13 



t PLATE VIL 



THE FLOWERING PLANT. 



DIAGRAM I. Showing 



RECEPTACLE OR THALAMUS TO WHICH THE FLORAL LEAVES ARE ATTACHED. 



/'Calyx, hypogynous or inferior (Gr. Jiupo, under; gune, the female 



INSERTIONS OF FLORAL 



\ Corolla, hypogynous or inferior. 



.LEAVES I . , 



I Stamens, hypogynous. 



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

 DIAGRAM II. Showing 



f Stigma, for receiving pollen. 

 PISTIL OR GYNOICIUM . . < Style. 



(. 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 the embryo-sac. 

 DIAGRAM III. Showing 



f Primine or outer coat (L. primus, first), formed after inner coat. 



OVULE < Secundine or inner coat (L. secundus, second). 



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

 C Wall of sac. 

 EMBRYO-SAC FERTILIZED -< Embryo. 



(. Endosperm. 

 FIG. 1. Showing the RIPE PISTIL OF PEA 



PERICARP Ripe wall of ovary, dry and splitting into two valves. 

 SEED Ripe ovule. 

 FIG. 2. Showing SEEDS 



f Testa or seed-skins (L. testa, a shell). 



A -< Endosperm, the so-called albumen (Gr. endon, within; sperma, a seed; 



(Albuminous Seed) (^ Embry0) with two cotyle ' donS) or see d-leaves. 



ALMOND f Testa. 



,. -< Endosperm absorbed into embryo. 

 (Exalbummous Seed) J -n , .., , . , ,, 



' v Embryo, with two eotyle dons. 



3. PEA (Exalbummous Seed). 



j K T, ( Testa, 



4 and 5. BEAN I . , . 



/T , ,, c, ,, { Endosperm absorbed. 



(Exalbummous Seed) j ,-, , ... ... 



' I, Embryo, witli two cotyledons. 



C Cotyledons. 



EMBRYO J Plumule. 



( Radick. 

 FIG. 3. ANTHER OF TULIP, showing libro-vascular bundle in centre corresponding to the midrib of the leaf. 



Right anther-lobe with two pollen-sacs. Left anther-lobe with two pollen-sacs. 

 DIAGRAM IV. FORMATION OF POLLEN-GRAINS BY ENDOGENOUS DIVISION. 

 FIG. 4. YOUNG BEAN PLANT, showing 



Axis j ' ap - r ot 



( Stem with terminal bud. 



I Rootlets. 



APPENDAGES J 2 Cotyledons. 

 V. Foliage leaves. 



