---------------------------------------------------------------------- GAMETOPHYTE. (Prominent part of the plant. Leads an independent existence.) -------------+--------------+---------------+------------------------- | Vegetative | Vegetative | Sexual Organs. | Stage. |Multiplication.| -------------+--------------+---------------+------------------------- Riccia. |Thallus |Sometimes by |Immersed by surrounding, |flattened, |branching and |upward growth of thallus. |ribbon-like, |dying away of +--------------+---------- |forked, |older parts. |Antheridia, |Archegonia, |or nearly | |with |with egg |circular. | |spermatozoids.|in each. -------------+--------------+---------------+------------------------- Marchantia. |Thallus |By dying away | Borne on special |flattened, |of older parts,| receptacles on |ribbon-like, |and by gemmæ. | different plants. |forked, | +--------------+---------- |male and | |Antheridia, |Archegonia, |female | |with |borne on |plants bear | |spermatozoids |female |gametophores. | |borne on |gametophore | | |antheridio- | (or | | | phores, |archegonio- | | |or male | phore), | | |gametophores. |each with | | | |an egg. -------------+--------------+---------------+------------------------- Jungermannia |A plant with |By dying away | On different plants. (or |apparent |of older parts.+--------------+---------- Cephalozia,|leaves and | |Antheridia, |Archegonia, Porella |stem; margins | |with |each with etc.) |of thallus | |spermatozoids,|egg, on |have become | |in axils of |female |cut into | |leaves of |plant. |lobes. Male | |male plant. | |and female | | | |plants. | | | | | | | | | | | -------------+--------------+---------------+--------------+---------- Mosses. |Plant with |By branching, | On different plants. {Mnium, |apparent |by growth of +--------------+----------