"Coleochaete " has a sterile jacket of cells that surround the gametangia and zygotes that are protected by a layer of sterile cells after fertilization.
2.
The phragmoplast can only be observed in Embryophytes, that is the bryophytes and vascular plants, and a few advanced green algae, specifically " Coleochaete " in the Division Charophyta.
3.
However, unlike land plants, " Coleochaete " has zygotic meiosis, meiosis taking place directly in the zygote and not in diploid cells resulting from mitotic division of the zygote.
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