Nature and development of plants . B Fig. 296. Structure of dicotyledonous seeds: A, nearly mature seed ofLepidium. The embryo consists of the hypocotyl, hy, ending below in theroot, r, and the root cap and above in the epicotyl or plumule, pi. Twocotyledons, c, arise laterally from the stem; /, funiculus; mi, micropyle; in,integuments; en, remains of endosperm. B, section of seed of water lily—c, embryo with two cotyledons attached laterally to the minute stem ofthe embryo and surrounded by a layer of endosperm cells; mg, sporangialcells or perisperm; i, integument. of the receptacle, forming
Nature and development of plants . B Fig. 296. Structure of dicotyledonous seeds: A, nearly mature seed ofLepidium. The embryo consists of the hypocotyl, hy, ending below in theroot, r, and the root cap and above in the epicotyl or plumule, pi. Twocotyledons, c, arise laterally from the stem; /, funiculus; mi, micropyle; in,integuments; en, remains of endosperm. B, section of seed of water lily—c, embryo with two cotyledons attached laterally to the minute stem ofthe embryo and surrounded by a layer of endosperm cells; mg, sporangialcells or perisperm; i, integument. of the receptacle, forming the perigynous type of flower, and theadhesion of the receptacle to the ovary so that the perianth andstamens apparently arise from the top of the ovary, epigynoustype of flower (page 353). The irregularity that characterizesthe highest types of flowers in many of the orders is the mosthelpful of all these variations, as is indicated by the abundanceand more common occurrence of such forms. The most characteristic feature of th
Size: 1487px × 1679px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectplants
