MERRILL. 
3. Flowers in terminal or axillary small to large panicles or racemes. 
4. Leaves more or less narrowed on both sides of the midrib toward the 
often subequilateral base. 1 
5. Leaves quite glabrous. 
6. Leaves distinctly obliquely cordate at the base 6. B. agusanensis 
6. Leaves subobtuse or acute at the base, not obliquely cordate. 
7. Leaves 5 to 8 cm long. 
8. Capsule equally 3-winged 7. B. brevipes 
8. Capsule unequally 3-winged 8. B. littleri 
7. Leaves 10 to 15 cm long. 
8. Capsules nearly 2 cm long 9. B. longistipula 
8. Capsules less than 1.5 cm long 10. B. palcwanensis 
5. Leaves densely brown-setose or pubescent on the nerves on the lower 
surface. 
6. Leaves subentire or obscurely undulate-lobed near the apex. 
11. B. leptantha 
6. Leaves distinctly angular-lobed or toothed. 
7. Margins with few, short, coarse, triangular lobes.... 12. B. weberi 
7. Margins sharply toothed or sublobed, the teeth numerous, small 
or of medium size. 
8. Leaves less than 2 cm wide , 13. B. loheri 
8. Leaves 3.5 to 6 cm wide 14. B. jagori 
4. Leaves not narrowed to the base which is always strongly cordate and 
inequilateral. 
5. Leaves deeply laciniately pinnatifid..... 15. B. incisa 
5. Leaves entire, toothed, or lobed, not laeiniate. 
6. Leaves prominently pubescent at least on the nerves on the lower 
surface. 
7. Leaves suborbicular or reniform 16. B. mearnsii 
7. Leaves oblong. 
8. Capsule less than 1 cm long 17. B. leytensis 
8. Capsules 1.5 to 2.5 cm long. 
9. Inflorescence short, congested, 3 cm long or less, the flowers 
subtended by large bracts 18. B. crispipila 
9. Inflorescence lax, the bracts none or small and early deciduous. 
19. B. cumingii 
6. Leaves glabrous or nearly so. 
7. Capsules 2 to 2.5 cm long. 
8. Staminate flowers small; leaves mottled 20. B. leucosticta 
8. Staminate flowers large; leaves not mottled.. 21. B. negrosensis 
7. Capsules less than 2 cm long. 
8. Male flowers exceeding 2 cm in diameter. 
9. Leaves 14 to 30 cm long; staminate flowers 2 to 2.5 cm in 
diameter 22. B. halconensis 
9. Leaves less than 10 cm long; male flowers 3 to 3.5 cm in 
diameter ^H... ; 23. B. merrittii 
8. Male flowers less than 1.5 cm in diameter. 
9. Capsule about 1.5 cm long. 
10. Leaf-margins subentire or toothed, not lobed. 
24. B. contracta 
10. Leaf-margins coarsely angularly lobed.. 25. B. quercifolia 
9. Capsules 10 to 12 mm long. 
10. Leaf-margins ciliate-dentieulate 26. B. bolsteri 
10. Leaf-margins not ciliate-denticulate 27. B. ramosii 
