Poopy Seed Head is a photograph by Dr Keith Wheeler/science Photo Library which was uploaded on September 25th, 2019.
Poopy Seed Head
Thornapple seed. Light micrograph of a section through a poppy (Papaver sp.) seed head. The outer wall (pericarp) consists of an outer epidermis of... more
Title
Poopy Seed Head
Artist
Dr Keith Wheeler/science Photo Library
Medium
Photograph
Description
Thornapple seed. Light micrograph of a section through a poppy (Papaver sp.) seed head. The outer wall (pericarp) consists of an outer epidermis of thick-walled cells with scattered stomata, while the rest of the wall consists of parenchyma tissue (pink). The 13 fused chambers have incomplete radial walls or septa (blue, triangular). These septa are covered in placentas, each of which bears an ovule (round, red). These ovules are developing into seeds. The seeds have an outer testa (dark red), under which is the nutritive layer (endosperm, purple) and an inner embryo sac. Magnification: x5, when printed 10 centimetres wide.
Uploaded
September 25th, 2019
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