306 



BOTANY. 



(= irregular and monosymmetrical, Fig. SOO). In the latter there is 

 generally more or less of an abortion of certain parts ; i.e., one or 

 more of the sepals, petals, stamens, or pistils are but partially devel- 

 oped, appearing in the flower as rudiments only. Sometimes this 

 is so marked as to result in the complete suppression of 'certain 

 parts. 



Suppression of Parts — It not infrequently happens in both actino- 

 morphic and zygomorphic flowers that entire whorls are suppressed ; 

 this gives rise to a number of terms, as follows : 



When all the whorls are present (not necessarily, however, all 

 members of all the whorls) the flower is said to be complete ; when 

 one or more of the whorls are suppressed, the flower is incomplete. 



Fig. 199. Fig. 200. 



Fia. 199.— Aotinomorphic flower of Marsh-marigold (Caltha). 

 Fig. 200.— Zygomorphic flowers of Figwort (Soropliularia). 1. In front 

 view ; 2. Side view or a section from back to front. 



As to its perianth, the flower is said to be 

 Bichlamydeous, when both the whorls of the perianth are present; 

 Monochlamydeous, when but one (usually the calyx) is present ; 

 Apetalous, when the corolla is wanting ; 



Aehlamydeous, or naked, when both calyx and corolla are want- 

 ing. 



