Bryophytes213-page7

Bryophytes213-page7 - to attach to the substrate are...

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Bryophytes - 7 Hepatophyta (Liverworts) Main Recognition Features Dorsal-ventral bilateral symmetry Sporangium simple Rhizoids single-celled “Leaves” lack a costa (in leafy liverworts) or have a thallus shape (thallose liverworts) Liverworts are divided into two groups based on their gametophyte morphology. The thallose liverworts have a prostrate, flattened shape with dichotomously branching lobes. The leafy liverworts have “leaves” along an axis. Thallose liverworts may have a cuticle and air pores on their upper surface. Rhizoids, used
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Unformatted text preview: to attach to the substrate are unicellular. Liverworts are generally heterothallic, producing separate male and female gametophytes. The gametophyte generation is predominant. The liverwort sporangium is a simple club-shaped structure. Thallose Liverworts The thallose liverworts have a lobed sheet-like shape, the thallus that has strong dorsalventral flattening. The thallus is about 30 cells thick. The apical meristem is often located in a notch in lobes and growth branches dichotomously. Life History and Reproduction...
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