184 



LUSSOJVS WITS PLANTS 



210. "We have observed that the corolla of the 

 squash (Figs. 161, 162) and of the florets of the 

 composites is composed of a single 

 piece, with the margin (or limb) vari- 

 ously toothed or parted. Such flowers 

 are gamopetalous. In the same way, 

 we may say that calices are poly Sep - 

 alous or gamosepalous. 



210a. Gamopetalous means "petals united," but 

 the term should be understood to refer only to the 

 fact that the corolla is in one piece, and not to ex- 

 press any opinion as to 

 whether it is really com- 

 posed of united parts. 

 Monopetalous is often 

 used in the same way 

 as gamopetalous, but 

 etymologioally 

 it means "one- 

 petal ed," and 

 is, therefore, 

 falling into 

 disuse ; al- 

 though one term is not 

 much better than the 

 other in a strict etymo- 

 logical sense. Words 

 soon outgrow their ety- 

 mologies or histories, 

 and are defined by usage. Irregular lipped flower of catalpa. 



Fig 180. 



Labiate corolla 

 of catnip. 



211. For purposes of description, the form of 

 the corolla is designated by technical terms. It 

 is likened to a bell, a trumpet, a wheel, or a sal- 



