Describe racemose inflorescence

Explanation

Central axis stops growing and ends in a flower, further growth is by means of axillary buds. Old flowers present at apex and young flowers at base.
(i) Simple cyme (solitary): Determinate inflorescence consists of a single flower. It may be terminal or axillary, eg. terminal in Trillium grandiflorum and axillary in Hibiscus.
(ii) Monochasial Cyme (uniparous): The main axis ends with a flower. From two lateral bractsonly one branch grows further. It may be helicoid (bostryx) or Scorpiod (cincinnus).
(a) Helicoid: Axis develops on only one side and forms a coil structure atleast at the earlier development stage, eg. Hamelia, potato
(b) Scorpiod: Axis develops on alternate sides and often becomes a coil structure, eg. Heliotrvpium.
(iii) .simple dichasium (Biparous) a central axis ends in a terminal flower, further growth is produced by tw o lateral buds. Each cymose unit consists of three flow ers of which central one is old one. This is true cyme. eg. Jasminum.
(iv) ompound dichasium it has many flowers. A terminal old flower develops lateral simple dichasial cymes on both sides. Each compound dichasium consists of seven flowers eg. Clervdendron. A small,simple dichasium is called cymule.
(v} Polychasial ( yme (multiparousi The central axis ends with a flower. The lateral axes branches repeatedly, eg. Nerium.
Sytnpodial ( yme ip monochasial cyme, successive axes at first develop in a zigzag manner and later it develops into a straight pseudo axis. eg. Solanum americanum