— 187 



on the lower side. Round the 

 veins, whicli are numerous, there 

 are rings of large translucent cells 

 between which there are very nar- 

 row bands of chlorophyllous tissue. 



Astragalus unifoliatus Bge. 

 A shrub attaining a height of 

 until 0,7 metre. It is strongly 

 branched, the branches being spread 

 out and crooked. The bark of 

 older branches shows a network 

 of fibres. The green parts are 

 densely coated with greyish or 

 whitish haii's. The leaves are small 

 and pinnate with four leaflets at 

 the beginning of the vegetative sea- 

 son, but later they are ternate or 

 only single-leaved. Towards summer 

 most of the leaflets fall off and 

 the rachis remains like a wooden 

 peg 0,6 — 2 centimetres long, later 

 during the summer it likewise 

 withers. The leaflets are elliptical 

 or lanceolate and small, generally 

 no more than a centimetre long, 

 but occasionally they may be 2 

 centimetres. The stipules are con- 

 nate, clasping the branch. 



Part of a young year-shoot is 

 shown in fig. 33 where the bran- 

 ching is seen. Sometimes the bran- 

 ches again produce lateral shoots. 

 These branches are assimilating 

 shoots which do not persist. In 

 their place one or more new shoots 

 will arise next year so that here 

 again, sometimes in a very marked 

 degree, we find branches arranged 

 in bunches. 



Fig. 33. A year-shoot of 4s//a- 

 galiis uiiifolialus (red.) June. 



