Lectures on the physiology of plants . - embryo-plant to. FI( -. 4:,. - J Iv. Upper fiffuie, Microbpore sp »ith ij<.ljtinous en- velope si, and ap icil p-ipilla protrudinc into th, ; funnel. In the papilla is a flattened yellow drop ; S£r ri aptured wall of macro- sporangium (X about 30). Lower figure,ruptured microspore after the escape ofthe antherozoids: ex epispore ; dl extrudedendospore, containing granules ; r z spiralantherozoids; yy their vesicles, contain-ing starchy granules. The gelatinous en-velope of the microspore has protuberances on the exospore arcwrongly re
Lectures on the physiology of plants . - embryo-plant to. FI( -. 4:,. - J Iv. Upper fiffuie, Microbpore sp »ith ij<.ljtinous en- velope si, and ap icil p-ipilla protrudinc into th, ; funnel. In the papilla is a flattened yellow drop ; S£r ri aptured wall of macro- sporangium (X about 30). Lower figure,ruptured microspore after the escape ofthe antherozoids: ex epispore ; dl extrudedendospore, containing granules ; r z spiralantherozoids; yy their vesicles, contain-ing starchy granules. The gelatinous en-velope of the microspore has protuberances on the exospore arcwrongly represented (X 550). 748 LECTURE XL 11. obtain a fixed position in order that it may maintain a definite direction withrespect to the external world. Finally, it should be remarked that in Fig. 432also the gelatinous mass referred to {s I) is still to be seen, enveloping the wholegerminating apparatus. ^^hen at length the whole of the store of nutritive material in the macrospore isexhausted, and the young plant has produced several root
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectplantph, bookyear1887
