13 



PLATE VIL 



THE FLOWERING PLANT. 



DIAGEAM I. Showing— 



Eeceptacle or Thalamus to which the Flokal Leaves are attached. 



/'Calyx, hypogynons or inferior (Gr. Jaqm, uuder; gHne, the female 

 j organ). 



\ Corolla, hypogynous or inferior. 

 I Stamens, hypogynous. 

 ^ Ovary, superior or free, containing an erect ovule. 



Insertions of Floral 

 Leaves . . . . 



DIAGEAM II. Showing— 



( Stigma, for receiving pollen. 

 Pistil or Gyncecium . . <. Style. 



t Ovary, containing one ovule. 

 Impregnation of Ovule Pollen-grains attached to stigma and throwing out pollen-tubes, 



which make their way down the style, enter the micropyle of 

 the ovule, and fertilize the germ-cell in tlie embryo-sac. 



DIAGEAM IIL Showing - 



rPrimine or outer coat (L. pi-imtis, first), formed after inner coat. 



Ovulf, < Secundine or inner coat (L. secumhis, second). 



( Nucleus, with a giant cell — the embryo-sac. 

 C Wall of sac. 

 Embryo-sac fertilized < Embryo. 



( Endosperm. 

 Fig. 1. Showing the Eipe Pistil op Pea — 



Pericarp — Eipe wall of ovary, dry and splitting into two valves. 

 Seed — Eipe ovule. 

 Fig. 2. Showing Seeds — 



{Testa or seed-skins (L. festa, a shell). 

 Endosperm,the so-called albumen (Gr. endon, within; iiperma,ii.seed) 

 Embryo, with two cotyle'dons, or seed-leaves. 

 o ( Testa. 



,^ '„ . o, , "\ Endosperm absorbed into embryo. 



(Exalbummous Seed) It-, ■. , , j. i / 1 



^ ' I, Embryo, with two cotyle dons. 



3. Pea (Exalbuminous Seed). 



4 and 5. Bean I t- j' t. i j 



,„ ,, . „ ,, ^ Endosperm absorbed. 



(Exalbummous Seed) i t- , ■,, , , , , 



^ ' v Embryo, with two cotyledons. 



C Cotyledons. 



Embryo -| Plumule. 



(. Eadicle. 

 Fig. 3. Anther of Tulip, showing iibro-vasculai' bundle in centre corresponding to the midrib of the leaf. 



Eight anther-lobe with two pollen-sacs. Left anther-lobe with two poUen-sacs. 

 DIAGEAM IV. Formation of Pollen-grains by Endogenous Division. 

 Fig. 4. Young Bean Plant, showing — 

 Avis ^ Tap-root. 



( Stem with terminal bud. 

 I Eootlets. 

 Appendages -j 2 Cotyledons. 

 (. Foliage leaves. 



