190 



NOTES ON SOME BRITISH SPECIES OF CALLITRICHE 



this latter character and by the possession (at least at times) of linear leaves with widened 

 and deeply emarginate apices, the present description would appear to apply to subsp. 

 hamulata (Koch) Clapham. Schotsman (1954) refers to stalked and non-stalked fruits, 

 sometimes on the same plant, a character suggesting subsp. pedunculata (DC.) Clapham. 



Bracteoles (Fig. 2A 6) 



Those of the male flower small and falcate. Bracteoles of the female flower rare 

 but of the form of the male bracteoles where present. 



Fig. 2. 



A. C. intermedia. B. C. obtusangula. C. C. stagnalis. D. C. hermaphroditica. 1. General habit of fruit at node. 

 2. Face view of typical fruit (diagrammatic). 3. Fruit viewed from above. 4. Fruit in side view. 5. Bracteoles 

 of female flower. 6. Male flower (full length of stamen filament not shown). S - Style. K - Keel. 

 B - Bracteole. G - Groove. A.R. - Adventitious root. W - Wing. 



