ft . calyx (3-)5-toothed or 

 -lobed, or nearly entire; 

 corolla 5-lobed. 

 O- calyx 3 or 5-toothed 

 or lobed, narrow, not 

 spreading . . . 21. Clerodendron. 

 OO. calyx indistinctly 5- 

 lobed or nearly entire, 

 widely spreading 22. HoLMSKjcEtDiA. 

 (3. fruit a 4-valvate capsule 



Tribe III. CARYOPTERIDOIDE^. 



1. calyx unaltered in fruit; leaves 

 pinnately composed . 23. Peronema. 



2. calyx with enlarged, membra- 

 nous lobes in fruit; leaves one 

 or two times digitately com- 

 posed 24. Petr^ovitex. 



b. ovules apically attached, pendu- 

 lous, orthotropical. 

 0!. ovary imperfectly 2-celled; fruits 



dry, 1 -seeded . . Tribe IV. SYMPHOREMOIDE^. 



1. involucral bracts 6. 



I. flowers 6— 18-merous . 25. Symphorema. 



II. flowers 5-merous . . 26. Sphenodesme. 



2. involucral bracts 3—4 . 27. Congea. 

 f3. ovary imperfectly 4-celled; fruit 



a 1 -seeded, bivalvate capsule 



Tribe V. AVICENNIOIDE^E 



28. AviCENNlA. 



Tabula for determining the oenus. 



1. a. Fertile stamens 2 2. 



b. Fertile stamens 4, or if 5, then all leaves opposite 3. 



c. Fertile stamens 5 or more, or, if 4, then always some 

 alternate leaves between the pairs of opposite ones 27. 



2. a. Leaves simple 4. Stachytarpheta p. 19. 



b. Leaves pinnately composed, with winged rhachis 



23. Peronema p. 321. 



