Mr Yapp , On Plants from the Malay Peninsula. 159 
Notes on neiu and interesting Plants from the Malay Penin- 
sula. By R. H. Yapp, B.A., Gonville and Cams College, Cam- 
bridge. 
[ Received 26 March 1901.] 
With one or two exceptions, the plants which form the subject 
of these notes were collected on Gunong Inas, a mountain nearly 
6000 feet high, situated on the northern confines of Perak, one of 
the western states of the Malay Peninsula. 
The mountain ranges of this region, which are only partially 
explored and somewhat inaccessible, possess a wonderfully rich 
flora, which is quite unaffected by the admixture of species intro- 
duced from other tropical countries, which form such a marked 
feature of the vegetation of the plains, especially in the neighbour- 
hood of the rivers and sea-coast. A number of the species to be 
mentioned are probably new, and these will be described else- 
where in due course. Others are introduced here on account 
of some special interest, biological or otherwise, which attaches to 
them. 
Dicotyledons. 
In the Natural Order Polygalaceae there is a species of Poly- 
gala , probably new, at least to the Peninsula, for, although very 
closely allied to Polygala arillata, Hamilt., the latter species 
also is unknown from the Malay Peninsula, though it is found 
both in India and in the Malay Archipelago. The specimen 
in question was found at a height of about 5000 feet, growing on 
the ground in the jungle which, though dwarfed, still covers the 
mountains even at this elevation. 
Among the Celastraceae, Euonymus Wrayi , King, a slender 
shrub, 6 to 9 feet high, is interesting on account of its rarity. It 
has been found only by two previous collectors, once in Perak and 
once in Pahang. 
Of the Rubiaceae two plants merit attention. A species of 
Lucmaea, which climbs by adventitious roots, and was found in 
the low-lying lands at the foot of the mountain. It is identical 
with an undescribed specimen in the Kew Herbarium, also from 
Perak, collected by Ridley. 
