296 MB. E. A. ROI/FE ON THE 



Australian and Austro-Malayan element. The small Order 

 Stackhousiaceae consists of eleven species, one endemic in New 

 Zealand, and the remainder all Australian ; nine of them en- 

 demic, but one (8. muricata, Lindl.) occurs also in Luzon, though 

 not yet found in the intervening region. The Liliaceous genus 

 Thysanotus has nineteen species, all Australian ; but one species 

 also occurs in the Philippines and in China. Osbomia octodonta, 

 F. Muell., formerly believed to be endemic in Australia, has now 

 been found indigenous in Luzon, where it is common at Lagui- 

 manoc, in the province of Tayabas. Of other Myrtaceous genera 

 are Xantlwstemon and Leptospermum : the former has thirteen 

 species, two of which are endemic in Australia, ten in New Cale- 

 donia, and one (AT. Verdngonianiis, Naves) in Mindanao; the 

 latter twenty Australian species, eighteen of which are endemic, 

 one (L. scoparium, Forst.) occurring in New Zealand on the one 

 hand, the remaining one (L. flavescens, Sin.) through the Archi- 

 pelago as far as Malacca on the other. Psoralea has eleven 

 Australian species, ten of them endemic, the other (P. badocana, 

 Blanco) occurring again in New Guinea, Panay, and Luzon. The 

 Epacridaceous genus Leucopogon has 118 Australian species, all en- 

 demic ; two occur in New Zealand, also endemic ; and a few others 

 occur in the Malay islands, of which one (L. suaveolens, Hook, f.) 

 is peculiar to Borneo and Mindanao. The large Australian Order 

 Proteacese is represented by Helicia, an outlying genus with 

 about twenty-five species, many of them of very restricted range. 

 The four Australian species are all endemic ; Luzon has three 

 endemic species, Java two or three, Ceylon one, Amboyna one, 

 and Japan one ; one occurs in China, Hong Kong, and Cambodia, 

 two or three are confined to India, besides which there is some 

 undetermined material from Formosa, Borneo, and Sumatra. 

 This genus shows the western migration most distinctly — from 

 Australia to the Moluccas, Java, Sumatra, Malacca, Ceylon, and 

 India ; also the northern one, through Borneo and the Philip- 

 pines to Formosa and Japan. It must also have occurred at a 

 comparatively remote period, for so large an amouut of specific 

 differentiation to have taken place. Again, Buchnera urticafolia, 

 E. Br., is only known from Australia and Luzon ; while Qano- 

 pJiyiium falcatum, Blume, which occurs in these two places, is 

 found also in the intermediate island of New Gruiuea. The ditypic 

 Urticaceous genus Aphananthe has one species peculiar to Aus- 



