(49) 



2. Paeonia. Sepals 5, herbaceous, carpidia 

 distinct from the beginning. 



3. Aquilegia. Sepals petaloid. Petals fun- 

 nel-shaped, calcarate. 



B. Ovaries 1-ovulate, indehiscent. Fruit, akenes. 



a. ^Estivation of sepals imbricate. 



1. Ranunculus. Petals unguiculate, claws 

 shorter than the lamina, a nectarium 

 near each claw. 



2. Myosurus. Claws of the petals longer 

 than the lamina. 



3. Anemone. Sepals petaloid. Petals 0. 

 Thalamus convex, conical. 



4. Thalictrum. Sepals petaloid. Petals 0. 

 Thalamus flat, discoid. 



b. ^Estivation of sepals valvate. 



1. Clematis. Sepals 4, petaloid. Petals 0. 



DIDYNAMIA. 

 I. Gymnospermia. 



A. Stamens and style enclosed. An interrupted 



ring of hairs in the corolla below tlie in- 

 sertion of the stamens. 



1. Marrubium. Akenes flat at their tops. 



B. Style always exserted. An uninterrupted 



ring of hairs in the corolla below the inser- 

 tion of the stamens. 

 3 



