SYNOPSIS OF THE GENERA. XXIX 



p age Order 2. DIGYNIA. 



114. GENTIANA. Cal. 4-cleft. Cor. monopetalous, 4-cleft, hair 

 in the throat. 



Order 3. TETKAGYNIA. 



26. SAGINA. Sep. 4. Pet. 4, shorter than the sepals. Capsule 



1 -celled, opening by 4 valves. 



112. ILEX. Cal. 4 5-toothed. Cor. rotate, 4 5-cleft. Stigmas 

 4, sessile. Fruit a fleshy berry with 4 1 -seeded hard nuts. 

 Le. spinescent. 

 30. RADIOLA. Cal. 4-cleft; each lobe 2 3-cleft. Pet. 4. 



Capsule with 8 cells and 8 valves. 



171. POTAMOGETON. Perianth single, of 4 scales. Anthers 

 sessile, opposite to the segments of the perianth. Pistils 4. 

 Achenes sessile. 



(See Cerastium.) 



Class 5. PENTANDRIA. 



Order 1. MONOGYNIA. 



A. Cor. monopetalous, inferior, bearing the stamens in the throat. 



Fruit 4-lobed. 



85. BORAGINACE^E. 



B. Cor. monopetalous, inferior. Fruit 1 -celled, st. opposite to the 



segments of the cor. 

 88. PRIMULACE^E. 



C. Cor. monopetalous, inferior. St. alternate with the segments 



of the cor. 



84. GENTIAN ACE^E. Capsule 1 or imperfectly 2-celled, with 



parietal placentation. Le. ribbed. 



86. SOLANACE^E. Fruit 2-celled, or Jialf 4-celled, many-seeded. 



Fl. often out of the axil. 

 125. VERBASCUM. Cor. rotate, somewhat irregular. St. unequal, 



2 or more hairy at the base. 

 114. POLEMONIUM. Cor. rotate. St. upon the valves which 



close the mouth of the cor. Fruit 3-celled. 



85. CONVOLVULACE^E Cor. campanulate, plaited in the bud. 



Stigmas 2. Fruit 2 3-celled, few-seeded. 



113. VINCA. Cor. sc'ver-shaped. Stigma capitate, contracted 

 in the middle. Fruit of 2 follicles. 



D. C >rolla monopetalous, superior. 



83. CAMPANULACE.E. St. distinct from the corolla. Style 

 pubescent above the middle. Fruit a capsule. 



