estivation's Usage Examples:

- Diagram to illustrate the quincuncial aestivation, in which the parts of the flower are arranged in a spiral cycle, so that I and 2 are wholly external, 4 and 5 are internal, and 3 is partly external and partly overlapped by 1.

- Diagram to illustrate induplicative or induplicate aestivation, in which the parts of the verticil are slightly turned inwards at the edges.

aestivare, to spend the aestas, or summer; the word is sometimes spelled "estivation"), literally "summer residence," a term used in zoology for the condition of torpor into which certain animals pass during the hottest season in hot and dry countries, contrasted with the similar winter condition known as hibernation.

When the parts of a whorl are placed in an exact circle, and are applied to each other by their edges only, without overlapping or being folded, thus resembling the valves of a seed-vessel, the aestivation is valvate (fig.

- Diagram to illustrate reduplicative or reduplicate aestivation, in which the parts of the whorl are slightly turned outwards at the edges.

- Diagram to illustrate valvular or valvate aestivation, in which the parts are placed in a circle, without overlapping or folding.

The circular aestivation is generally associated with a regular calyx and corolla, while the spiral aestivations are connected with irregular as well as with regular forms.

The manner in which the parts are arranged in the flower-bud with respect to each other before opening is the aestivation or praefloration.

- Diagram of a papilionaceous flower, showing vexillary aestivation.

carina may perform a similar office, and then the aestivation is carinal, as in the Judas-tree (Cercis Siliquastrum).

This aestivation is imbricate.

Those forms of aestivation are such as occur in cyclic flowers, and they are included under circular aestivation.

- Diagram to illustrate imbricated aestivation, in which the parts are arranged in a spiral cycle, following the order indicated by the figures I, 2, 3, 4, 5.

Synonyms:

flower bud, aestivation, arrangement,

Antonyms:

activity, action, active, activeness,