Organography of plants, especially of the archegoniatae and spermaphyta . Fig. q. Riella Clausonis. Upon one side of the axis is FiG. 10. I, Riella Battandieri. Upper part of seen the winding wing in which the antheridia are sunk. If plantlet in profile. At c^ a pit in the wing in whichthese are not developed the wing is more prominent. Uponthe a now emptied antheridiam sat. At 9 an arche-under side large scales containing chlorophyll (leaves) are gonium surrounded by an envelope, j, vegetativeseen, which are larger in the figure than the wing. Magnified. point. 11, scheme of Riella. ill, sche
Organography of plants, especially of the archegoniatae and spermaphyta . Fig. q. Riella Clausonis. Upon one side of the axis is FiG. 10. I, Riella Battandieri. Upper part of seen the winding wing in which the antheridia are sunk. If plantlet in profile. At c^ a pit in the wing in whichthese are not developed the wing is more prominent. Uponthe a now emptied antheridiam sat. At 9 an arche-under side large scales containing chlorophyll (leaves) are gonium surrounded by an envelope, j, vegetativeseen, which are larger in the figure than the wing. Magnified. point. 11, scheme of Riella. ill, scheme of one of the Marchantiaceae ; the thallus seen in transverse section. Magnified. vertically, but transversely or obliquely to the light falling upon it fromabove. We may find an explanation of the whole process of the formationof the wing in the fact that submerged water-plants are sensitive tolight of strong intensity, and in the case of small creeping forms, or evenof those growing erect in shallow water, injury from the light would Trabnt, Revision des especes d
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