LESSONS IN ELEMENTARY BOTANY. 



Explanations 



1 Solitary in axils 



2 Bract 



3 Bracteoles 



4 Involucre 



5 Spathe 

 (i Raceme 



7 Panicle 



8 Spike 



9 Corymb 



10 Umbel 



11 Head 



12 Cyme 



13 Imaginary flower in section 



of Plate III. 



14 Polypetalous corolla 



15 Sympetalous corolla 



16 Epipetalous stamen 



17 Hypogynous flower 



18 Perigynous flower 



19 Epigynous flower 



20 Apocarpous ovary in cross section 



21 Syncarpous multilocular axile pla- 



centas 



22 Syncarpous unilocular parietal pla- 



centas 



23 Syncarpous unilocular free-central 



placenta 



