222 A FLORA OF MANILA 
8. Filaments more or less connate. 
4. Pods indehiscent, septate between the seeds............ 1. Enterolobium 
4. Pods dehiscent or indehiscent, not septate between the seeds. 
5. Pods strongly spirally twisted........................ ‘..... 2. Pithecolobium 
6) Peds athe iy li. eR Oe 2 ee, ee 3. Albizzia 
8, Rilamente :: Preece at ee ool a, ve eee eee 4, Acacia 
2. Stamens as many, or twice as many, as the Se Bhs) 
3. Anthers not gland-tipped. 
4. An erect shrub or small tree; pods straight, flat, smooth. 
5. Leucaena 
4. A suffrutescent, spreading, spiny herb with very sensitive leaves. 
6. Mimosa 
3. Anthers gland-tipped. 
4, Pods indehiscent; shrubs or small trees armed with long spines. 
7. Prosopis 
4. Pods dehiscent; unarmed trees...................0.00-2s--ee-e-+ 8. Adenanthera 
1. Calyx-lobes imbricate; large unarmed trees with bipinnate leaves and 
very numerous small leaflets, the flowers very numerous, in dense 
obovoid heads.................. SB on penea stern Sede Spe tere eae eee RE: 9. Parkia 
B. CAESALPINIOIDEAE 
1. Calyx entire, or the segments above the receptacle more or less united 
into a toothed or lobed tube. 
2. Leaves 2-pinnate; spiny climbing shrubs...................... 10. Mezoneurum 
2. Leaves simple, 2-cleft or lobed; unarmed shrubs, vines, or trees. 
11. Bauhinia 
1. Calyx-segments free or nearly free above the receptacle. 
2. Leaves 2-pinnate. 
3. Calyx-segments valvate; large trees with very showy red and yellow 
flowers and numerous small leaflets... 12. Delonix 
3. Calyx-segments imbricate. 
4. Pods not winged; erect, slightly spiny shrubs........ 13. Caesalpinia 
4. Pods winged on one or both sutures. 
5. Climbing, very spiny shrubs; pods winged along one suture. 
10. Mezoneurum 
5. Erect, unarmed trees with large panicles of showy yellow 
flowers; pods winged along both sutures........ 14. Peltophorum 
2. Leaves 1-pinnate or reduced to single leaflets. 
3. Anthers basified, opening by terminal pores; herbs, shrubs, or trees. 
15. Cassia 
3. Anthers versatile, opening by longitudinal slits. 
4. Ovary or its stipe more or less adherent to the calyx-tube. 
b. Petals 3; pods fleshy ee ee 5 oocb severest 16. Tamarindus 
5. Petal 1. 
6. Perfect stamens 3; seeds not arillate.......20020....... 17. Intsia 
6. Perfect stamens usually 7; seeds arillate................ 18. Pahudia 
4. Ovary quite free from calyx; ovules 1 or 2. rarely 3; petals 5. 
19. Cynometra 
C. PAPILIONATAE 
1. Fruit composed of 1-seeded joints which are usually indehiscent. 
2. Leaves pinnate. 
