Microsporangium — Free Biology Illustration

Biology

Microsporangium

A small compact microsporangium shown as an oval to slightly elongated pollen-producing sac with a smooth, thin but defined outer wall. The structure is pale yellow, tan, or yellow-brown and appears as a simple capsule-like chamber in cross-section or sectioned view. Its interior is enclosed by a rounded cavity densely packed with many tiny round developing microspores or pollen grains. It may be depicted as one of the small sacs attached to a reproductive leaf or as one of the four pollen sacs within an anther lobe, and is noticeably smaller than a megasporangium.

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