380 
MERRILL. 
2. R. apoanum Stein in Gartenflora 34 (1885) 194, pi. 1196; Vidal Rev. PI. 
Vase. Filip. (1886) 172; Merr. 1. c. 43. 
It. sp. affine It. retuso Benn., Vidal Sinopsis Atlas (1883) t. 53, f. E. 
R. jasminiflorum F.-Vill. Nov. App. (1883) 353, non Hook. 
Mindanao, District of Davao, Mount Apo, DeVore & Hoover 293, 315, May, 
1903; Copeland 1045, 1440, April and October, 1904; Williams 2559, March, 1905, 
altitude 2,500 to 3,100 in. 
A species known only from Mount Apo, manifestly allied to Rhododendron 
tubiflorum DC., of Java, and less closely allied to R. celebicum Miq., of Celebes. 
3. R. xanthopetalum Merr. in Govt. Lab. Publ. (Philip.) 2S (1905) 41; 
Philip. Journ. Sci. 1 (1906) Suppl. 111. 
Luzon, Province of Bataan, Mount Mariveles, Whitford 332, May, 1904; For. 
Bur. 6279 Curran, February, 1907, altitude 1,200 m. Mindoko, Ibalo River, For. 
Bur. 11429 Merritt, May, 1908, altitude 800 m. 
An epiphytic shrub with yellow flowers, apparently rare; allied to Rhododen- 
dron teysmanni Miq., of Java, Sumatra, and ? Celebes. 
4. R. nortonae Merr. in Philip. Journ. Sci. 1 (1906) Suppl. 220. 
Mindanao, Lake Lanao, Camp Keithley, Mrs. Clemens 500, an epiphyte, 
altitude about 800 m, known only from this locality. 
5. R. kochii Stein in Gartenflora 34 (1885) 193, t. 1195 ; Vidal Rev. PI. 
Vase. Filip. (1886) 41; Merr. in Govt. Lab. Publ. ( Philip. ) 29 (1905) 41. 
It. schaderibergii Merr. 1. c., pro parte, non Warb. 
It. javanicum Vid. Rev. PI. Vase. Filip. (1886) 170; F.-Vill. Nov. App. (1883) 
353, non Blume. 
It. sp. (aff. R. javanicum) Vidal Sinopsis Atlas (1883) t. 60, f. F. 
Luzon, Province of Bataan, Mount Mariveles, Merrill 3255; Whitford 450; 
Elmer 6856; For. Bur. 7 90, 2117 Borden; Leiberg 6033; For. Bur. 6284 Curran; 
Bur. 8ci. 1629 Foxworthy ; Topping 806, altitude 1,000 to 1,400 m: Province of 
Tayabas, Mount Banajao, Whitford 95S; For. Bur. 7868 Curran & Merritt, 
altitude 1,800 to 2,250 m. Mindanao, Province of Misamis, Mount Malindajig, 
For. Bur. 4074 Mearns cC- Hutchinson, May, 1906, altitude 1,800 m: District of 
Davao, Mount Apo, DeVore & Hoover 73bis. 
Many of the above specimens were previously erroneously identified by me as 
Rhododendron schadenhergii Warb., from which they differ notably in the hirsute 
ovary. The shape of the leaves is variable, and but few of the specimens are as 
prominently acuminate as shown in the original figure, and they average smaller 
than the measurements given in the original description. The species is described 
as having five stamens, but the figure apparently shows ten, the latter number 
agreeing with our specimens. 
6. R. schadenbergi i Warb. in Perk. Frag. FI. Philip. (1905) 172; Merr. 1. c. 
40, pro parte. 
Luzon, Province of Abra, Schadenberg in Herb. Berol.: Province of Benguet, 
Mount Santo Tomas, Williams 990, 1348; Baguio, Elmer 6519. 
This species, as here interpreted, is closely allied to R. kochii Stein, differing 
notably in its glabrous ovaries. The type, which I have seen in the Berlin 
Herbarium, is in very poor condition, having been dried out from alcoholic 
material, and consequently much shriveled, so that an examination of it was very 
unsatisfactory : consequently my conception of the species has been based largely 
on the elaborate original description, with which the above specimens agree fairly 
well. Most of the specimens previously referred by me to this species are, I 
believe, referable to Rhododendron kochii Stein. 
