247 



of white, woolly hairs. These are slightly over 1 mm. long 

 and are arranged in bunches. Each hair consists of one, 

 two or three rows of cells, the thickness decreasing from 

 below upwards (fig. 69). 



The leaf is constructed after the ordinary centric type 

 and resembles that of Horaninowia ulicina (fig. 71): There is 

 an epidermis of one layer with large papillae, a crystal-layer, 

 one layer of palisade cells with a starch-sheath, a thin zone 

 of aqueous tissue, and a thick sclerenchyma enclosing the vein. 



Fig. 69. Cornulaca Korschinskyi. Parts of axillary hairs. 

 (X 302). 



The small flowers do not open till autumn. The perianth 

 remains round the fruit and bears a spine 4 mm. in length. 



Horaninowia ulicina F. & M. 



A sand-desert plant with decumbent branches and aci- 

 cular leaves. The branches may attain a length of 20 30 

 centimetres (see fig. 70), with long internodes between the 

 pairs of opposite leaves. In the woolly-haired axils of the 

 more or less cylindrical thornlike leaves, there are either 

 rosette-shoots, or more or less elongated long-shoots, or 

 flowers. The leaves on the main branch die rather early 

 but the axillary shoots remain green. 



In favourable localities the leaves may attain a length of 

 a couple of centimetres, and the shoots are erect (var longifolia.) 



