8 AUSTRALIAN PLANTS. 



This forms a near approach to C, BenthamianuSy Fenzl. (C. subulaius, 

 Hook, fil.), a native of Cape Horn and the Falkland Isles, though 

 not found either in New Zealand or Tasmania, but is apparently 

 identical with the pentamerous form of C. BentJiamiamis from Camp- 

 bell's Island. Since also my plant invariably shows a quinary division 

 of the flowers, I have separated it from the South American one, 

 following Dr. Hooker's suggestions* in the * Flora Antarctica,' p. 247. 



YII. Malvace^. 



New genus : Gkeevesia, Muell. — Calyx closed, at the full maturity 

 of the fruit expanding into five segments, surrounded by five shorter 

 lanceolate spreading bracteoles. Petals five, much shorter than the 

 calyx, twisted, never expanded, adnate to the tube of the stamens, and 

 concealed by the calyx. AntJiers five, ovate, kidney-shaped, one-celled 5 

 pollen-grains obliquely ovate-spherical, echinulate. Styles ten, dilated 

 into convex, at length penicillate, stigmas. Carpidia five, perfectly free, 

 net-veined, indehiscent, one-seeded, oblique-ovate, slightly keeled. Seeds 

 kidney-shaped, smooth, filling the cell. 



This highly remarkable genus, which has been dedicated to Dr. Aug. 

 Greeves, one of our warmest supporters of science, is as distinct from 

 Pavonia^ to which it ranks next, as from all other genera of this Order, 

 and is well distinguished by its extraordinary character of covering 

 with its perfectly connate sepals the little twisted corolla, which there- 

 fore does not see daylight until shrivelled up, and long after fecunda- 

 tion, when at length the calyx unfolds to set free the ripe carpels. 



20. Greevesia cleisocalyx^ F. MuelL 



Hab. Discovered in eastern tropical Australia during Dr. Leichhardt's 

 exploring expedition, by Mr. D. Bunce, and now cultivated in the 

 Botanic Garden at Melbourne, 



A small shrub, with oblong or ovate-cordate crenate leaves, which 

 are covered underneath with a grey tomentum. 



New genus: Howittia, F. MuelL — Calyx five-cleft, without an in- 

 volucre, shorter than the petals. Stamens numerous, all separately 

 emerginoj from the tube. Anthers kidney-shaped, one-celled. Pollm- 



grains globose, scabrous. Styles three, connate into one. Stigma club- 



The 



forms 



as Spergula saginoides has to be separated from Sagina procumlefis, — En. 



