33 Class IV. Order IV. 



Order II. DIGYNM. Two styles. 



49. HAMAMELIS. Involucre three leaved ; 

 proper calyx four leaved ; petals four ; nut two 

 celled, with two horns. 



Order IV. TETRAGYNM. 



50. ILEX. Calyx four toothed ; corolla moi\o- 

 petalous ; styles none ; berry four seeded. 



51. POTAMOGETON. Calyx none ; corolla four 

 petalled ; seeds four, sessile. 



