. Contributions from the Osborn Botanical Laboratory. Plants. CHILEAN SPECIES OF METZGERIA. 293 At the time of separation the gemmae are flat and unistratose struc- tures, orbicular to oblong in outline, broadening out abruptly from a two-celled and often indistinct stalk, and showing a broad and rounded apex with a single apical cell. They are mostly mm. long and mm. wide, being composed of six to eight indefinite rows of cells. On each side six to eight hairs are usually present, and these are commonly (but not invariably) arranged in pairs. The hairs extend almost at righ
. Contributions from the Osborn Botanical Laboratory. Plants. CHILEAN SPECIES OF METZGERIA. 293 At the time of separation the gemmae are flat and unistratose struc- tures, orbicular to oblong in outline, broadening out abruptly from a two-celled and often indistinct stalk, and showing a broad and rounded apex with a single apical cell. They are mostly mm. long and mm. wide, being composed of six to eight indefinite rows of cells. On each side six to eight hairs are usually present, and these are commonly (but not invariably) arranged in pairs. The hairs extend almost at right angles to the surface of the gemma and, when paired, spread in opposite directions. The majority are strongly. Fig. 5. Metzgeria patagonica Steph. A. Female branch, X 50. B. Germinating gemma, figures were both drawn from the type material. X 100. The curved and might often be described as hamate. Only the earliest stages of germination have been observed and in these the young plants have simply repeated the features of the gemmae, except that they have sometimes been a little narrower (Fig. 5, B). In other words they have remained flat and unistratose thalli, showing no signs of dorsiventrality and tending to produce a succession of paired and divergent marginal hairs. Marginal gemmae with hooked hairs have been described in Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Osborn Botanical Laboratory. [New Haven?] Osborn Botanical Laboratory, Yale University
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