Taxonomy of Angiosperm Racemose Cymose Main axis of unlimited growth Main axis of limited growth. Flowers arranged in an acropetal succession Flowers arranged in a basipetal succession Opening of flowers is centripetal Opening of flowers is centrifugal Usually the oldest flower at the base of the inflorescence axis. Usually the oldest flower at the top of the inflorescence axis. I.
Racemose The central axis of the inflorescence (peduncle) possesses terminal bud which is capable of growing continuously and produce lateral flowers is called Racemose inflorescence . Old flowers are at the base and younger flowers and buds are towards the apex. It is further divided into types based on growth pattern of main axis. T C E G O Q U G Ockp"Czku Gnqpicvgf Ockp"Czku Ujqtvgpgf Ockp"Czku" Hncvvgpgf"qt Inqdqug Ukorng"Tgegog Rcpkeng Urkmg Urkmgngv Urcfkz Ecvmkp Eqt{od Wodgn Jgcf Figure .
: Racemose . Main axis elongated The axis of inflorescence is elongated and contains pedicellate or sessile flowers on it. The following types are discussed under main axis elongated type. a.
Simple raceme: The inflorescence with an unbranched main axis bears pedicellate . . Types of Inflorescence Based On Position Have you ever noticed the inflorescence arising from different positions? Where is the inflorescence present in a plant?
Apex or axil? Based on position of inflorescences, it may be classified into three major types. They are, Terminal : Inflorescence grows as a part of the terminal shoot. Example: Raceme of Nerium oleander Axillary : Inflorescence presents in the axile of the nearest vegetative leaf.
Example: Hibiscus rosa-sinensis Cauliflorous : Inflorescence developed di rectly from a woody trunk. Example: Theobro- ma cocoa, Couraupita guinensis Observe the inflorescence of Jackfruit and Canon ball tree. Where does it arise? .
. Based on branching pattern and other characters Inflorescence may also be classified based on branching, number and arrangement of flowers, and some specialized structures. I. Indeterminate ( Racemose ) II.
Determinate (Cymose) III. Mixed inflorescence : Inflorescence of some plants show a combination of indeterminate and determinate pattern IV. Special inflorescence : Inflorescence which do not confine to