— 204 — 



(1897, p. 206V Transcaspian specimens correspond with his 

 description, but I have not found slone-cells in the basal 

 part of the leaf, nor the layer of short subepidermal cells 

 recorded by Warming. In the leaf, as in the bark of young 

 stem-internodes (fig. 44), there are three (or four) layers of 

 small palisade cells which inwards are abruptly replaced by 

 larger ones containing only a few chlorophyll grains. These 

 adjoin a system of veins which branch out in great numbers 

 through a certain zone of the bark or the mesophyll, and 

 only within this zone is there a perfectly translucent aqueous 

 tissue; this last is divided into two parts, an outer zone 

 of large cells, and an inner zone of smaller cells. 



The epidermis is thick and papillose, and the stomata 

 are sunk. 



Suseda microphylla Pall. 



This species is known to me only from descriptions and 

 herbarium material. Perhaps it should be considered as a 

 chamaephyte as the stem is said to be decumbent. The 

 stem may attain a thickness of 4 centimetres. The branches 

 are long and widely spread out. The year-shoots ai'e branched 

 both in the inflorescence and in the vegetative portion, some- 

 times twice branched. 



The leaves are typical Szjcerfa-leaves, rather short. The 

 plant flowers in July and the fruit is ripe in October. 



Suseda physophora Pall. 



This plant is said to be a shrub about one metre high, 

 but I have not seen it. 



Lycium ruthenicum Murr. 



A shrub from 10 to about 60 centimetres high, spiny 

 and with outspread branches. It is a salt-bush not generally 

 found on sand. 



Under specially favourable circumstances the year-shoots 

 may attain a length of more than 60 centimetres, but as a 



