Victorian Plants. 99 



LEMNACEAE. 



484. Roots capillary. 



Flower from a marginal fissure of the frond, supported by 



a bract; anther two-celled. Lemna. 1871 



Rootless. 



Flower from a surface-cavity of the frond, unsupported by 



any bract; anther one-celled. Wolffia. 1874 



FX.nVIAX.BS. 



485. Flowers in spikes or racemes or clusters ... ... 486 



Flowers dispersed ... ... ... ... ... 490 



486. Sepals present ... ... 487 



Sepals absent ... ... ... ... ... 489 



487. Fruitlets three or six. 



Semiaquatic or terrestrial plants ; leaves always radical 

 and variously narrow; flowers in spikes or racemes; bracts 

 none; stamens and pistils in the same flowers; sepals and 

 petals each usually three, bract-like; ovularies six; perfect 

 fruitlets six or three, rarely two or four, coherent, finally 

 seceding, unprovided with stipites. Triglochin. 1875 



Fruitlets four or one 



488. Fruitlets four. 



Aquatic plants; leaves along the branches, broad or variously 

 narrow ; flowers in spikes, rarely almost in headlets or 

 clusters; sepals two and petals two, small, all bract-like ; 

 stamens and pistils each four, in the same flowers; anthers 

 much bilobed; stigmas sessile; fruitlets very small, sessile, 

 almost disconnected. Fotamogeton. 1878 



Fruitlet one. 



Oceanic plants; leaves along the branches, elongated, narrow; 

 flowers in spikes; sepals three, bract -like ; stamens and 

 pistils in the same flowers; stamens three or four; anthers 

 almost sessile, much exceeded by the connective ; stigmas 

 sessile ; fruitlet large, indehiscent, unprovided with a 

 stipes. Posidonia. 1886 



