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Ch.21 Nonvascular Plants: Mosses, Liverworts, and Hornworts, Cross…
Ch.21 Nonvascular Plants: Mosses, Liverworts, and Hornworts
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Cross Connection: Leafy liverworts such as Lopocolea can be very easily confused with mosses. Their distinguishing features are their typically lobed leaves, which grow from two apical points, and their basal pouch. Moss leaves are never like this.
Cross Connection: Thallose liverworts have rather thick bodies and are not easily confused with mosses. The Oxymitra incrassata has papery scales and white dots which are air pores; clefts contain gametangia. When young, the gametophyte had one apical meristem and one cleft, then the apex divided dichotomously.
Cross Connection: Although most moss stems do not have vascular tissues, they do support the shoot and most have a layer or two of thick-walled cells. Sugars and minerals must be transported from leaves to the shoot apex, gametangia, and sporophytes; therefore, living parenchyma cells are necessary.
