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

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
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
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

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 dorsal–ventral 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...
View Full Document

This note was uploaded on 01/08/2012 for the course BIO 213 taught by Professor Makina during the Fall '09 term at SUNY Stony Brook.

Ask a homework question - tutors are online