Scarlet Orb

by Sonali Gangane

Title

Scarlet Orb

Artist

Sonali Gangane

Medium

Photograph - Photograph

Description

An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified. The modifications can involve the length and the nature of the internodes and the phyllotaxis, as well as variations in the proportions, compressions, swellings, adnations, connations and reduction of main and secondary axes. Inflorescence can also be defined as the reproductive portion of a plant that bears a cluster of flowers in a specific pattern.The stem holding the whole inflorescence is called a peduncle and the main stem holding the flowers or more branches within the inflorescence is called the rachis. The stalk of each single flower is called a pedicel.
The fruiting stage of an inflorescence is known as an infructescence.A flower that is not part of an inflorescence is called a solitary flower and its stalk is also referred to as a peduncle.
Simple inflorescences
Inflorescence of sessile disc florets forming the capitulum
Indeterminate:
Indeterminate simple inflorescences are generally called racemose pron.: /ˈræsɨmoʊs/. The main kind of racemose inflorescence is the raceme (/ˈræsiːm/, from classical Latin racemus, cluster of grapes).[2] The other kind of racemose inflorescences can all be derived from this one by dilation, compression, swelling or reduction of the different axes. Some passage forms between the obvious ones are commonly admitted.
A raceme is an unbranched, indeterminate inflorescence with pedicellate (having short floral stalks) flowers along the axis.
A spike is a type of raceme with flowers that do not have a pedicel.
A racemose corymb is an unbranched, indeterminate inflorescence that is flat-topped or convex due to their outer pedicels which are progressively longer than inner ones.
An umbel is a type of raceme with a short axis and multiple floral pedicels of equal length that appear to arise from a common point.
A spadix is a spike of flowers densely arranged around it, enclosed or accompanied by a highly specialised bract called a spathe. It is characteristic of the Araceae family.
A flower head or capitulum is a very contracted raceme in which the single sessile flowers share are borne on an enlarged stem. It is characteristic of Dipsacaceae.
A catkin or ament is a scaly, generally drooping spike or raceme. Cymose or other complex inflorescences that are superficially similar are also generally called thus.
Determinate:Determinate simple inflorescences are generally called cymose. The main kind of cymose inflorescence is the cyme (pronounced 'saim', from the French cime in the sense ‘top, summit’). Cymes are further divided according to this scheme:
Only one secondary axis: monochasium Secondary buds always develop on the same side of the stem: helicoid cyme or bostryx The successive pedicels are aligned on the same plane: drepanium
Secondary buds develop alternately on the stem : scorpioid cyme The successive pedicels are arranged in a sort of spiral: cincinnus (characteristic of the Boraginaceae and Commelinaceae)
The successive pedicels follow a zig-zag path on the same plane: rhipidium (many Iridaceae)
Two secondary axes: dichasial cyme Secondary axis still dichasial: dichasium (characteristic of Caryophyllaceae)
Secondary axis monochasia: double scorpioid cyme or double helicoid cyme
More than two secondary axes: pleiochasium
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Thanks for viewing.2013©Sonali T. Gangane

Uploaded

February 17th, 2013

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