BRACTE/E. 21 



of the simple leaves of the plant on which they are 

 found, as on Cinchona ; and in their connected one, 

 rudiments of the leaflets of the compound leaves of the 

 plant, as on Rosa. 



117. An ochrea is a solitary stipula, whose edges are 

 united together so as to form a sheath around the part 

 near which it is developed, as in Polygonum. 



118. Stipulse are not common on monocotyledonous or 

 endogenous plants. 



119. Er actea is a term rather inconclusive as to 

 what it comprehends within its meaning ; but, as a ge- 

 neral rule, all foliaceous expansions placed between the 

 common leaves and true external floral envelope, are 

 bractece. 



120. Sometimes many bractese are developed very 

 close together, becoming imbricated one upon the other, 

 and are placed immediately beneath the flowers, as in 

 the common Daisy ; this constitutes an involucrum. At 

 other times they become consolidated together, forming 

 a cupula, as in the Oak. 



121. Other forms, deemed bractese by some, will be 

 found amongst the floral envelopes. 



122. There are certain little bodies called buds which 

 vary in their nature, and appear upon different parts of 

 the divisions of the stem; some being placed in the 

 axillae of leaves, and others upon the leaves themselves ; 

 some giving rise to new branches, others to leaves. In 

 true leaf buds the young leaves are rolled up in various 

 manners ; in the Apple they are involute, in the Rose- 

 mary, revolute ; in the Wall flower, convolute, and plaited 

 in the Palms. 



123. Tendrils and spines are other appendages often 

 met with on plants. 



124. Tendrils are filiform bodies, which are mostly to 

 be met with on plants having feeble or climbing stems, 

 and by their twining spirally around contiguous objects 

 tend to support the otherwise falling plant ; they are 

 abortive states of different parts of the axis, their situa- 

 tion on the plant showing what they are abortions of. 



