Raceme

The term cluster refers to in botany an inflorescence type.

Grape

In a cluster, the stalked flowers are on the side of a continuous, extended growing stem axis. It is the basic form of the racemösen inflorescence.

This inflorescence type comes as a basic form in many different plant families. A typical example is the (Brassicaceae ), which have almost exclusively as inflorescences grapes. Frequently one finds grapes even in the pea family ( Faboideae ) and hyacinth plants ( Hyacinthaceae ).

Vines form inflorescence as no grapes, but panicles; its fruits are berries ( see Grape).

Bird Vetch (Vicia cracca )

Vineyard Grape ( Muscari neglectum )

Screen grape

If the major axis is compressed, and the flower-bearing secondary axes extended, the result is an umbel- like form, called corymb or shield grape. However, this less common form of inflorescence is about the umbels milk star, in only imperfect terminal expression often in cruciferous vegetables such as shepherd's purse or the loop flowers. When the tansy flower heads are arranged as a shield grape.

A similar expression for the umbel -like shape, there are also in the corymb and Trugdolde.

Umbels - candytuft ( Iberis umbellata )

Shepherd's purse, only the terminal part is doldenartig

Double- screw

If one replaces the flowers of the grape by grape-like part of inflorescences, one obtains a special Dibotryum, the double- screw. This happens only when the lateral petals, one obtains the homöothetische form; also forms the main axis nor a grape from one obtains the heterothetische form. The exchange of flowers in partial inflorescences can also take part in the inflorescences; it results in a new branch level and is called a triple grape or generally from one Tribotryum.

Yellow sweet clover with homöothetischer double screw

Heterothetische double screw

A lift with double screws heterothetischen