Ovules in female cone, Thuja

Ovules in female cone, Thuja

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Credit: SINCLAIR STAMMERS/SCIENCE PHOTO LIBRARY

Caption: Thuja ovules. Coloured light micrograph (LM) of a transverse section through a female cone of a thuja tree, Thuja sp. , revealing two ovules. If the ovules (red) are fertilized by pollen produced by male cones they grow to form seeds. Thuja sp. belongs to a group of plants called gymnosperms, meaning 'naked seeds', that produce their ovules under scales on the outside of the female cone. The exposed ovules are accessible to wind-borne pollen, which falls between the covering of cone's scales. Differential interference contrast. Magnification: x67 at 7x5cm size. Magnification; x92 at 6x9cm size.

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Keywords: botany, cone, gymnosperm, gymnosperms, light micrograph, nature, ovule, plant, reproduction, thuja, thuja sp., type

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