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Question : What is a floral diagram ? What special features does a floral diagram inform ? |
| Answer» Solution :A floral diagram is the diagrammatic representation of the ground plan of a flower illustrating the number, arrangement and interrelationship of various floral parts as PROJECTED in the transverse plane. The special features, which a floral diagram informs, are-(i) Symmetry of the flower (i.e., actinomorphic or zygomorphic) , (ii) Sex of the flower (i.e., bisexual or unisexual , male or female , etc), (iii) Bracts present or absent, bracteoles present or absent, position of bracts and bracteoles in relation to other floral parts, (iv) Number of floral cyclic (i.e., tetracyclic, petacyclic, etc.) , (v) Number of floral parts (i.e., Sepals, petals, stamens, staminodes, carpels, etc.) , (vi) Position of oddsepal or odd PETAL (i.e., anterior or posterior), if the number of sepal or petal is odd, (vii)Aestivation of sepals and petals (i.e., valvate, twisted, imbricate, etc.) , (viii) Number of stamens arranged in one or more than one whorl, their position in relation to petals, ATTACHMENT of stamens with petals or free, adalphous CONDITION, monothecous or bithecous, extrorse or introse, etc. (ix) number of carpels, free or fused, number of locules, number of ovules in each locule, type of placentation, any special feature (such as SWOLLEN placenta, oblique ovary, false septum, etc.), (x) Position of floral parts in relation with the mother axis. | |