xni,c,3 Foxworthy: Philippine Dipterocarpaceae, II 183 



b 1 . Leaves not narrowly oblong. 



c\ Leaves broad, elliptic-oval 7. H. ovalifolia. 



c*. Leaves lanceolate to ovate lanceolate. 



d 1 . Leaves 3 to 6 cm long, with few (5 to 7) pairs of secondary 



veins _ 6. H. sp.. (gyam). 



d 2 . Leaves larger and with a greater number of veins. 

 e 1 . Leaves long acuminate, without domatia. 



f 1 . Calyx-wings more than 3 cm long 9. H. maquilingensis. 



f. Calyx-wings less than 3 cm long 8. H. acuminata. 



e 3 . Leaves not long acuminate, domatia prominent. 



f 1 . Fruit 5 to 6 mm in diameter; wings oblanceolate. 



4. H. plagata. 

 f. Fruit up to 9 cm in diameter; wings broader, sometimes 



almost oblong 5. H. odorata. 



»*. Secondary veins not distant; leaves coriaceous, glabrous, with numerous 

 indistinct and almost parallel secondary veins. 

 b 1 . Leaves 8 to 12 cm long; calyx-wings 4.5 to 5 cm long.. 13. H. malibato. 

 b 1 . Leaves and fruit smaller. 



c 1 . Fruit more than 1 cm long 12. H. glutinosa. 



c 1 . Fruit less than 1 cm long. 



d. 1 Fruit reddish-brown; leaves with domatia™ 10. H. pierrei. 



d 2 . Fruit greenish, leaves without domatia 11. H. foxworthyi. 



1. HOPEA BASILANICA Foxw. 

 Basilan. 



2. HOPEA MINDANENSIS Foxw. 

 Mindanao, Zamboanga. 



3. HOPEA PHILIPPINENSIS Dyer. 



Luzon: Laguna, Tayabas, Camarines, Albay. Negros. Samar. Leytb. 

 Biuran. Mindanao: Agusan, Lanao, Zamboanga. 



4. HOPEA PLAGATA (Blanco) Vidal. 



Luzon: Cagayan, Ilocos Norte, Nueva Vizcaya, Nueva Ecija, Panga- 

 sinan, Tarlac, Zambales, Bataan, Bulacan, Tayabas, Camarines, Sorsogon. 

 Mindoro. Tablas. Bohol. Basilan. Mindanao : Cotabato, Zamboanga. 



5. HOPEA ODORATA Roxb. 



For. Bur. 25889, 26133, Borromeo and Alhambra, both collected in Ba- 

 taan Province, Luzon, in July, 1916, seem to represent this species. The 

 material is in fruit, which looks very much like the figure given by Kor- 

 thals, Verh. Nat. Gesch. Bot. (1839-42) 75, and also much like the fruit 

 figured in Roxburg's PI. Coromandel 3 (1819) 7, t. 210. Vidal, in his 

 Atlas (1883) t. 15, f. A 1-5, figures a form under the name of H. odorata. 

 The leaves and flowers are said to have come from San Miguel de Mayumo, 

 Bulacan Province, Luzon. The form figured seems to be H. plagata, in 

 everything except the fruit, which is copied from Korthals' figure. Hopea 

 odorata occurs in Burma, Siam, Cochinchina, the Andamans, and Borneo. 



6. HOPEA sp. (Gyam). 

 Tawitawi. 



7. HOPEA OVALIFOLIA Boerl. 



Mindanao: Zamboanga, Agusan. Luzon, Camarines. Samar. 



8. HOPEA ACUMINATA Merr. 



Luzon: Cagayan, Ilocos Norte, Nueva Vizcaya, La Union, Pangasinan, 



