. Botanical gazette. Plants. 476 BOTANICAL GAZETTE [JUNE. Fig. I.—Cell of somewhat intermediate character sur- rounded by ordinary gameto- phyte cells; X210. {m, m', m"), of the nature of secondary prothallia, had also been produced from the tenninal gametophytic portion. The lamina of the leaf in some cases was wholly absent, the petiole being, however, well developed and resembling that of an ordinary leaf (fig. 16). From the ventral surface of each of the two large terminal gametophytic portions {b, c) numerous antheridia ia) had been formed. From the dorsal surface of one of the proth
. Botanical gazette. Plants. 476 BOTANICAL GAZETTE [JUNE. Fig. I.—Cell of somewhat intermediate character sur- rounded by ordinary gameto- phyte cells; X210. {m, m', m"), of the nature of secondary prothallia, had also been produced from the tenninal gametophytic portion. The lamina of the leaf in some cases was wholly absent, the petiole being, however, well developed and resembling that of an ordinary leaf (fig. 16). From the ventral surface of each of the two large terminal gametophytic portions {b, c) numerous antheridia ia) had been formed. From the dorsal surface of one of the prothallial portions {h) two small secondary pro- thallia {m, m) had begun their develop- ment. The vascular system, which was generally well developed in this portion of the embryo sporophyte, extended for some distance into the terminal gametophytic portion. Between the gametophytic and sporophytic portions the cells were of an intermediate character, as shown in fig. 2, w^hich is a highly magnified portion taken at t. From the petiole of the same sporophyte a prothallial portion (p) had been produced. This outgrowth bears no relation to the vascular system of the petiole. The much modified primary leaf just described was devel- oped in connection with a root and normal secondary leaves. A structure similar to the preceding one is represented by fig. 8. The petiole ap- peared to be well developed but both lamina and root were absent. The terminal portion was also distinctly gameto- phytic in nature and on both surfaces numerous antheridia {a) of different sizes and secondary prothalHa had been produced. An interesting form is represented by fig. 13, since the single large gametophytic portion has been produced in connection with. 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 Hanover, Ind. : J. M. Coulter
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