pollen sac

Type 2) There is one valve opening to reveal two pollen sacs.

Each has four to twenty elongated pollen sacs attached to the lower surface at one end.

Anthers have two pollen sacs opening toward the outside, or from their side, and usually along their length.

The pollen sacs arranged mostly in two pairs above each other, all introrse.

Under each microsporophyll is one or several microsporangia (pollen sacs).

In Lauraceae, for example, the pollen sacs are spaced apart and open independently.

Both pollen sacs are separated by the stomium.

Each anther contains four pollen sacs, which contain the microsporocytes.

There are between 6 and 16 microsporophylls present with each containing with 3 or 4 pollen sacs.

Each theca contains two microsporangia, also known as pollen sacs.

Anthers are triangular and consist of four pollen sacs, two on each side, with a small sterile central connective.

The anthers have 2 or 4 pollen sacs (locules).

They develop within the microsporangia, or pollen sacs, of the anthers on the stamens.

Each anther lobe develops two pollen sacs.

The connective tissue between the anther's two pollen sacs extends outwards at its base to form spurs.

The stamens have anthers with two lobes (locules) and four pollen sacs.

Pollen sac may refer to:

The day-flying female is said to mimic a bee, complete with pollen sacs, and the male mimics a wasp.

Lower pollen sacs are latrorse.

If the pollen sacs are not adjacent, or if they open separately, then no thecae are formed.

Depending on the morphology of the flower, a pollen sac called a pollinia is attached to the head or abdomen of the male.

Type 3) One valve opens a wing of anther tissue towards the center of the flower revealing one pollen sac.

Anthers are with only one lobe and two pollen sacs (bilocular, like in Gomphrenoideae subfamily).

Pollination in this genus is accomplished in an unusual manner, as the pollen is grouped into pollen sacs.

The fertile sporogenous cells are surrounded by layers of sterile cells that grow into the wall of the pollen sac.