URTICACE^E. NETTLE TRIBE. 



559 



CALLiTRicHK VERNA (Vernal Water Star-wort). 



*Two other British species of Callitriche are de- 

 scribed by botanists, which vary in a slight degree from 

 the preceding, but they are not of common occurrence, 

 and are on other accounts scarcely deserving of a sepa- 

 rate notice. 



ORD. LXXVIIL TJKTfCACE^E. NETTLE TRIBE. 



Stamens and pistils generally in separate flowers, and 

 often on different plants ; perianth divided, not falling 

 off, sometimes wanting; stamens equal in number to 

 the lobes of the perianth, and opposite to them ; anthers 

 curved inwards in the bud, and often bursting with 

 elasticity ; ovary 1, simple ; fruit a hard and dry 1- 

 seeded capsule. A difficult order, the limits of which 

 are variously assigned by different botanists. In its 

 widest extent it contains a number of valuable fruits, 

 as the famous Bread-fruit, and Jack-fruit (Artocarpus 

 indsifolia and A. integrifolia), the Fig, Mulberry, and 

 Sycamore of the Scriptures. The Upas-tree of Java, 

 and Palo-de-vaca or Cow-tree of Demerara, are arranged 

 in the same Order, with many others. In its more 

 limited extent the Nettle Tribe contains 23 families, 



