Key. 



II 



Ovary and pod 2-celled by the meeting of 2 parietal placentae. Calyx 

 and corolla more or less 2-lipped. Trees or woody climbers. 



BiGNONIACE.E, page IC7. 



Ovary and pod 2-celIed; placentse axillary; seeds mostly few on 



hooked projections, Acanthace.«, page 108. 



Ovary 2-cened; placentae axillary, ovules mostly numerous, not on 



hooked projections. Scrophulariace,*:, page 103. 



Corolla regular. 



Ovaries 2, united only at the top to a fleshy disk; stamens monadel- 

 phoiis; pollen in horny masses. AscLEPiADACE^e, page 91. 



Ovary i. 



Deeply 4-lobed; chiefly rough, hairy herbs. 



BoRAGiNACE.E, page 96. 

 Entire, i-celled, with 2 parietal placentse (sometimes appearing 

 2-celled by union of placentae); usually hairy herbs with 

 toothed, lobed, or divided leaves. 



HvDROPHVLLACE^, page 95. 

 2-celled; stamens 2-4, ovules borne on hooked projections. 



AcANTHACE-«, page 108. 

 2-celIed; stamens 4; flowers in spikes; chiefly stemless herbs. 



Plantaginace/e, page 109. 

 2-celled; stamens 2; trees or shrubs. Oleace^e, page 90. 



3-celled; style 3-lobed; corolla lobes 5; stamens 5. 



PoLEMONiACE«, page 94. 



2-4-celled; T-2 ovules in each cell; twining or slender trailing 



herbs; leaves alternate. Convolvulace*, page 92. 



2-4-celled, with i erect ovule in each cell; style slender, stigma 



mostly 2-lobed, stamens 4. Verbenace*, page 98. 



2*celled (rarely 3-5-ceUed); many ovules on axillary placentae. 



SOLANACEf, page lOI. 



