50 Class IV. Order I. 



62. ICTODES. Spathe one leaved ; spadix oval, 

 covered with flowers ; calyx wedge shaped ; seeds 

 numerous, globular, imbedded in the spadix. 



63. LUDWIGIA. Calyx four parted, superior ; 

 petals four ; capsule quadrangular, four celled. 



64. ISNARDIA. Calyx campanulate, four cleft, 

 permanent ; corolla none ; capsule four celled. 



Order II. DIGYNIA. Two styles. 



65. HAMAMELIS. Involucre three leaved ; proper 

 calyx four leaved ; petals four ; nut two celled, with 



two horns. 







66. SANGUISORBA. Calyx two leaved, inferior ; 

 corolla flat, four cleft, superior ; capsule four cor- 

 nered. 



Order IV. TETRAGYN1A. 



67. ILEX. Calyx four toothed ; corolla mono- 

 petalous ; styles none ; berry four seeded. 



68. POTAMOGETON. Calyx none ; corolla four 

 petalled ; seeds four, sessile. 



69. RUPPIA. Calyx none ; corolla none ; seeds 

 four, pedicelled. 



