922 OF THE FULCRA; 



sometimes coloured. The Lime-trees, 

 T'tlia europcea, t. 610, and parvifolia^ 

 f% 170.5, have a very peculiar oblong pale 

 floral leaf, attached to the flower-stalk. 

 The Lavenders, see Cart. Mag. t. 400 

 and 401, have coloured bracteas, and the 

 Purple-topped Clary, Salvia Horminum 9 

 FL Gnec. t. 20, exhibits a gradation from 

 the proper leaves to green bracteas, and 

 from them to coloured ones, which last 

 are barren, or unaccompanied by flowers. 

 Hence I am induced to believe this plant 

 a mere variety of S. viridis, t. 1 9> all whose 

 bracteas are green and fertile. Bartsia 

 alpina, Engl. Bot> t. 361, and Melam- 

 pyrum arvense, t. 53, display an elegant 

 transition from leaves to coloured bracteas. 

 The Orchis tribe have green leafy bracteas, 

 different in size in different species. A 

 most beautiful large and coloured bractea 

 is produced in Mussamda frondosa, Hort. 

 Mai. v. 2. t. 18, from one of the teeth of 

 the calyx, also in M. glabra of Willdenow, 

 and two new species brought from Ame- 

 rica by Mr. John Fraser. Spinous bracteas 

 of a curious construction guard the calyx 



