THE BEET FAMILY 155 



are termed halophytes, and it is in these localities that most 

 of the chenopods are fomid. Wherever the ground, on 

 drying, rapidly becomes encrusted with salt, there only 

 halophytes can grow. Plants usually halophytic may, 

 however, sometimes be found in soils that do not contain any 

 specially large amount of alkahne constituents ; but in such 

 positions they often lose many of their chief characteristics. 



Key to the Genera. 



1. Stem leafless, cylindrical, jointed. Salicornia. p. 156. 



Stem leafy, not jointed. '2 



■2. Perianth without bracts. Chenopodinni. p. 1.5,5. 



Perianth with bracts, in the female tiowers at least. 3 



3. Perianth of male flowers witliout bracts. i.\trii)le-x. 

 Perianth of male flowers bracteate. 4 



4. Perianth fleshy in the fruit. tSuaeda. 

 Perianth winged or keeled in the fruit. Salsola, i). 155. 



INot further described. 



GenuH Chenopodiiiiii. 



Herbs, often covered with a mealy dust, composed of the bladder-like, readily 

 separable cells of the hairs which cover the stems and leaves. Flowers 2-sexual, 

 small, greenish. Perianth 3-5 partite. A large genus of way-side weeds, the 

 fat-hens and goose-foots. (Name from the Greek signifying goose-foot). 7 sp. 



Chenopodium triandpum {The Triandrous Gheiiopod'i.um.) 



Stems 6 in. -12 in. high, much branched. Leaves J in. -75 in. long, entire. 

 Flowers minute, fascicled at the ends of the branches. Stamens 2-4. Both 

 islands, Auckland to Otago. PI. Nov. -Mar. This species appears to be endemic 

 in New Zealand. The specific name " triaudrum " implies that there are three 

 free stamens. 



Genux SaUoJa. 



Herbs or shrubs, with fleshy, often prickly leaves, extremely saline. 

 Flowers minute, axillary, 2-sexual. (Name from the Latin, signifying salt). 

 1 sp. 



Salsola australis (The Southern Sahohi). 



A low woody shrub, 1 ft. -2 ft. high. Leaves hard, sharp-pointed, ovate, 

 i in. -I in. long. Flowers inconspicuous. Sepals and stamens usually 5. This, 

 is, perhaps, the same as the northern Salsola kali, which, as its name implies, 

 was at one time one of the chief sources of alkali. 



