1843.] Linnean Society. 177 



which he believes to be along with Smilacea and the other orders of 

 the group to which Prof. Lindley gave first the name of Retosce and 

 subsequently that of Dictyogens. He proposes to form a distinct 

 order for their reception under the name of 



Triurace^e. 



Herhm parvulae, perennes, rhizomate repente ? Folia solitaria, a scapo 

 distantia, longe petiolata, nervosa, integei-rima. FagintB ad basin pe- 

 tiolorum membranaceEe. Scapus subramosiis, basi squamosus. Flores 

 regulares, dioici ; pedicelHs unifloris, bracteatis. Perigonium corollinuni, 

 3- vel 6-partitum, patens, persistens ; laciniis longis, acuminatis, aesti- 

 vatione basi valvatis ; acumine interdum tubuloso, ante anthesin gy- 

 rato incluso. Stamina 3 vel 6? Antherce extrorsae, loculis disjunctis, 

 imo androphoro magno carnosn centrali insertae. Ovaria plurima, in 

 tori apice sessilia, adpressa, libera. Ot'z^/a in loculis solitaria ? Sfyli 

 sublaterales, subulati, vel ad apicem incrassati et oblique truncati. 

 Fruclus ignotus. 



A figure of Peltophyllum luteum, with details, from the pencil of 

 Mr. Miers, accompanied the paper. 



June 20. 

 E. Forster, Esq., V.P., in the Chair. 



Read " Notes on the Forest-trees of Australia." By George 

 Suttor, Esq., F.L.S. &c. 



Mr. Suttor states that the far greater number of these trees be- 

 long to the order Myrtacea, and chiefly to the genus Eucalyptus. The 

 species are very numerous, and many of them are still undescribed. 

 They are generically known to the colonists as Gum-trees, and their 

 distinctive names are chiefly derived from the colour of their barks ; 

 as for example, blue, black-butted, red, white, yellow, green, and 

 spotted Gum-trees. There is also a Flooded Gum-tree, a Manna 

 Gum-tree, and a so-called Mountain-ash, all belonging to the genus 

 Eucalyptus. Many of the species are of gigantic growth, and the 

 Black-butted Gum-tree in particular (Eucalyptus globulus, Labill. ?) 

 attains a size equal perhaps to that of any tree in the world. It 

 derives its name from the blackness of its butt, caused, it is said, by 

 exposure to the fires which are so frequently kindled by the natives 

 in order to burn the grass and secure the game. 



No. XIX. — Proceedings of the Linnean Society. 



