Thelocactus macdowellii
Light microscope micrograph of Thelocactus macdowellii pollen. Pollen grains are spheroidal and 12-colpate (having twelve apertures).
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							Thelocactus macdowellii | 
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Light microscope micrograph of Thelocactus macdowellii pollen. Pollen grains are spheroidal and 12-colpate (having twelve apertures).
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							Thelocactus macdowellii | 
 |