stomium


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stomium

(ˈstəʊmɪəm)
n
(Botany) the part of the sporangium of ferns that ruptures to release the spores
[C20: via New Latin from Greek stomion, diminutive of stoma mouth]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Between each theca there are two to four layers of thin stroma cells, which break down in the anthesis, forming the longitudinal stomium, an opening through which pollen grains are released (Figure 3f).
Morphoanatomy of the flower of Syagrus inajai (SPRUCE) Becc. (Arecaceae- Arecoideae- Attaleinae), Amazon/Morfoanatomia floral de Syagrus inajai (Spruce) Becc. (Arecaceae-Arecoideae-Attaleinae), Amazonia
At maturity, a cyperaceous stamen consists of a stretched filament and a basifixed, introrse anther with two thecae, each with a longitudinal stomium between the two pollen sacs.
A floral ontogenetic approach to questions of homology within the Cyperoideae (Cyperaceae)

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