1. Proper stamens 5, alternate with the petals, persistent; anthers introrse or subextrorse. ...
2. Stamens 6, inserted at the base of the divisions; filaments slender, anthers short, introrse.

What is the meaning of Introse?

introrse in American English

(ɪnˈtrɔrs ; ˈɪnˌtrɔrs ) adjective. Botany. facing inward, or toward the center. see also extrorse.

What is the meaning of Bicarpellary?

/ (ˌbaɪkɑːˈpɛlərɪ) / adjective. botany (of an ovary) having two carpels.

What is meant by Basifixed?

: attached at or near the base a basifixed anther — compare versatile sense 5b.

What is introrse stamen?

Introrse anthers. ... Used of anthers and the direction in which they open to release pollen. 1. (botany) Facing or turned inwards or towards an axis.

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What do you mean by Dithecous anther?

Hint: Dithecous anther is the anther that contains two anthers lobes which are connected to each other by a connective or a sterile band. Examples are angiosperms and crotalaria mustard, solanum. Microsporangia produces microspores.

What is Introse and Extrose?

Anthers which have their face towards the pheriphery of the flower is called Extrose anthers. While if the face of anther lies towards centre of the flower, it is known as Introse anther.

What is Dithecous?

Dithecous. (Science: botany) Having two thecae, cells, or compartments. Origin: Pref.

What is Dorsifixed anther?

Dorsifixed: When the anther is attached to the filament by its back.

What is the meaning of Axile Placentation?

1. axile placentation - ovules are borne at or around the center of a compound ovary on an axis formed from joined septa. placentation - arrangement of the ovules in the placenta and of the placentas in the ovary.

What is a Diadelphous?

: united by filaments into two fascicles —used of stamens.

What is the meaning of Bilocular?

Medical Definition of bilocular

: divided into two cells or compartments.

What is Monocarpellary gynoecium?

Monocarpellary: Gynoecium consisting of a single carpel, e.g., Leguminosae. Gynoecium in a Flower: Component # 3. Apocarpous: When carpels are free, e.g., Ranunculaceae.

What is Schizolysigenous?

schizolysigenous: a combination of schizogenous and. lysigenous development. At maturity, glands are made up of a sheath of flattened. cells, and secretory cells are completely degenerated.

What is versatile anther?

Versatile anther is anther whose attachment is near its middle. This enables them to swing freely. Anthers are the structure which is found at the end or filament of a flower's stamen. They are involved in the formation and release of pollen.

What is Monothecous and Dithecous anther?

Monothecous anthers have a single lobe with two pollen chambers in it. They are also called bisporangiate as they have two pollen chambers. ... Dithecous anthers have two lobes with two pollen chambers in each. As they have four pollen chambers they are also known as tetrasporangiate.

Is anther a male or female part?

The male parts of the flower are called the stamens and are made up of the anther at the top and the stalk or filament that supports the anther. The female elements are collectively called the pistil. The top of the pistil is called the stigma, which is a sticky surface receptive to pollen.

What is filament in flower?

filament. [ fĭl′ə-mənt ] A fine or slender thread, wire, or fiber. The part of a stamen that supports the anther of a flower; the stalk of a stamen.

What does Microsporogenesis mean?

[ mī′krə-spôr′ə-jĕn′ĭ-sĭs ] The formation of microspores inside the microsporangia (or pollen sacs) of seed plants. A diploid cell in the microsporangium, called a microsporocyte or a pollen mother cell, undergoes meiosis and gives rise to four haploid microspores.

What is a Gynobasic style and where does it occur?

Definition. Referring to a style arising from the base of the ovary. Gynobasic styles are of two types: 1) the style is inserted laterally at the base of a syncarpous ovary as in Chrysobalanaceae and Rhabdodendraceae 2) the style arises from the center of an apocarpous ovary as in many species of Lamiaceae.

What are Didynamous stamens?

: having four stamens disposed in pairs of unequal length —used especially of plants of the families Scrophulariaceae and Labiatae.

Which of the following takes part in dehiscence?

In the flowers, the male reproductive organ (anther) undergoes dehiscence and releases its contents. Anther consists of a fibrous layer called endothecium. This layer is hygroscopic in nature.

Why anther is Dithecous?

A typical angiosperm anther is bilobed with each lobe having two theca, thus they are called dithecous. ... The outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen.

Why is Bilobed anther Dithecous and Tetrasporangiate?

Anther is a bilobed and tetragonal structure. It is oblong and knoblike and is referred to as the fertile part of the stamen. It is dithecous because each anther lobe has two chambers or theca. ... Hence, we can say that a bilobed anther is tetrasporangiate.

Why are angiosperms called Dithecous?

Due to the presence of two thecae in a lobe, then the anthers of angiosperms are called dithecous. Microsporangia is the structure that is mainly responsible for the production and releases of pollen grains. The thecae acts as the microsporangium.