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Borneo, considering its proximity to the Philippines, and the 
two distinct marine banks connecting that island with the Ar- 
chipelago, some evidence of previous land connections, does 
not show an especially striking floristic affinity to the Philip- 
pines, but as in the case of Java, our more complete know- 
ledge of the flora of that island has enabled us to compile a 
rather long list of species common to that island and the 
Philippines, so our lack of knowledge of the flora of Borneo, 
and of the two intervening groups, Palawan to the north, and 
the Sulu Archipelago to the south, is doubtless the greatest 
factor limiting the list of species common and confined to 
Borneo and the Philippines. Notwithstanding our comparatively 
little knowledge of the Bornean flora, a considerable number 
of species are known only from that island and the Phillip- 
pines, and at the same time the list of species extending from 
the Malay Peninsula through Borneo to the Philippines, and 
from Java through Borneo to the Philippines enumerated above, 
must not be ignored. The following species are known only 
from Borneo and the Phillipines: Asplenium scolopendroides J. 5m., 
Monogramma trichoidea J. Sm., Polypodium pediculatum C. Chr., P. 
oodes Kze., P. sablanianum Christ., Polybotrya stenosemioides Copel., 
Tectaria crenata Copel., Dacrydium falciforme Pilg., Hypolytrum virt- 
dinux Clarke, Scleria Motleyi Clarke, Patersonia Lowii Stapf, Cyr- 
toptera squalida Reichb. f., Quercus reflewa King, Fvcus stipulosa Miq., 
Pipturus asper Wedd., Myristica guatteriifolia A. DC., Shorea squa- 
mata Dyer, Tristania decorticata Merr., Astronia Rolfei Vid., Didiscus 
saniculaefolius Merr., Leucopogon suaveolens Hook. f., Ardisia Perrot- 
teliana A. DC., A. serrata Pers., Discocalyx cybianthoides Mez, Mono- 
phyllea Lowei Clarke, Nauclea purpurascens Korth., J. strigosa Korth., 
Uncaria Hookeri Vid., U. insignis DC. while the Acanthaceous genus 
Hallieracantha, the only one confined to the two areas, has 
eighteen species in Borneo and one in the Philippines. 
The above list by no means shows all the relationships be- 
tween Borneo and the Philippines, for a certain number of 
species common to both, but extending to other regions, must 
be considered. From Borneo, Celebes and the Philippines we 
