Page 1 : ey tne OY ly, , , , Cotyledon, , mw a, ledonous Seed Seed coat , ture of Dicoty, Struc z seed is the seed, , Plumule, , the C w\~< ; J, , ™ Ailum, , ® The outermost covering of, , coat. d, © Seed coat has 2 layers: Outer testa an, , inner tegmen. S nae, i d hilum c, ® On the seed coat, there 18 vail - 94; Structure of dicotyledonous seeq, through which the developin, attached to the fruit., , © Above the hilum is a small pore called the, , Radicle, eds are Fig. 3., , micropyle., , nas nal axis and t, , © Within the seed coat is the embryo, consisting of am embryo ay, cotyledons., , © Cotyledons are fleshy and full of reserve food materials., , At the two ends of the embryonal axis, the radicle and the plumule are present., , ©, , ot present in mature, , ® In plants such as bean, gram and pea, the endosperm isn, non-albuminous, , seeds and such seeds are called non-endospermous OF, seeds., , © In some seeds such as castor, the endosperm is formed due to double, fertilisation. It is a food storing tissue., , © Dicot seeds. e.g., Gram, pea, bean and castor., , Structure of Monocotyledonous Seed, , > Generally, monocot seeds are endospermic (albuminous) but some are nonendospermic. e.g., Orchids., , > In cereals like maize, the, , , , seed coat is membranous Send cnet it frattqyall Endosperm, and generally fused with ‘Mourone ate, the fruit wall. Scutellum, i Cok, The endosperm is bulky Podoonerta leoptile, and stores food. Plumule, ‘ Embryo, The outer covering of Radicle, Coleorhiza, , , , endosperm separates the, embryo by a protein layer Fig. 3.25; Structure of a monocotyledonous seed, called aleurone layer., , The embryo is small and situated in a groove at one end of the endosperm,, It consists of one large and shield shaped cotyledon known as scutellum and q, short axis with a plumule and a radicle., , , , ep, i sheath called ex, , & jumule is prot, g, ot seeds. e.g., Monoe, mi-Technical Des, se, , The plant is descr, then floral charac, , mhen a floral diag, py some symbols., , g, , pols are usec, —, Br, , K, , In floral form’, and adhesion by, , e.g., Floral f, A floral diagr, , number of parts, the relation they, , The positior, the flower is rer, floral diagram., , e.g., Floral