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Development of the archegonium and embryo in lophocolea heterophylla



Development of the archegonium and embryo in lophocolea heterophylla



Bryologist 82(4): 576-582



Details of sporophyte development are lacking for many hepatics. These data remain unavailable for taxonomic and phylogenetic considerations. Development of the embryo in L. heterophylla (Schrad.) Dum. was investigated in live material and in serial sections of preserved material. The ontogeny of the archegonium was observed. The archegonium of L. heterophylla (Schrad.) Dum. develops in a manner similar to all Jungermanniales. Unique features are its stalk and the occurrence of paraphyses in the terminal cluster. In the Jungermanniopsida, there are 2 general trends in early embryo development. The hypobasal cell may give rise to the foot and haustorium or it may give rise to only the haustorium. The embryo of L. heterophylla follows the latter trend. This is in agreement with the majority of reports for members of the Jungermanniopsida.

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Accession: 005135741

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DOI: 10.2307/3241997


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