IN EXTRA-TROPICAL COUNTRIES. 39 



Astragalus Parnassi, Boissier. (A. Cylleneus, Heldreich.) 



Greece. This small shrub furnishes there almost exclusively the 

 commercial tragacanth. It ascends to elevations of 7,000 feet, 

 becomes therefore alpine. 



Astragalus strobiliferus, Royle. 



Asiatic Turkey. The brown tragacanth is collected from this 

 species. 



Astragalus venosus, Hochstetter. 



From Abyssinia to Central Africa. This perennial herb is sub- - 

 jected to regular cultivation for fodder known as "Hamat Kochata " 

 (Oliver). 



Astragalus verus, Olivier. 



Asiatic Turkey and Persia. This shrub furnishes the Takalor or 

 Smyrna Tragacanth, or it is derived from an allied species. 



Astrebla pectinata, F. v. Mueller.* (Dantlwnia pectinata, Lindley.) 

 New South Wales, Queensland, North and Central Australia, in 

 arid regions, always inland. A perennial desert-grass, resisting 

 drought, sought with avidity by sheep, and very fattening to them 

 and other pasture animals. 



Astrebla triticoides, F. v. Mueller.* (Dantlwnia triticoides, Lindley.) 



The Mitchell-Grass. Of nearly the same natural distribution as 

 the preceding, and equalling that species in value. Both so 

 important as to deserve artificial rearing even in their native country. 



Atalantia glauca, J. Hooker. 



New South Wales and Queensland. This Desert-Lemon is men- 

 tioned here to draw attention to the likelihood of its improving in 

 ' culture, and to its fitness for being grown in arid land. 



Atriplex crystallinum, J. Hooker. 



South-East Australia and Tasmania on the coast. This herb 

 vegetates solely in salty coast-sands, which, like Cakile, it helps to 

 bind, on the brink of the ocean and exposed to its spray. 



Atriplex halimoides, Lindley.* 



Over the greater part of the saline desert-interior of Australia, 

 reaching the south and west coasts. A dwarf bush, with its 

 frequent companion, A. holocarpum, among the very best for salt- 

 bush pasture. 



