3Y2 -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. 
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. hrevipes 
8. Capsule unequally 3-winged 8, B. littlert 
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. palawanensis 
" 5. Leaves densely brown-setose or pubescent on the nerves on the lower 
surface. 
6. Leaves subentire or obscurely undulate-lobed near tlie apex. 
11. B. leptantha 
6. Leaves distinctly angular-lobed or toothed. 
7. Margins with few, short, coarse, triangiilar lobes.-. 12. B. tceheri 
7. Margins sharply toothed or sublobed, the teeth numerous, small 
or of medium size. 
8. Leaves less than 2 cm. wide - 13- ^- ^oheri^ 
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. mcisa 
5. Leaves entire, toothed, or lobed, not laciniate. 
6. Leaves prominently pubescent at least oft the nerves on the lower 
surface. 
7. Leaves suborbieular or reniform - 16. B. mearnsii 
7. Leaves oblong. " ' 
. 8'. Capsule less than 1 ci^ long - 17. B, leytemis 
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 soi ' 
7. Capsules 2 to 2.5 cm long. 
8, Staminate flowers small; leaves mottled 20. B. leucosficta 
8. Staminate flowers large;, leaves not mottled.. 21. B. negrosens%s 
7. Capsules less than 2 cm long, 
• 8. Male flowers exceeding 2 cm in diameter. 
^9. Leaves 14 to 30 em long; staminate flowers 2 to 2.5 cm in 
.■ ■ ' diameter .....:-...j1l. „ :..: 22. B. halconensis 
. . . 9. Leaves less than 10 cm long; male flowers 3 to 3.5 cm in 
* : '• ■ diameter _;„..i...:....: : 2^ 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 
■ . . XO. Leaf-margins coarsely angularly lobed.. 25. B. quercifolia 
. 9. Capsules 10 to 12 mm long. '• '•'*■' 
■ '■ ' '' ■ ■ 10. Leaf-margins ciliate-denticulate 2Q. B. holstert 
10. Leaf-margins not ciliate-dentieulate 27. B. raviosu 
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