62 
PROCEEDINGS OF THE 
peared in the columns of the Literary Gazette, and that 
emanating from so scientific a Society as the one you are 
connected with, might give the opinion of “ Hybridity in 
Ferns” a weight I am persuaded it does not deserve. 
Mr. Riley forwarded to the Society specimens of Gymno- 
gramma calomelanos, G. chrysophylla, and G. sulphurea, for 
comparison. 
Mr. Cooper exhibited and explained M. Dutrochet’s En- 
dosmometer. 
APRIL 6th. 
J. E. Gray, Esq., F.R.S., President, in the Chair. 
Previous to the meeting Mr. D. Cooper delivered the third 
and concluding lecture on Botany. 
The following Paper was read (i On the Ant Tree of 
Guiana,” (Triplaris Americana). By Robert Sciiomburgk, 
Esq. 
Triplaris, Linn. 
Class IX. Ord. II. Ord. Nat. Polygoneal, Juss. 
Flores dioici. Calyx basi tubulosus, pilosus. Flores Masc. Ca- 
lyx limbo 6-partitus. Corolla 0. Stamina 9. Flores Fem. 
Calyx 3-partitus. Corolla 3-petala. Ovarium 3-quetrum. 
Styli tres. Akenium 3-quetrum, calyce aucto tectum. 
T. Americana, foliis alternis, integerrimis, oblongis, acutis, nervo- 
sis ; stipulis lanceolatis laceris, spicis terminalibus axillaribusque 
brachiatis. 
Triplaris Americana, Linn. Sp. PI. p. 130. Aubl. Guian. ii. p. 
915. t. 347. — T. Pyramidalis, Jacq. Amer. 13. t. 173. f. 5. 
A tree from fifty to sixty feet in height ; its trunk smooth, 
of a greyish colour ; the branches erect, frequently in the 
form of a pyramid ; leaves entire, oblong and narrow, from 
nine to twelve inches long, of a dark green colour ; petiole di- 
lated at the base, somewhat amplexicaule, with ochreate sti- 
pulce, and marks at the opposite direction, as of fallen-off pe- 
