DIY History | Transcribe | Scholarship at Iowa | A brief description of nine species of Hepaticae found in the vicinity of Iowa City by Mary F. Linder, 1886 | A brief description of nine species of Hepaticae found in the vicinity of Iowa City by Mary F. Linder, 1886, Page 42

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A brief description of nine species of Hepaticae found in the vicinity of Iowa City by Mary F. Linder, 1886

A brief description of nine species of Hepaticae found in the vicinity of Iowa City by Mary F. Linder, 1886, Page 42

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[page]40.[/page] the layer, air cavities in which onferra like cells grow up, are found, and, over these again arches the epidermis with a single stoma to each air cavity. The costae which bound the epidermal area are deeper, and the areas are larger than those of M. polymorpha. Each stoma is a simple round opening at the apex of a conical elevation of the epidermal layer of cells, at the center of each epidermal area. This may be seen in a surface section. Just beneath each stoma and surrounded on all sides by the conferra-like cells, is a small patch of slender cells which are colorless or nearly so. In some cases, however, the air chambers are almost completely filled with-