Pacific 
side, of the isthmus of Panama. W. Seemann. 
Characters common to this and to P. macrophylla, and which 
may be esteemed of generic importance, are the general aspect of 
the two, the great size of the foliage, the very peculiar reticulation, 
best seen on the under side of the leaf, as exhibited atf. 6 of our 
plate; the size and shape of the stipules ; inflorescence with its 
copious bracteas; the general structure of ovary, style and stigma, 
with the cup-shaped epigynous disk ; the sou of the stamens 
and hairyness of the filaments. 
Our plant differs from Mr. Bentham’s, remarkably, in the pin- 
natifid leaves, in the two great auricles, one on each side the base of 
