What is Syngenesious condition of stamen?
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Syngenesious conditions are seen in Asteraceae. In this condition, the stamens are united by their anthers only (filaments free). These fused anthers form a ring around the gynoecium.
What is Syngenesious in botany?
Definition of syngenesious : united by the anthers syngenesious stamens : having stamens so united.
Where do you get Syngenesious stamen?
Syngenesious condition of stamens is present in Helianthus (sunflower). Synandrous and monadelphous „ conditions occur respectively in Cucurbita and Hibiscus. In Calotropis, a different structure called gynostegium is present, which is formed by the • fusion of anther with the stigma.
Which family is famous for Synandrous condition of stamens?
Synandrous is the fusion of stamens in which stamens are united through out their whole length, . e.g., members of family- Cucurbitaceae.
What is Syngenesious condition give an example?
Syngenesious condition is an arrangement of stamens where their anthers are fused while their filaments are free. The fused anthers form a circle around the gynoecium. It is seen in the Compositae or Asteraceae family. E.g. Tagetes (Marigold), Helianthus (Sunflower).
What is Syngenesious anther?
Syngenesious stamen are those stamens whose anthers are united together into a tube and its filaments are free. In syngenesious plants, the anthers shed their pollen inward and the style pushes them through the anthers like a piston and shoves them upto present it on top of anthers.
What is Didynamous condition?
When four stamens in a flower are present, out of them two are long and two are short, then it is called didynamous condition. Didynamous condition is related to androecium. The stamens in a flower are known as the androecium.
In which plant pollinia is present?
A pollinium (plural pollinia) is a coherent mass of pollen grains in a plant that are the product of only one anther, but are transferred, during pollination, as a single unit. This is regularly seen in plants such as orchids and many species of milkweeds (Asclepiadoideae).
What is Synandrous condition give an example?
The cucurbits like gourd, bitter-gourd show synandrous condition of the androecium in which the stamens are fused in their entire length of filaments and the anthers. This is opposite to the polyandrous condition, in which the stamens are completely free, as seen in Ranunculus. Hence, the correct answer is ‘Gourd’
Where does monadelphous stamens are found?
Common feature found in China rose, tomato and lemon: a) Monadelphous stamens.
Is Hibiscus a monadelphous?
So, the correct answer is ‘Hibiscus’
What is Obdiplostemonous condition?
Definition of obdiplostemonous : having the stamens in two whorls with those of the outer whorl opposite the petals — compare diplostemonous.