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"Transition from bracts to sepals in a cactus flower." -Bergen, 1896

Bracts to Sepals

"Transition from bracts to sepals in a cactus flower." -Bergen, 1896

In the Stramonium, the five sepals are united into a cup or tube.

Flower

In the Stramonium, the five sepals are united into a cup or tube.

In the Honeysuckle the sepals fuse to form a tube.

Flower

In the Honeysuckle the sepals fuse to form a tube.

In the Harebell, the tube is wide and the border spreads like a bell.

Flower

In the Harebell, the tube is wide and the border spreads like a bell.

In Phlox, the tube spreads suddenly into a flat boder.

Flower

In Phlox, the tube spreads suddenly into a flat boder.

Wheel-shaped flower of Nightshade.

Flower

Wheel-shaped flower of Nightshade.

"a, flower of Caltha palustris, showing the petaloid sepals s." -Whitney, 1911

Kingcup

"a, flower of Caltha palustris, showing the petaloid sepals s." -Whitney, 1911

"b, one of the sepals" of the flower of Caltha palustris, or Kingcup. -Whitney, 1911

Kingcup Sepal

"b, one of the sepals" of the flower of Caltha palustris, or Kingcup. -Whitney, 1911

The sepals are the three narrower parts situated behind, and overlapped by, the petals. The dark, central spot is the opening of the nectary.

Flower of Laelia Albida

The sepals are the three narrower parts situated behind, and overlapped by, the petals. The dark, central…

An illustration showing a "floral diagram of [the' Viola [plant], showing arrangement of parts in horizontal plan. b, pair of bractoeles below the flower; s, sepals; p, petals; st, stamens; o, ovary" (Britannica, 102).

Viola Diagram

An illustration showing a "floral diagram of [the' Viola [plant], showing arrangement of parts in horizontal…