. Fossil plants : for students of botany and geology . Paleobotany. VIIl] DETERMINATION OF LIVERWORTS. 231 body. Such genera as Pellia, Marchantia, Lunularia, Reboulia, and others bear a striking resemblance to Fucus, Chondrus and many other algae. Imperf'ecb specimens of certain Lichens, not to mention some of the Polyzoa, might easily be mistaken for Liverworts. Among the higher plants, there are some forms of the Podo- stemaceae which simulate in habit both thalloid and foliose' Liverworts as well as Mosses ^ The members of this Dicoty- ledonous family are described as water-plants with a M
. Fossil plants : for students of botany and geology . Paleobotany. VIIl] DETERMINATION OF LIVERWORTS. 231 body. Such genera as Pellia, Marchantia, Lunularia, Reboulia, and others bear a striking resemblance to Fucus, Chondrus and many other algae. Imperf'ecb specimens of certain Lichens, not to mention some of the Polyzoa, might easily be mistaken for Liverworts. Among the higher plants, there are some forms of the Podo- stemaceae which simulate in habit both thalloid and foliose' Liverworts as well as Mosses ^ The members of this Dicoty- ledonous family are described as water-plants with a Moss- or Liverwort-like form; they occur on rocks in quickly-flowing water in the tropics. In one instance a recent Podostemaceous genus has been described as a member of the Anthocerotales; the genus Blandowia', referred to by Willdenow as a Liverwort, has since been recognised as one of the Podostemaceae. The resemblance between some of the foliose Hepaticae and genera of Mosses is often very close. In certain Mosses, such as Hookeria pennata', the large two-ranked leaves suggest the branches of a Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press
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