137 



This genus is nearest to the monotypic Piptocalyx, so far only known 

 from N.E. Australia, in the reduced number and arrangement of the perianth- 

 segments and the shape of the stigma ; but it approaches Trimenia in the 

 hermaphrodite flowers, differing from both in the terminal inflorescence, 

 larger flowers, thick stamens with very short strap-shaped filaments, and 

 bilocular ovary. In habit both species agree with Trimenia, but the leaves 

 in I. novo-guineensis differ in being small and coriaceous, alternately to 

 sub-verticillately arranged, while /. arfakensis, on the contrary, approaches 

 Piptocalyx in the large opposite leaves, pseudo-herbaceous in texture, 

 produced at the apex in a long caudate appendage. 



FIG. 10. 



Hx* 



Cx8 



Idenburgia novo-guineensis Gibbs. A. Branch ; B. Flower with tepals ; C. Inner 

 tepal ; D. Flower, tepals shed ; E. Ovary ; F. Showing pressure of stamens 

 at base of ovary; G. Transverse section of ovary; H. Stamen. 



IDENBURGTA NOVO-GUINEENSIS Gibbs, sp. nov. 



Arbor parva, glaberrima, rami erecti, teretes, cortice cinerascente, striguloso 

 obducti, innovationes rufescentes. Folia parva, alterna vel subverticillata, petiolata, 

 oblanceolata, obtusa vel subacuta, basi in petiolum attenuata, glanduloso-serrata, 

 recurvata, coriacea, supra minute punctata. Tepala 4, biseriata, albida, rotundata, 

 obtusa, margine subcrenulata. Stamina 8-9. Ovarium late ovoideum, aliquanto 

 compressum, glabrum. 



Halt. Arfak Mts., Koebre Mt., edge of shrubberies on summit, 9000'. 

 Fl. Dec. 5054. 



