Flower Anatomy

Are you familiar with the parts of the flower and botantical information about flowers? Here's more information...

The complete flower consists of four sets of parts known as the calyx, corolla, androecium and the yncecium.

The calyx, or outermost set of floral parts is made up of segments known as sepals, which are usually green and whose function it is to protect the delicate flower parts within.

The segments of the corolla are known as petals. They are usully delicate in texture and some color other than green, as the function of the corola is to attract to the flower insects that will transfer the pollen necessary for the formation of seeds.



When the petals of the corolla are approximately the same size and shape, as in the Wild Rose, Poppy, Columbine and Phlox, the corolla is regular; when they are of various sizes and shapes as in the Orchid, Monkshood, Sweet Pea and Snapdragon, the corolla is irregular. When the petals are free from each other as in the Buttercup, Peony, Wallflower and Geranium, the corolla is apopetalos; when they are fused togethe for all or part of their length the corolla is known as sympetalous, as in Petunia, Foxglove, Morning Glory and Trumpet-Creeper. The various combinations, sizes and colors make for endless variety in the flower.

The sepals and petals which constitute the perianth are regarded as the accessory organs of the flowers. The stamens and carpels, because they are necessary for seed production, constitute the essential organs.

The androecium ("male household") is the aggregation of stamens. A typical stamen consists of a slender stalk or filament and the pollen sacs are another. from the anthers are liberated the pollen grains, which contain the male reproductive element of the plant. Variations in the pattern of stamen arrangement are significiant in determining plant relationships.

The gynoecium ("female household"), is the aggregation of carpels which constitutes the innermost set of floral organs ("pistil"). The individual carpel usually consists of the ovary, the style and the stigma. The ovary is the expanded basal portion which contains from one to many ovules. The style generally is a columnar structure between the ovary and the stigma which received the pollen grains.

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