What cymose and racemose?

Answer 1

Racemose:in racemose inflorescence the peduncle continues to grow until last flower is formed at its tip. The older floer are towards the base and the younger ones towards the apex. In certain cases peduncle may be flattend and older flowers are towards the margin and younger ones are in the center. Racemose inflorescence has flowing types:1- Typical Raceme:

in a typical raceme the main axis is elongated and bears laterally a number of flowers. each flower has a pedicel or stalk e.g,cassia fistula(amaltas).

2- Spicke:

it is a racemose infloresence in which the main axis is elongated raceme but the flowers are sessile are sessile i.e., without pedicel (stalk). eg. Achyranthus(puth kanda) and bottle brush.

3- Catkin:

it is the spike that usually bears only pistillate or staminate flower e.g. mulberry and willow.

4- Corymb:

in corymb the main axis is comparatively short and stalks of the lower flowers ere longer than upper younger ones. Therefore all the flowers lie at the same level e.g. Iberis(candytuft).

5- Umbel:

In this type of inflorescence, main axis is shortened. Flowers are stalked. Pedicels are of equal size, therefore, all the flowers seems to be arising from nearly the same level e.g. Hydrocotyl(brahmi booti), and Onion etc.

in some cases a number of umbels are persent on the tip of the main axis such a compound inflorescence is called umbel of umbel of compound umel e.g carrot.

6- capitulum:

the capitulum or head is an inflorescence in which the flowers are sessile and croweded togather on a very short axis. it looks like a single flower. e.g. Sunflower and other members of family compositae.

7-panicle:

a branched raceme is called a panicle. e.g, grapes and oat.