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1950 Leaflets op Philippine Botany [Vol. VI, Art. 07 



DIPTEROCARPUS Gaertn. f- 



Section SPHAERALES Drey 

 Dipterocarpus subalpinus Foxw. n. sp. 



Arbor magna. Folia coriacea elliptica-oblonga, acuminata, 

 glabra; 4—11 cm longa, 2.7—7 cm lata; nervis secondares 

 14—16; petiolo 15—28 mm longi. Fructus 9—13 mm dia- 

 metro, 9—13 mm alto* Calycis segmentis 2 majoribus oblongis, 



8.5—12 cm longis, 14—22 mm. latis. 



This species, Dipterocarpus Hasseltii Blume, and Dipterocarpus 

 vernicifluus Blanco are very closely related. Dipterocarpus verni- 

 cifluus and this species have the same kind of fruit; and Dip- 

 terocarpus Hasseltii and this species agree in having glabrous or 

 nearly glabrous buds. The leaves are generally a little smaller 

 than those of the other two species and the number of 

 secondary veins usually greater than in Dipterocarpus Hasseltii. 

 The three short wings of the fruit are also shorter than is the case 

 in Dipterocarpus Hasseltii and are not expanded or rellexed as is 

 usually the case in that species. 



Leaves 4 — 11 cm long, 2.7 — 7 cm broad, glabrous except 

 for scattered stellate hairs along the midrib above and along 

 the secondary veins beneath; secondary veins 14 — 16 pairs; 

 petiole 15 — 28 mm long. Fruit about 9 — 13 mm in diameter 

 and about 9 — 13 mm tall; long calyx wings 8.5 — 12 cm long 

 and 14 — 22 mm wide. Short wings erect or only slightly 

 recurved, 7 — 8 mm long, 6 — 9 mm wide. 



No. 13531, Cabadbaran (Mt. Urdaneta), Province of Agusan, 

 Mindanao, August, 1912. 



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

 and lofty tree in rocky soil of a densely wooded and humid 

 ridge at 3000 feet on mount Ginantawan. Trunk 5 feet in 

 diameter or less, straight, terete, branched mainly at the top 

 of the 100 or more feet high stem; main branches spreading 

 and crookedly rebranched, the twigs relatively short and flex- 

 ible; wood moderately hard; the outer three inches whitish, 

 the central mass latericius brown, tasteless, slightly odorous, 

 with resin; bark smoothish, grayish brown on the surface, 

 testaceus otherwise; twig ends ascendingly curved, green; 

 leaves chartaceous, conduplicate on the upper much deeper 

 green and lucid side, much paler beneath; infrutescence axil- 



