The calyx sometimes falls before the flower is full blown, as in the poppy. Its lower portion is the “throat,” and the shape of the organ varies, as will be seen by the illustrations.
Fig. 769.—
| 1. Tubular. | 2. Clavate, or club-shaped. | 3. Tubinate, or top-shaped. |
| 4. Campanulate, or bell-shaped. | 5. Funnel-shaped. | 6. Urceolate, or urn-shaped. |
| 7. Globular. |
The sepals are usually three to five in number. The poppy has two, and the well-known wall-flower four free—that is, disunited—sepals. The primrose possesses five. The calyx is the outside rim of all, and we may thus remember it, because its sepals alternate with the petals of the corolla. The petals may be formed cup-fashion, as in the lily of the valley, and here we have these sepals and petals in groups of three each.
Fig. 770.—Trimerous corolla.
Fig. 771.—Tetramerous.
