VASCULAR PLANTS. 103 



9. Clematis, L. 



Sepals 4 ,petaloid, not imbricate in aestivation. 

 Petals 0. Ovaries 1-ovulate. Fruit oo akenes, 

 caudate by the persistent style. U , ^ • 



ORDER XXIH. RANALES. 



Floral parts having a tendency to merge 

 gradually into each other. 



Family LXX. Nymphgeacese. 



Sepals and petals inserted into a fleshy, cup- 

 shaped thalamus. Stamens go, co-seriate, in- 

 serted with the petals; filaments flat, petaloid; 

 anthers introrse, adnate. Carpidia several, im- 

 mersed in the thalamus, and forming an co-loc- 

 ular ovary; ovules go, inserted on the partitions; 

 styles united, and forming a radiate, peltate 

 stigma, projecting beyond the thalamus and 

 persistent. 



I. Nuphar, Smith. 



Sepals 5, petaloid. Petals go, in several se- 

 ries, at length recurving, persistent. Stigma 

 stipitate. Fruit baccate. 



It . aquatic, flowers yellow. 



SERIES IH. PERIGYNiE. 



Thalamus cup-shaped, bearing sepals, petals, 

 and stamens ; and enveloping and including the 

 carpidia. 



