Photograph by Martin Oeggerli Snowball blossom ... - Wissenschaft und Deutsch
Photograph by Martin Oeggerli
Snowball blossom
Lodged in the rumpled tissue of a Viburnum tinus stigma, pollen grains from other snowball blossoms (gray) swell with moisture. One (at center) is already growing the tube that delivers sperm to the ovule. Other species’ pollen (yellow and green) has landed amiss; genetic defenses exclude them from the fertilization race.
www.micronaut.ch
source

Photograph by Martin Oeggerli

Snowball blossom

Lodged in the rumpled tissue of a Viburnum tinus stigma, pollen grains from other snowball blossoms (gray) swell with moisture. One (at center) is already growing the tube that delivers sperm to the ovule. Other species’ pollen (yellow and green) has landed amiss; genetic defenses exclude them from the fertilization race.

www.micronaut.ch

source

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