694 



SCIENCE 



[N. S. Vol. XXXIX. No. 1010 



in Bailey's " Cyclopedia of Horticulture." 

 The plant seems particularly at home in 

 northern Africa and in the immense semi- 

 arid and desert region comprising the 

 Aralo-Caspian district, Eussian Turkestan, 

 Arabia, Persia, etc. The following eleven 

 species are listed by nurserymen in this 

 country, but the accuracy of the names is 

 not yet determined: Tamarix Parviflora, T. 

 Algerica, T^ Amurensis, T. Odessana, T. Ohi- 

 nensis, T. Gallica and variety Indica, T. his- 

 pida i=T. Kashgarica), T. juniperina (==T. 

 Japonica and T. plumosa), T. tetrandra and 

 T. Germanica. T. Germanica and eight or 

 nine others are now, however, referred to 

 Myricaria. 



The most common species in cultivation in 

 this country appear to be T. parviflora and T, 

 gallica, the latter originating in southern 

 France. Discussions on the tamarisk have 

 commonly referred to it as being of African 

 origin. For our Great Plains and the drier 

 portions of the western states most likely the 

 species of Siberian origin would be best 

 adapted. Numerous specimens have been in- 

 troduced into this country by the U. S. De- 

 partment of Agriculture, chiefly from China 

 and Chinese Turkestan. 



It is very important not to confuse the 

 tamarisk with the tamarack, an extremely 

 different plant, adapted in fact to marshes. 



These few notes on the above subject are 

 offered with the hope that interest will be 

 stimulated in much more extensive plantings 

 of this remarkable drought-resistant and 

 alkali-resistant shrub in the districts in this 

 country where it is adapted. 



Mark Alfred Carleton 

 U. S. Department of Agriculture, 

 Washington, D. C. 



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