248 The Philippine Journal of Science me 



Microlaena, Ascarina, Phrygilanthus, Spiraeopsis, Clianthus, 

 Wallaceodendron, Koordersiodendron, Reinwardtiodendron, Stro- 

 phioblachia, Neotrewia, Oncocarpus, Pleiogynium, Tr^istira, 

 Osbomia, Anompanax, Lepiniopsis, Dedea, Dolicholobium, Euca- 

 lyptus, Pimelea, Euphorianthus, Vavaea (also in Java), Xanthos- 

 temon, Schuurmansia, Ganophyllum, Uncinia, Normanbya, 

 Pothoidium, Macropsychanthus, Tetraplasandra (also in Hawaii), 

 Couthovia, Nycticalos, Calogyne (also in southern China), 

 Phacelophrynium, and Paralstonia. Here we have a list of 

 nearly forty genera, many of them monotypic, and very few that 

 contain numerous species, confined to the Philippines and to 

 the islands to the south and southeast. No list at all approach- 

 ing this can be compiled for the Philippines and the islands 

 to the west and southwest, or the Sunda Islands proper, including 

 also the Malay Peninsula. A similar list of genera confined 

 to this area would include practically only Eusuderoxylon, 

 Philbornea, Koompassia, Kunstleria, Clemensia, Polytrema, 

 Hallieracantha, Monophyllea, and Adinabotrys (Whitfordioden- 

 dron) . 



As to the limited distribution of species, the special distribu- 

 tion between the Philippines and the islands to the south and 

 southeast is strongly developed, in close correspondence with 

 the special generic relationships, while that with the islands to 

 the west and southwest is correspondingly weak. So far as 

 deductions can be drawn on the basis of our present knowledge 

 of the Philippine and Malayan floras, the evidence preponderat- 

 ing^ points to a closer connection between the Philippines and 

 the regions to the south and southeast than with the islands 

 to the west and southwest of the Archipelago. At any rate, 

 the evidences of floristic relationships between the Philippines 

 and Celebes and the Moluccas is so great that the systematist 

 working on the flora of either area should give special attention 

 to the species already described from the other area in working 

 up his material. 



In connection with the present enumeration of Amboina plants 

 included in the series Reliquiae Robinsonianae, I am indebted 

 to Doctor O. Beccari, Florence, Italy, for the determination of the 

 palms; to M. C. de Candolle, Geneva, Switzerland, for the treat- 

 ment of the genus Piper; to Doctor Th. Valeton, Buitenzorg, 

 Java, for the treatment of the Marantaceae; to J. Sykes Gamble 

 Esq., East Liss, Hants, England, for assistance in determining 

 the identity of the single bamboo enumerated, and to Mr. G. K. 

 Merrill, Rockland, Maine, U. S. A., for the consideration of the 

 lichens. 



