Text-book of structural and physiological botany . set ofleaves, among which a bud appears which grows into a newChara,—Ed.] Class V. Hepaiicce. The Hepaticae or Liverworts are elegant delicate plants,usually of a bright green colour, which form a beautifultransition from the Thallogens to the Ac-rogens. Many of them, as Anthoceros (), are true Thallogens having no leaves,and are included in the class only on accountof their mode of reproduction. Some bear agreat external resemblance to certain Lichens ;and in others the true leaves are only repre-sented by scales. These forms, the Thal
Text-book of structural and physiological botany . set ofleaves, among which a bud appears which grows into a newChara,—Ed.] Class V. Hepaiicce. The Hepaticae or Liverworts are elegant delicate plants,usually of a bright green colour, which form a beautifultransition from the Thallogens to the Ac-rogens. Many of them, as Anthoceros (), are true Thallogens having no leaves,and are included in the class only on accountof their mode of reproduction. Some bear agreat external resemblance to certain Lichens ;and in others the true leaves are only repre-sented by scales. These forms, the Thalloidor Frondose Hepaticce (Fig. 422), are con-trasted with the Foliose forms ; but even inthese latter the leaves never have even amid-rib, even when the stem contains vas-cular bundles of low organisation in the formof cambium-strings. Usually, especially inJungeri7iannia (Fig. 423), the leaves stand intwo rows, running in right- or left-handedspirals. In some genera with stems creepingon the earth or on the bark of trees, besides these larger. Fig. 421.—Antho-ceros IcBvis; a aburst sporogonium, special Morphology and Classijicatiojt. 297 leaves, which are all on the upper side, there is a third rowof smaller leaves (Figs. 424 11., 425), the awphigastria,adpressed to the under side of the stem. The Hepaticae
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyorkjwileysons
