382 
MERRILL. 
15. R. quadrasianum Vidal Rev. PI. Vase. Filip. (1886) 170; Merr. Govt. 
Lab. Publ. (Philip.) 29 (1905) 43; Philip. Journ. Sei. 1 (1606) Suppl. Ill; 1. c. 
2 (1907) Bot. 292. 
R. retusum F.-Vill. Nov. App. (1883) 353, non R. Br. 
Luzon, Province of Zambales, Mount Pinatubo, Bur. Sci. 2537 Foxworthy, alt. 
1,600 to 1,800 m: Province of Bataan, Mount Mariveles, Leiberg 6032 ; Elmer 
6765 ; For. Bur. 2090 Borden; Whitford 278, 110 4; Merrill 3215, altitude 1,200 
to 1,400 m: Province of Batangas, Mount Agas, For. Bur. 7716 Curran d Merrit, 
November, 1907, altitude 1,050 m: Province of Tayabas, Mount Banajao, Cuming 
804; For. Bur. 872 Klemme; For. Bur. 7888 Curran d Merritt, altitude about 
2,200 m: Province of Laguna, Mount Maquiling, For. Bur. 7703 Curran d Merritt, 
altitude 1,100 m: Province of Albay, Mount Mayon, Bur. Sci. 6502 Robinson, 
altitude 1,300 m. Mindoro, Mount Ilalcon, Merrill 6158; For. Bur. 1/408 Mer- 
ritt, latitude 1,350 to 1,600 m. Negros, Canlaon Volcano, Banks. Mindanao, 
District of Davao, Mount Apo, Williams 2543 ; Copeland 1036; DeVore d Hoover 
287, altitude 2,600 to 3,000 m. 
Apparently the most common and widely distributed Philippine Rhododendron, 
found on most or all high mountains from north-central Luzon to south-eastern 
Mindanao. 
Var. intermedium var. nov. 
R. cuneifolium Rendle in Journ. Bot. 34 (1906) 355; Merr. in Govt. Lab. Publ. 
(Philip.) 29 (1905) 43, non Stapf. 
A form intermediate between R. quadrasianum Vid., and R. rosmarinifolium 
Vid., with the leaf-form of the former, but with leaves almost as narrow as the 
latter, and might with almost equal propriety be considered a veriety of R. 
rosmarinifolium. From the leaf-form it appears to be dwarfed R. quadrasianum, 
and is accordingly considered under that species. It is the form credited to the 
Philippines by Rendle as R. cuneifolium Stapf, a Bornean species, and can be 
readily distinguished from Stapf’s species by its pubescent pedicels. 
Luzon, Province of Zambales, Mount Tapulao, For. Bur. 8063, 8086 Curran d 
Merritt; Bur. Sci. 5082a Ramos, December, 1907, altitude about 2,100 m. 
Mindoro, Mount Halcon, Merrill 5736 ; Whitehead in Herb. Mus. Brit. 
I have examined Whitehead’s specimen, cited above, and consider it to be 
referable here, rather than to R. cuneifolium Stapf, although it is closely related 
to the Bornean species. 
16. R. rosmarinifolium Vidal Rev. PI. Vase. Filip. (1886) 172; Merr. 1. c. 43. 
Luzon, Province of Benguet, Baguio, Elmer 6377 ; Mount Tonglon (Santo 
Tomas), Elmer 5798; Williams 1335; For. Bur. 5035 Curran; Suyoc to Pauai, 
Merrill 1/752, altitude 1,800 to 2,200 m. 
The typical form of this species seems to be confined to the table-land of 
north-central Luzon and is very distinct, although manifestly allied to R. quad- 
rasianum Vidal. On mountains farther south intermediate forms occur, as noted 
above. 
