

1952 Leaflets op ffl m rtum Botany IVot.. VI, Art. »i 



bract slightly hairy, greenish, 2 inches long, curved back- 

 wards prior to falling; infrutescence axillary, subpendant, few- 

 inches long only, sparingly branched; fruits pendant, dark 

 green except the yellowish exserted nut and the 2 purplish 

 ears.— "Polipos" in Manobo or "Balao" as it is also called 

 by the same natives. Of this species only a few trees were 



observed .' 



Section TUBERCULATI Dyer 



Dipterocarpus Warburghii Brandts in Journ. Linn. Soc. 

 Bot. xxxi (1895) 32, 



I have previously (Philip. Journ. Sci. Bot. vi (1911) 244) 

 referred this species to Dipterocarpus pilosus Roxb., but additional 

 and more complete material convinces me that it is a distinct 

 species and in a different section of the genus. 



First collected by Warburg (No. 14431) near Davao, Min- 

 danao. It was described from rather fragmentary material and 

 its real position long remained in doubt. Mr. Elmers collec- 

 tion gives abundant material for the determination of this. 



As the species is very insufficiently understood, I add 

 some descriptive notes from the material at hand. Leaves 

 with 23 — 25 pairs of secondary nerves, 13.5 — 25 cm long, 

 7 — 13 cm wide, usually glabrous; but with buds that are long 

 ferruginous pilose; petioles 3 — 4 cm long. Fruit as described 

 by Brandis. Flowers borne in lax panicles. Corolla salver form. 

 For a long time, I had thought this fruit to be merely an 

 immature form of Dipterocarpus pilosus Roxb. 



No. 13373, Cabadbaran (Mt. Urdaneta), Province of 

 Agusan, Mindanao, July, 1912. 



This form has also been found in such widely separated 

 regions as Davao, Mindanao and Cagayan, Luzon. 



The field notes with this number are as follows: — "Large 

 lofty tree in very moist rich alluvial soil of a densely for- 

 ested flat at 500 feet altitude; trunk 4 feet in diameter at 

 least, 75 feet high or higher, terete, rather straight, chiefly 

 branched toward the top and forming a spreading crown; wood 

 moderately hard, the outer G inches white, rather suddenly 

 changing to the central brown portion, odorless, slightly bit- 



