34 TETRANDIIIA. 



45. SHERARDIA. Corolla tubular ; fruit crowned with the calyx, 

 each seed with 3 teeth. (Flowers umbellate.) 



* * * Flowers monopetalous, inferior. 



48. PLANTAGO. Corolla reflexed; stamens very long; capsule 



bursting all round, of 2 or 4 cells. (Flowers in simple 

 dense spikes.) 



* * * * Petals 4. 



49. CORNUS. Nectary ; drupa inferior ; nut of 2 cells. (Flowers 



cymose or umbellate.) 



***** Petals wanting* 



50. PARIETARIA. Calyx 4-cleft, inferior ; stamens elastic ; seed 



invested with the elongated calyx ; some flowers without 

 stamens, their calyx remaining unaltered. 



51. ALCHEMILLA. Calyx 8-cleft, inferior ; seed 1 or 2, naked. 



II. TETRAGYNIA. 



52. ILEX. Corolla wheel-shaped, of 1 or 4 petals ; berry with 4 



seeds ; styles ; some flowers barren. 



54. SAGINA. Petals 4 ; capsule of 1 cell and 4 valves : calyx 4. 



leaved. 



55. RADIOLA. Petals 4 ; capsule of 8 cells and 8 valves ; calyx 



of 1 leaf, in 12 segments. 



53. POTAMOGETON. Petals 4 ; calyx 0; seeds 4, naked, sessile. 



(Aquatic. Flowers spiked, greenish, raised above the 

 water.) 



