Bryophytes213-page9

Bryophytes213-page9 - spring, when the sporophytes mature....

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Bryophytes - 9 Leafy Liverworts The leafy liverwort has delicate flattened overlapping pairs of “leaves” along an axis that branches frequently forming mats. The “leaves" are 2 or 3 ranked, lobed, one or two cells thick and lack a midrib, (called a costa in mosses) Leafy liverworts are usually mistaken for mosses. Once the eye is trained, they are more easily distinguished. Leafy liverworts are abundant epiphytes in the moist tropics and subtropics. They are not uncommon in the Pacific Northwest on bark. We just mistake them for mosses. They are not as hardy as mosses, and can best be found in the late
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Unformatted text preview: spring, when the sporophytes mature. Leafy Liverworts Epiphyte liverwort on leaf blade Life History and Reproduction Antheridia and archegonia are produced on short lateral branches on the liverwort axis. The sporophyte capsule, found on the surface of the gametophyte is "ephemeral". The translucent seta (sporophyte stalk) elongates rapidly to about one centimeter with a pinhead-sized sporangium (often black in color) at its tip. The spores are dispersed and the sporangium and seta rapidly degrade. Leafy Liverwort Sporangia...
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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.

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