* 
H 
-t-** 
THE FI.ORA OF MOUNT HALCON. 255 
On the main riclge at an altitude of 2,400 meters the montane brusli 
of tlic exposed ridges becomes reduced to a mere heath, eharaeterized by 
open lands with a scant cover of ' grasses and sedges, with scattered 
dwarfed undershrubs and bushes and some very characteristic herbaceous 
plants, a mixture of northern or continental, Bornean and Australian 
types. These heath lands cover considerable areas on the south slopes 
of the main range of ITalcon, but do not extend down to the north slope. 
Tlie characteristic species are Lycopodiiim lialconense, C()])el, /".. cn-- 
numn Linn., forma, Ghichenia dicarpa R. Br., Diptens conjugata var. 
alpl/ia Christ, Miscanikus sinensis And., Isachne hencckei Hack., 7. 
myosotis N'ees, Sclioenns melanodavhjj-'^ Jl. Br., Cladium latifoUtun Merr., 
Gahnia javanica Mor., Centrolepis pldlippinensis Merr., Eriocaulon brevi- 
pedunculaium Merr., Dianella ensifolia DC, Linope hracliyphijlla 
Merr., Fatersoma loivii Stapf., Droscra spatliulata Labill., D. peliala Sni., 
Rubles rolfei Vid., Halorrluigis lialconensis Merr., //. micraniha E. Br., 
Didiscus saniculwf olius Merr., Yaccinium banksU ^lerr., Y. villarii Vid., 
F. whiifordii Merr., Rapanea rchi&a Merr., Utricidaria orblcidaia Wall., 
Uedyotis montana Merr., Leptospermum amboinense Bl., Rhododendron 
quadrasianum Vid., and Adinandm sp. 
The botanical exploration of Ilalcon has added representatives of two 
families new to the Archipelago to our knowledge to the Philippine 
flora, seven genera new to the Islands, fifteen species previously des- 
cribed from surrounding regions, and many new to science. Consider- 
ing the proximity of Borneo to' the Philippines, and the connecting 
chains of islands, the Sulu Archipelago at tlie south, Balabae, Palawan, 
the Calamianes, and the Mindoro chain extending to the north, Bornean 
types in the Philippine flora are comparatively rare, but it is not at all 
surprising to And a considerable number of characteristic Bornean plants 
on Ilalcon, although Copeland^ in the 20G species and varieties of 
vascular cryptogams kiiown from Ilalcon considered but one Oplnoglos- 
mm intermedium, to be of probable Bornean origin. Dacrydium falci- 
forme Pilger, Palersonia lowii Stapf, and BidUcus sanic id cvf olius Merr., 
are known only from Mindoro and Boimeo, Schocnus melanostachys R. 
Br. from Mindoro, Borneo and Australia, Burmannia longlfolia, Becc. 
from Mindoro, Borneo and Malayan Peninsula, Symplocos adcnopliyUa 
Wall., from Mindoro, Borneo, Banca, Singapore and Pennng, while 
Uedyotis eurapiiata Merr., is closely related to a species known only from 
North Borneo. On tlie other hand there is a rather remarkable assem- 
bhige of Australian types on Ilalcon, all at high altitudes. Among these 
may be mentioned Schoenns mehinostachys R. Br., Australia, P>()rneo and 
Mindor, the genus being largely developed in Australia, with few species 
occurring in the Xorthern Hemi.sijhere, Cenirolrpl^ philippinensis Merr., 
*Loc. mt., 121. 
