PHILIPPINE ERICACE2E. 
379 
4. RHODODENDRON Linn. 
Leaves acuminate or acute. 
Leaves and branches densely appressed-liirsute-setose 1. R. subsessile 
Leaves and branches glabrous, or at most only lepidote. 
Flowers 3 cm long or less. 
Flowers 1.5 to 2 cm long, red; leaves 6 cm long 2. R. apoanum 
Mowers 3 cm long, yellow; leaves 8 to 10 cm long 3. R. xanthopetalum 
Flowers 3.5 to 6 cm long. 
Leaves very densely brown-lepidote beneath; flowers tubular, crimson, 
about 5 cm long 4. R. nortonae 
Leaves glabrous beneath or with scattered lepidote scales only. 
Ovary rather densely hirsute - 5. R. kochii 
Ovary glabrous. 
Corolla white, 3.5 to 4 cm long; leaves sharply acuminate. 
6. R. schadenbergii 
Corolla red, 5 to 6 cm long; leaves acute or slightly acuminate, dull. 
7. R. spectabile 
Corolla yellow, 4.5 to 5 cm long; leaves acute or slightly acuminate, 
rarely obtuse, shining 8. R. dementis 
Leaves obtuse, rounded, or emarginate. 
Flowers 3 to 4.5 cm long, white. 
Flowers 3 cm long, subcampanulate; leaves usually 2.5 to 4.5 cm long, rarely 
5.5 cm in length 9. R. vidalii 
Flowers 4 to 4.5 cm long, infundibuliform ; leaves 6 to 8 cm long. 
10. R. mindanaense 
Flowers 4 cm long, the corolla tubular, slender; leaves 4 to 6 cm long. 
11. R. copelandi 
Flowers 2 to 2.5 cm long, red. 
Flowers 2.5 cm long, campanulate. 
. Leaves oblong-obovate or oblong-oblanceolate, 2.5 to 5.5 cm long. 
12. R. cnrranii 
Leaves obovate or orbicular-obovate, rarely oval, 2.5 to 5.5 cm long. 
13. R. whiteheadii 
Flowers 2 cm long, tubular ; leaves narrowly oblong-obovate. 
14. R. malindangense 
Flowers 1.5 cm long or less. 
Flowers mostly 1.5 cm long; leaves 5 to 9 mm wide, sometimes narrower, 
narrowly obovate-oblong 15. R. quadrasianum 
Flowers mostly about 1 cm long; leaves linear-oblong, mostly 2 to 4 mm 
wide 16. R. rosmarinifolium 
1. R. subsessile Kendle in Journ. Bot. 34 (1896) 357; Merr. in Govt. Lab. 
Publ. (Philip.) 29 (1905) 40. 
Luzon, District of Lepanto, Mount Data, Whitehead , in Herb. Mus. Brit, 
(type) ; Merrill 1/606: Province of Benguet, Suyoc to Pauai, Merrill 1/690; Pauai, 
Bur. Sci. 1/275 Mearns; Mount Tonglon (Santo Tomas), For. Bur. 5032 Curran; 
Mearns s. n. ; Merrill 1/815; Williams 1223, 2001; Elmer 5799; For. Bur. 11090 
Whitford ; For. Bur. 922 Barnes. 
Widely distributed and very common in the highlands of northern Luzon, from 
1,800 to 2.250 m altitude: apparently very closely allied to the Formosan R 
oldhami Maxim. 
