in Extra-Tropical Countries. 45 



Astragalus microcephalus, Willdenow. 



From Turkey to Russian Armenia. Gum-tragacanth is collected 

 largely also from this species (Farnsworth) and from the nearly 

 allied A. pycnocladus (Boissier and Haussknecht). 



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, 

 becoming therefore alpine. 



Astragalus strobiliferus, Royle. 



Asiatic Turkey. A brown tragacanth is collected from this 

 species. 



Astragalus stromatodes, Bunge. 



Syria, at elevations of approximately 5,000 feet. Exudes Aintab- 

 tragacanth, which is also obtained from A. Kurdicus (Boissier). 



Astragalus venosus, Hochstetter. 



From Abyssinia to Central Africa. This perennial herb is subjected 

 to regular cultivation for fodder, known as " Hamat-Kochata " 

 (D. 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.* (Danthonia pectinata, Lindley.) 



New South Wales, Queensland, Northern 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.* (Danthonia triticoide*, 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 cul- 

 ture, and to its fitness for being grown in arid climes. 



Atriplex albicans, Aiton. 



South- Africa. A good salt-bush for pastures there (McOwan). 



Atriplex crystallinum, J. Hooker. 



South-Eastern Australia and Tasmania, on the brink of the ocean 

 and exposed to its spray. This herb vegetates solely in salty coast- 

 sands, which it helps to bind, like Cakile. 



