622. FLORA OF SOUTH AMERICA. 
I. bauhiniefolie, Pospp. et Endl. Nov. Gen. et Sp. 3, 
p. 80, is my Calliandra amazonica. I. leta, Poepp. et Endl. 
l. c., is my Pithecolobium letum, to which I have also referred 
the specimens in fruit described by Posppig under the name 
of Pithecolobium polycarpum. " 
(To be continued.) " 
Contributions towards a FrLoRA or Sourn AMERICA — 
Enumeration of Plants collected by Sir Ropert SCHO! ; 
BURGK, in British Guiana.—By GEoRGE BENTHAM, Eso. 
(Continued from Vol. II. p. 674.) 
PoLYGoNACE&. 
The genera of this order have been well arranged by ©. 
A. Meyer in a paper published in the Transactions of the 
Academy of Sciences of St. Petersburgh, and several portions 
of the order have been worked up with considerable ability - 
by Meissner, yet there remains much to be done by the 
 monographist who shall undertake the task for the ! 
 dromus, and who it is generally understood is to be U^ - 
Meissner himself. The further division of the extensive 
genus Polygonum will probably not be carried beyond t 
separation of Meissner's very natural genus Muhlenbeckia 
and possibly that of some anomalous looking species; : 
as P. virginicum,t but Coccoloba, if studied from better 
mens than those we usually possess, might furnish E 
very good sectional, if not generic groups. Among 
numerous species now preserved in our herbaria, b 
* The P. flexuosum, Benth. Pl. Hartw. p. 80, must follow its near 2 
P. tamnifolium, Humb. et Kunth, into Muhlenbeckia. The ns 
style in the American species are not so distinctly penicillate 88 ` 
Australian M. australis, but this does not invalidate the general 
of the genus, POR Sea: JOE 
T Whilst correcting this sheet for press, I have received Dr. 
Plante Zindheimeriane, in which one of these species, P. fi l 
established as a-genus under the name of Thysanella. 
