LECT. IX.] HYBERNACULA GEMS. 46 1 



leaves, as in the case of adventitious buds, already 

 treated of; they are also situated on roots, and on 

 tubers; but in these cases they are usually deno- 

 minated eyes, oculi. Annual plants are supposed 

 not to be furnished with gems; but although they 

 are devoid of covered gems, yet their lateral shoots 

 proceed from naked buds, which immediately 

 spread into foliage. 



The relative position of axillary gfcms is ne- 

 cessarily regulated by that of the leaf; and there- 

 fore we find them, 1. opposite, or placed exactly on 

 the same line on opposite sides of the stem or the 

 branch; 2. alternate, or placed alternately, al- 

 though on opposite sides; and 3. spiral, that is, 

 placed round the stem or the branch in such a 

 manner, that a cord wound in a spiral manner round 

 it would touch each gem. They are said to be 

 simple or solitary, when one gem only is seen in the 

 axilla of each leaf, as in the greater number of in- 

 stances ; and aggregate, when, as in some plants, 

 two, three, and even more, are protruded at the 

 same time: thus we find two on the common 

 Elder, Sambucus nigra, three on broad-leaved 

 Birth-wort, Aristolochia sipho, and on Blue-ber- 

 ried Honeysuckle, Lonicera ccerulea, and many 

 on common Toothach tree, Zanthoxylum fraxi- 

 neum ; but as these are natives of cold countries, 

 it is supposed that the intention of Nature in this 

 double and triple supply is to secure the plants 



