Transactions of the Royal Society of New Zealand . rmal cells dividing periclinally(see fig. 4, e).12—Trans. 354 Transactions. Stomata.—Stomata are numerous on the ventral surface, but absenton the dorsal. Development, as far as I have made out, takes place inthe usual way, and the first stomata are formed about the 4th leaf fromthe apex. The guard-cells are long, and are comparatively narrow. Theirwalls are thick, and at the top and bottom the thickened portion of thewall bounding the pore projects in the form of a ridge. Midway betweenthese ridges the walls are not thickened, and when turgid
Transactions of the Royal Society of New Zealand . rmal cells dividing periclinally(see fig. 4, e).12—Trans. 354 Transactions. Stomata.—Stomata are numerous on the ventral surface, but absenton the dorsal. Development, as far as I have made out, takes place inthe usual way, and the first stomata are formed about the 4th leaf fromthe apex. The guard-cells are long, and are comparatively narrow. Theirwalls are thick, and at the top and bottom the thickened portion of thewall bounding the pore projects in the form of a ridge. Midway betweenthese ridges the walls are not thickened, and when turgid jut out into thepore, and thus facilitate its closing. The guard-cells are half the epidermalcells in height, and are sunk beneath the epidermis, the inner walls beingin the same plane as the inner walls of the epidermal cells. Warming (2) and Miss Cross (7) describe stomata as not being found that they were sunk in every case, except in the cotyledons, whichare not referred to bv either of these writers. Stoma -? Respiratory cavity.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscience, bookyear1911
