SEED-BEARING PLANTS 449 
400. Complete Flowers. In the majority of Angio- 
sperms the flower, in addition to the essential organs, 
FIG. 333. Arrow-leaf (Sagittaria). At the left, branches with staminate 
flowers only; in the middle, branches with pistillate flowers only; at the 
right, pistillate branch, bearing fruit. 
possesses a calyx or a corolla, or both. Flowers possessing 
both kinds of floral envelopes and both kinds of essential 
organs are called complete. 
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