connected with the Flora of Guiana. 237 



habit of the plant, notwithstanding its occasionally alternate leaves, and the 

 structure of the stamens and ovarium, show a close affinity to Rhizoholece. 

 It may, in short, be described, as far as can be ascertained without a know- 

 ledge of the fruit, as a polygynous Caryocar with cohering petals and leaves 

 often alternate. 



It is true that Meyer does not mention the coherence of the petals ; but as 

 he speaks of their concavity and the caducity of the corolla, it is probable he 

 had not seen it open, and may possibly have merely separated the petals by 

 force to ascertain their form. 



As a second genus of an order consisting hitherto but of five species, I sub- 

 join a figure of the plant and the generic character, referring to Meyer's work 

 for a detailed description of the species. 



Anthodiscus. 



Calyx breviter cupuleeformis, margine obscure 5-lobo, persistens. Petala 5, 

 concava, arete cohserentia, disco hypogyno inserta, per anthesin calyptrse 

 more decidua. Stamina numerosissima, cum petalis disco hypogyno 

 inserta, basi brevissime monadelpha, interiora breviora, omnia fertilia. 

 Filamenta filiformia, tortuosa, minute glandulosa. Antherce ovatee, bilo- 

 culares, loculis rima longitudinali dehiscentibus. Ovarium liberum, de- 

 presso-globosum, radiatim multi- (circiter 14-) loculare, loculis uniovu- 

 latis, ovulis peltatis, latere interiore affixis. Styli tot quot loculee ovarii, 

 oblongi, incurvi, stigmatibus oblongis, terminalibus. 



Arbor Guianensis. Folia alterna, vel opposita, in caule articulata, trifoliolata, 

 foliolis coriaceis lucidis. Pedicelli breves, uniflori, bibracteati. 



Species unica A. trifoliatus. G. W. F. Meyer, 1. c. p. 194. 



Tab. XX. 



Hab. in Guiana Anglica ad ripas flurainum Essequebo et Rupununy. 

 Schomburgk /- PI. exs. n. 512. 



VOL. XVIII. 2 I 



