38 BRITISH EXAMPLES OF THE 



Involucres partial only : 

 Ex. Fool's-parsley, (iEthusa) and Chervil, (Scan- 

 dix.) 



Involucres, none : 

 Ex. Celery, (Apium) and Parsnip, (Pastinaca.) 



3. Trigynia. This order is thus subdivided : 



« Flowers superior : 

 Ex. Guelder-rose, (Viburnum) and Elder, (Sam- 

 bucus.) 



* Flowers inferior : 

 Ex. Tamarisk, (Tamarix) and Strap-wort, (Corri- 

 giola.) 



4. Tetragynia has but one British plant, Grass of 



Parnassus, (Parnassia.) 



5. Pentagynia three. Sea-lavender, (Statice) Flax, 



(Linum) and Sibbaldia. 



6. Hexagynia, Sun-dew, (Drosera.) 



7. Polygynia, Mouse-tail, (Myosurus.) 



