13 



PLATE VIL 



THE FLOWERING- PLANT. 



DIAGKAM I. Showing 



RECEPTACLE OR THALAMTTS TO WHICH THE FLORAL LKAVES ARE ATTACHED. 



/Calyx, hypogynons or inferior (Gr. liupo, under; gune, the female 



INSERTIONS OF FLORAL 



\ Corolla, hypogynous or interior. 



I Stamens, hypogynoua 



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

 DIAGKAM II. Showing 



( Stigma, for receiving pollen. 

 PISTIL OR GYNCECIUM . . < Style. 



V. 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 ot 

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

 DIAGKAM III. Showing - 



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

 OVULE ....... \ Secundine or inner coat (L. necumlut-; second). 



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

 ( Wall of sac. 

 EMBRYO-SAC FERTILIZED -j 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). 



-? Endosperm, the so called albumen (Gr. endon, within; xpernia, a seed; 

 (Albuminous Seed) ^ Embrvo> witll two cot yle'dons, or seed-leaves. 



( Testa. 



2. ALMOND \ , , , , . , 



.. < Endosperm absorbed into embryo. 

 (Exalbuminous Seed) J -p, , . , ,, 



' v Embryo, with two cotyle dons. 



3. PEA (Exalbuminous Seed). 



i E T> ( Testa. 



4 and 5. BEAN 



. EAN 



, ., . ,, , . < Endosperm absorbed. 

 (Exalbuminous Seed) j -.-, , .,, . , , , 



' v Embryo, witli two cotyledons. 



f Cotyledons. 

 EMBRYO ...... J Plumule. 



( Radicle. 

 FIG. 3. ANTHER OP TULIP, showing fibro-vaeculai- 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 op POLLEN-GRAINS BY ENDOGENOUS DIVISION. 

 FIG. 4. YOUNG BEAN PLANT, showing 

 AYIH ! Tap-root, 



( Stem with terminal bud. 

 i Rootlets. 



APPENDAGES -J 2 Cotyledons. 

 ( Foliage leaves. 



