23,5 Dicker son: Baguio Plateau 441 



Petalonema, and Merrittia, are monotypic, and are confined not only to 

 the Philippines, but also to the Mountain Province. 



In addition to these genera, other essentially temperate or subtemperate 

 groups are much more strongly developed in the Benguet-Lepanto region 

 than in other parts of the Philippines, being represented there by from one 

 to several species, elsewhere in the Philippines usually by one or few 

 forms and chiefly at higher altitudes farther south. They are — 

 Potamogeton. Gentiana. 



Carex. Cynoglossum. 



Juncus. Ajuga. 



Rubus. Salvia. 



Smithia. Sophubia. 



Impatiens. Mosla. 



Hypericum. Lobelia. 



Viola. Bidens. 



Vaccinium. Gnaphalium. 



Rhododendron. Artemisia. 



Lysimachia. Eupatorium. 



Australian types are poorly represented by two species of Halorrhagis, 

 one endemic, the other extending from India to Japan southward to New 

 Zealand, and Uncinia rupestris Raoul, in Luzon, Australia, and Hawaii. 

 Gaultheria borneensis Stapf, known from Borneo (Mount Kinabalu), For- 

 mosa, and Benguet, is most closely allied to a New Zealand species. 

 Our two endemic species of Ranunculus, confined to the Benguet-Bontoc 

 region, find their closest allies in Australia and New Zealand, not on the 

 Asiatic Continent. 



Baguio Plateau, in a restrictive sense, is characterized by the dominance 

 of Pinus insula-ris. In general, the flora of Baguio and vicinity, including 

 Mount Santo Tomas, is very similar to that of other parts of the Mountain 

 Province, lacking, however, certain genera that are found on the higher 

 mountain peaks north of Baguio; namely, Aniselytron, Anthox 

 Deschampsia, Monostachya, Poa, Luzula, Saururns, Ranunculus, Sarcococca, 

 Loheria, Bythophytum, Peracarpa, and Solidago. These genera, however, 

 occur at Pauai (Haight's Place), on Mount Pulog, and on other high 

 mountains in northern Benguet, in Lepanto, Bontoc, etc. Generally speak- 

 ing, the Baguio flora is characterized by the occurrence of the genera 

 enumerated for the Benguet-Bontoc region as a whole, eliminating the 

 thirteen genera just enumerated. In most cases the last thirteen genera 

 are represented in the Philippines by one species only; Luzula and Ranun- 

 culus have two species each. Tropical types, that is, families, genera, 

 and species essentially characteristic of the Malayan Archipelago and 

 the low altitudes of the Philippines, are no more prominently represented 

 on the Baguio Plateau than they are in any other part of the Mountain 

 Province. 



Among the genera essentially confined to the Benguet-Bontoc region, so 

 far as their occurrence in the Philippines is concerned, there are about 

 seventeen that have adaptations for their dissemination through the 

 medium of wind, and sixteen species which are apparently distributed 

 by their fleshy fruits being eaten by birds. In the remaining thirty-seven 



