Class IV. Order I. 31 



Class IV. TETRANDRIA. Four stamens. 



Order I. MONOGYNIA. One style. 



40. CEPHALANTHUS. Proper calyx superior, 

 funnel form ; common receptacle globular ; seed 

 one, downy. 



41. PLANTAGO. Calyx four cleft ; corolla four 

 cleft ; inferior with a reflected border ; stamina 

 very long ; capsule two celled, opening transverse- 



ly. 



43. CENTAURELLA. Calyx four parted ; corol- 

 la four parted, somewhat bell shaped ; capsule in- 

 vested with the permanent corolla and calyx, one 

 celled, two valved. 



43. MITCHELLA. Corolla monopetalous, supe- 

 rior, two on each germ; stigmas four; berry bifid, 

 four seeded. 



44. HOUSTONIA. Corolla monopetalous ; cal- 

 yx four toothed ; capsule two celled, two valved. 



45. GTALIUM. Corolla flat, superior ; seeds 

 two. 



46. CORNUS. Calyx four toothed ; corolla four 

 * petalled, superior ; drupe with a two celled nut. 



47. POTHOS. Spathe one leaved ; spadix sim- 

 ple, covered with flowers ; calyx none ; petals 

 four ; berry mostly two seeded. 



48. ISNARDIA. Calyx campanulate, four cleft, 

 permanent : corolla none ; capsule four celled. 



