(288) 



Family 1. NYMPHS ACE^. 



Sepals and petals inserted into a fleshy, cup- 

 shaped thalamus. Stamens oo, oo-seriate, in- 

 serted with the petals; filaments flat, petaloid, 

 anthers introrse, adnate. Carpidia several, 

 immersed in the thalamus, and presenting the 

 appearance of a oo-celled ovary; ovules oo, 

 inserted on the partitions; styles united and 

 forming a radiate, peltate stigma, projecting 

 beyond the thalamus and persistent. 

 1. Nuphar Smith. Water-Lily. 



Sepals more than 4, petaloid. Petals go, 

 short, densely crowded round the thalamus. 

 Stigma stipitate. Fruit a baccate pseudocarp. 

 71' Aquatic. Flowers yellow. 



1. N. POLYSEPALUM Engelm. Sepals more 

 than 7. — Near the Marine Hospital. Taylor- 

 ville, Paper-mill Creek. Summer. 



Series 3. PERIGYN^. Thalamus cup- 

 shaped, bearing sepals, petals and stamens, 

 and receiving the carpidia in shape of a recep- 

 tacle, which in many instances surrounds the 

 carpidia enough to form an inferior ovary. 



Section 1. Calycifloki:. Petals present and 

 distinct, 4 or 5. Stamens 4 or 5, or their mul- 

 tiples. 



Order 1. MYPvTALES. Calyx lobes val- 

 vate in aestivation. Petals as many, or a mul- 



