XIV.—MEIOSIS IN RUMEX PULCHER L

Microsporogenesis in Buginvillaea glabra

“…XXV, figs. The projections of the mother cell wall are not thin like the callose walls found by Castetter (1925Castetter ( , 1926 in Melilotus alba and Cucurbita maxima, but are broadly pointed, more like those described by Farr (1916) in Nicotiana and by Shimamura (1929) in Rumex. 46).…”

“…The cytoplasmic constrictions progress inward along the vacuolated regions between the nuclei (PI. It is probable that the material which makes up these projections may have been deposited by the constricting cytoplasm, as described by Gates (1924) in Lathraea and by Shimamura (1929) in Rumex. 43-45) until finally the furrows meet at the center of the cell and cut the tetrad into four microspores ( fig.…”

MICROSPOROGENESIS IN BUGINVILLAEA GLABRA

“…44). It is probable that the material which makes up these projections may have been deposited by the constricting cytoplasm, as described by Gates (1924) in Lathraea and by Shimamura (1929) in Rumex. The projections of the mother cell wall are not thin like the callose walls found by Castetter (1925Castetter ( , 1926 in Melilotus alba and Cucurbita maxima, but are broadly pointed, more like those described by Farr (1916) in Nicotiana and by Shimamura (1929) in Rumex.…”

“…It is probable that the material which makes up these projections may have been deposited by the constricting cytoplasm, as described by Gates (1924) in Lathraea and by Shimamura (1929) in Rumex. The projections of the mother cell wall are not thin like the callose walls found by Castetter (1925Castetter ( , 1926 in Melilotus alba and Cucurbita maxima, but are broadly pointed, more like those described by Farr (1916) in Nicotiana and by Shimamura (1929) in Rumex. My observations agree with those of Bolenbaugh (1928), who found that in Tropaeolum majus, during the process of furrowing, the nuclei move away from the plasma membrane, and that, by the time the cytoplasm is cut into four separate masses, a nucleus occupies a central position in each of the developing microspores.…”