The mode of arrangement of sepals or petals in a floral bud is known as aestivation. Draw the various types of aestivation possible for a typical pentamerous flower.
(a) Valvate- e.g., Mustard (Brassica).
(b) Twisted- e.g., China rose (Hibiscus rosa sinensis).
(c) Imbricate- e.g., Cassia, Callistemon, Caesalpinia.
(d) Quincuncial- e.g., Cucurbita (Cucurbitaceae).
(e) Vexillary- e.g., Artabotrys, Polyalthia, Pisum.