292 
MERRILL. 
UMBELLIFER2E. 
DIDISCUS DC. 
Didiscus saniculaefolius (Stapf) Trachymene saniculaefolia Stapf in Trans. 
Linn. Soc. Bot. II. 4 (1894) 167; Hook. Icon. IV. 4 (1895) pi. 2308. 
In open heaths at 2,400 m. alt. (No. 6174), locally abundant, but found only 
in the open heaths associated with Gleichenia, Lycopodium, Dipteris, Vaccinium, 
Leptospermum, Isachne, Drosera, Patersonia, etc. 
While the above specimens differ slightly from the description and figure given 
by Stapf, still I can detect no constant characters by which the Philippine form 
can he distinguished from the Bornean, and without comparison with the type 
material I do not care to describe the Halcon plant as a new species. The genus 
is new to the Philippine flora, and its discovery is another link in the chain of 
evidence regarding possible previous land connections with Borneo on the one 
hand, and with Australia on the other. Didiscus saniculaefolius was previously 
known only from Mount Kinabalu, North Borneo, being related to the Australian 
D. humilis. Of the genus, about fourteen species are recognized, twelve in Aus- 
tralia, one in New Caledonia and one in Mindoro and Borneo; of the genus 
Trachymene, in which the above species w'as placed by Stapf, about twelve species 
.are recognized, all the others confined to Australia. 
CLETHRACEA3. 
CLETHRA Linn. 
Clethra lancifolia Turcz. in Bull. Soc. Nat. Mosc. 36" (1863) 231. 
In forests at 700 m. alt. (No. 5575) ; also collected by Merritt in June, 1906 
at 2,200 m. alt. (No. 4455). 
Previously known only from the mountains of Luzon and Negros. 
ERICACEAE. 
RHODODENDRON Linn. 
Rhododendron quadrasianum Vid. Rev. PI. Vase. Philip. (1886) 170. 
- Terrestrial and epiphytic, mossy ridge-forests at 1,350 m. alt. (No. 6158) ; 
also collected by Merritt in forests at 1,600 m. alt. (No. 4455). 
On most of the higher mountains of the Philippines from northern Luzon to 
southern Mindanao. Endemic in the Philippines. 
Rhododendron rosmarinifolium Vid. 1. c. 172. 
In open heaths at 2,400 in., alt. (No. 5736) . 
Previously known only from the mountains of northern Luzon; the Halcon 
specimens not quite typical, the leaves shorter and broader than in specimens 
from northern Luzon. This is probably the form reported from “Dulangao” (a 
spur of Halcon) by Rendle, as the Bornean Rhododendron cuneifolium Stapf, and 
appears to be rather intermediate between R. rosmarinifolium and R. cuneifolium, 
but nearer the former. 
GAULTHERIA Linn. 
Gaultheria cumingiana Vid. Phan. Cuming. Philip. (1885) 184. 
Subscandent in ridge forests 1,800 to 2,200 m. alt. (No. 5725). 
Previously known only from the mountains of Luzon and Formosa. 
