A morphological study of some members of the genus Pallavicinia . ents; and similar mucilage secret-ing hairs are also found among the antheridia. Pallavicinia Levied Schiffner Pallavicinia Levieri, the third species considered here, is much less restricted in its distribution. It is quite common in the neighborhood of Tjibodas in Java, at an elevation of 1400-1500 metres, and material was collected at several points. It has been reported from several other sta- i8 GENUS PALLAVICIN1A tions in Java and Sumatra, and according to Stephani occurs also in thePacific Islands, Tahiti and Hawaii. It w
A morphological study of some members of the genus Pallavicinia . ents; and similar mucilage secret-ing hairs are also found among the antheridia. Pallavicinia Levied Schiffner Pallavicinia Levieri, the third species considered here, is much less restricted in its distribution. It is quite common in the neighborhood of Tjibodas in Java, at an elevation of 1400-1500 metres, and material was collected at several points. It has been reported from several other sta- i8 GENUS PALLAVICIN1A tions in Java and Sumatra, and according to Stephani occurs also in thePacific Islands, Tahiti and Hawaii. It will probably be found in otherparts of Polynesia. The plant (Fig. 9) is smaller than P. radiculosa, and there is muchmore difference in size between the male and female plants. Like P. radiculosa, the thallus is prostrate. It usually occurs on thetrunks of trees, among other liverworts and mosses, and does not formmasses of large size. The plants are very delicate in texture, and the maleplants are noticeably smaller than the females or the sterile plants. They. Fig. Male plant, x 8. Pallavicinia Levieri. B. Female plant, x 4. METHODS 19 measure only about 2 cm. in length and 4-5 mm. in width. The femaleplants (Fig. 9, B) are about 10 cm. in length and 7 mm. wide. The wings of the thallus are relatively very wide, and as usual butone cell thick. They are waved slightly on the margin, which is entireexcept for an occasional cell which projects slightly so as to form an incon-spicuous tooth. Anteriorly the lamina of the antheridial plant narrowsabruptly to the apex of the shoot, which is indented. The midrib projectsstrongly on the ventral side. The rhizoids are much less numerous thanin P. radiculosa, and quite different in color, being a rather light brown,instead of the deep purple-red found in P. radiculosa. The conductingstrand of the midrib is much like that of P. radiculosa. From the sides of the midrib in the male plant extend a series ofscales which form a more or l
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