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"Diagram of the symmetrical trimerous flower of Fritillary, having three divisions of the two outer whorls, and of the pistil in the center, and six stamens in two rows." — Encyclopedia Britanica, 1893

Fritillary

"Diagram of the symmetrical trimerous flower of Fritillary, having three divisions of the two outer…

"Diagram of the trimerous symmetrical flower of Iris. There are three alternating divisions of each whorl. Below is a single bracket." — Encyclopedia Britanica, 1893

Iris

"Diagram of the trimerous symmetrical flower of Iris. There are three alternating divisions of each…