IN EXTRA-TROPICAL COUNTRIES. 51 



Boronia megastigma, Nees. 



In West Australia, on margins of swamps. This remarkable bush is 

 recorded here as an emblem of mourning, its external blackish 

 flowers rendering it especially eligible for graves. Industrially it 

 interests us on account of its powerfully fragrant blossoms, for the 

 sake of which this bush well deserves to be cultivated. The scent 

 might be extracted by Mr. Bosisto's process. 



Borrago offlcinalis, Linne. 



South Europe, Orient. An annual herb, occasionally used for 

 medicinal purposes or as an admixture to salad. 



Boswellia papyrifera, A. Richard. 



Morocco, Nubia and Abyssinia, forming entire forests about Bertat 

 on the Atlas. This tree exudes a kind of Olibanum resin, and 

 represents apparently one of the hardiest species of this and allied 

 genera. 



Boswellia thurifera, Colebrooke. 



India. A deciduous tree, living in arid forest regions. Yields an 

 aromatic resin. The real Olibanum is exuded by B. Carteri (Bird- 

 wood) of Arabia and tropical Africa. 



Boussingaultia basselloides, Humboldt. 



South America. This hardy climber is well fitted for bowers j the 

 mucilaginous tubers are edible. It is not uncommonly grown as a 

 climber on verandahs. 



Bouteloua barbata, Lagasca. 



North and Central America. One of the Gramma-grasses of the 

 prairies, called with some other species also Muskit-grass. Annual. 

 For nutritive value famed. 



Brabejum stellatifolium, Linne. 



South Africa. The nuts of this shrub are edible, resembling those 

 of our Macadamia ternifolia, to which also in foliage and flowers 

 barbejum is closely allied. The nuts are also similar to those of the 

 Chilian Guevina Avellana. The fruit should be roasted, as other- 

 wise it is deleterious. 



Brachychiton acerifolium, F. v. Mueller. 



The East Australian Flame-Tree. An evergreen shade-tree, with 

 magnificent trusses of crimson blossoms. Like B. populneum (R. 

 Br.), eligible for promenade lines when celerity of growth is no 

 object. The mucilaginous sap when exuded indurates to a kind of 

 tragacanth. 



