LECT. IX.] HYBERNACULA CA.ULINAR BULBS. 455 



preaches the bulb, it divides into three fasciculi, 

 one of which enters the upper scale c. where it 

 splits to form the seven fasciculi that run through 

 it, as has been already demonstrated ; another 

 passes into the keel scale d. and the third subdi- 

 vides to supply the interior scales and the em- 

 bryon. The conducting vessels are all simple 

 spirals; but I have not been able to determine the 

 character of the returning vessels. When the bulb 

 is perfected it separates from the stem, as has been 

 already mentioned, in the same manner as ripe 

 fruit falls, the umbilical vessels dividing at the 

 point of attachment. 



Caulinar bulbs when planted produce leaves 

 only, like those formed on the separated scales, 

 or raised from the seeds of the Lily; and like 

 these, also, they exhibit all the peculiarities and 

 diseases of the parent. 



From the analogy which we recognise between 

 the sexual progeny of animals, and the seminal 

 progeny of vegetables, we are accustomed to re- 

 gard the distinct vitality of seeds and their reten- 

 tion of 1 life as a matter of course; and even per- 

 suade ourselves that we comprehend the manner 

 in which the principle of vitality is conveyed to 

 the embryon ; but, although bulbs resemble seeds 

 in many respects, yet as they are not the result of 

 the sexual functions, we find much difficulty in 

 comprehending how they acquire and maintain 



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