216 TRANSACTIONS AND PROCEEDINGS OF THE [Sess. LXiii. 



was very much contracted and wrinkled. This example, 

 no doubt, showed the normal development of the seedling. 

 A fourth seed was allowed to produce a cotyledon 

 ^ inch long, which was then broken off close to the 

 point of exit (Fig, 17 c), and the seed placed in a pot, 

 with the broken part in contact with the soil. Xo 

 visible change took place for at least four months. After 

 five months it was noticed that a very slight growth had 

 recommenced, the broken part being now warty ; and in 

 another month the broken part was } inch across (Fig. 

 18), and protruded at one point J- inch above the 

 surface of the seed. The seed itself was as firm and 

 fresh as ever. 



Explanation of figures iu Plate. (All the figures, with the exception of 

 Fig. 10, are of natural size.) 



1. Fertilised ovule, ov, on pedicel ; jj, faded perianth. 



2. Fully developed single-seeded fruit on pedicel. 



3. Germinating seed — A, hiluni ; ?•, radicle. 



4-. The same dissected — em, embryo ; en, endosperm. 



5. Another seed — c, point of exit of cotyledon (radicle) ; h, young 



bulb ; ])r, primary root. 

 G. Bulb of above at later stage — .v, split of cotyledonary sheath. 



7. Still later stage of the same — pr, primary root ; f,v, cotyledon- 



ary sh.eath. 



8. More advanced stage of the same — pt, petiole of cotyledon. 

 !). Bulb free from the seed— c*', sheath of cotyledon. 



10. Basal portion of sheath — ar, adventitious roots appearing as 



protuberances. 



11. Young bulb growing — cs, remains of cotyledonary sheath; 



ar, adventitious roots. 

 '['J. A third seed germinating — jjt, petiole of cotyledon. 

 ]."). Tlie same at a later stage. 

 1 1. Bulb of the same, later — pr, primary root. 

 ].o. The same, with leaf breaking through the cotyledon — /, leaf. 

 10. Seedling well advanced — pr, primary root; ar, adventitious 



root. 

 17. A fourth seed — c, broken part of cotyledou. 

 ] H. Tiio broken part of the cotyledon at a later stage. 

 19. Old plant—?;, neck; o, off.sets. 



