— 165 — 



times recorded, this is nothing compared willi Merw which 

 has a mean temperature for January of — 0,6 " C. (Askhabad 

 — 0,2" C, Petro Alexandrowsk — 5,5", table 1) and Yekate- 

 rinoslaw which has — 7,4," C, the minimum temperatures 

 of both localities being nearly — 20" C. or even less. 



Spain, which as regards July-temperature takes third 

 place, becomes second in this respect since the winter there 

 is much warmer than in Transcaspia (Murcia 9,3" C, Zara- 

 goza 5,2" C, Madrid 4,9" C. in January). The number of 

 annual summer-plants in this case is thus in accordance with 

 the July temperature, not that of January. This leads us 

 lo the conclusion that the January temperature may be a 

 major factor only when it is high, while marked differences 

 in the lower temperatures do not seem lo be of any import- 

 ance. The data are, however, too scanty to allow us to 

 come to any decisive conclusion. 



Table 5. 



Distribution of the growth-forms of Transcaspian species 

 amongst certain natural orders. 



Borraginaceae . . . 



Caryophyllaceae 



Chenopodiaceae 



Compositae 



Cruciferae 



Gramineae 



Labiatae 



Liliaceae 



Papilionaceae. 

 Polygonaceae . . 

 Ranunculaceae . 



Umbelliferae 



Tamaricaceae . . . . 

 Zygophyllaceae . . 



From table 5 it will be seen which natural orders are 

 specially represented by annual species in the Transcaspian 



