Elementary botany . Frj. of riccia, showing neck,venter, and the egg; archegonium is partlysurrounded by the tissue of the thallus.(Riccia crystallina.) Fig. embryo (sporogoni-um) of riccia, within the venterof the archegonium ; the latterhas now two layers of cells.(Riccia crystallina.; The egg, on the other hand, after acquiring a thin wall, swells up and fillsthe cavity of the venter. Then it divides by a cross wall into two two grow, and divide again, and so on until there is formed a quitelarge mass of cells rounded in form and still contained in the
Elementary botany . Frj. of riccia, showing neck,venter, and the egg; archegonium is partlysurrounded by the tissue of the thallus.(Riccia crystallina.) Fig. embryo (sporogoni-um) of riccia, within the venterof the archegonium ; the latterhas now two layers of cells.(Riccia crystallina.; The egg, on the other hand, after acquiring a thin wall, swells up and fillsthe cavity of the venter. Then it divides by a cross wall into two two grow, and divide again, and so on until there is formed a quitelarge mass of cells rounded in form and still contained in the venter of thearchegonium, which itself increases in size by the growth of the cells of thewall. 480. Sporogonium of riccia.—The fruit of riccia, which isdeveloped from the fertilized egg in the archegonium, forms arounded capsule still enclosed in the venter of the archegonium,which grows also to provide space for it. Therefore a sectionthrough the plant at this time, as described for the studyof the archegonium,
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Keywords: ., bookauthoratk, bookcentury1900, bookdecade1900, booksubjectbotany
