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gemma

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gemma

Unit of vegetative reproduction, consisting of a small group of undifferentiated green cells. Gemmae are found in certain mosses and liverworts, forming on the surface of the plant, often in cup-shaped structures, or gemmae cups. Gemmae are dispersed by splashes of rain and can then develop into new plants. In many species, gemmation is more common than reproduction by spores.



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It rolls away from its source with so inconsiderable a current, that it appears unlikely to escape being dried up by the hot season, but soon receiving an increase from the Gemma, the Keltu, the Bransu, and other less rivers, it is of such a breadth in the plain of Boad, which is not above three days' journey from its source, that a ball shot from a musket will scarce fly from one bank to the other.
A Voyage to Abyssinia by Lobo, Father View in context
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