LECT. X.] SITUATION OF LEAVES. 535 



flowers, they are termed floral (folia floralia), 

 Fig. 6. 



Elementary writers usually distinguish these 

 floral leaves, which are green and resemble the 

 other leaves of the plant, from those which are of 

 a different shape and colour, giving to the latter 

 the name of bractes (bractece), and place them 

 among those organs which I have yet to describe 

 under the term appendages. Both varieties, how- 

 ever, are real leaves, having the same anatomical 

 structure, and differing in shape not more from one 

 another, and from the other leaves of the plant, 

 than these last differ among themselves. That 

 colour is a bad cause of distinction is evident, for 

 many plants have all their leaves coloured; and 

 in purple-topped Clary, Salvia Horminum, and 

 .many other plants, the transition from common 

 leaves to green floral leaves (a. a. a. a. fig. 6), and 

 from these to coloured (b. b. b. fig. 6), is so gra- 

 dual as clearly to display their close affinity; and 

 to prove that all the three kinds are merely modifi- 

 cations of the same organ. The early Honeysuckle, 

 Lonicera Caprifolium; Green Hellebore, Helle- 

 borus viridis; and several of the Orchis tribe, af- 

 ford examples of green floral leaves: the Laven- 

 ders, Lavandulce ; crested Cow-wheat, Melampy- 

 rum cristatum ; Purple bracted Monarda, Monar- 

 da media, &c. display specimens of those that 

 are coloured ; and several of the Sages, Salvise, 



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