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"Diagram of flower of Sweet-pea (Lathyrus), showing five parts of the calyx, of which two are superior, one inferior, and two lateral; five parts of the corolla, of which one is superior, two inferior, and two lateral; ten stamens in two rows; one carpel, in consequence of four being undeveloped." — Encyclopedia Britanica, 1893

Sweet-pea

"Diagram of flower of Sweet-pea (Lathyrus), showing five parts of the calyx, of which two are superior,…