OP BRITISH PLANTS. 421 



petals. Ovary of several cells, with a central placenta, style one, fili- 

 form ; stigma capitate or lobed. Fruit a berry or capsule with four 

 cells. 



1. Epilobium, 181, 182. 3. Isnardia, 96, 104. 



2. CEnothera, 181, 182. 4. Circaea, 49, 56. 



Order XXX. HALORAGE.E. 



Calyx tubular, adnate with the ovary, its limb minute. Petals mi- 

 nute, from the mouth of the calyx, or none. Stamens inserted with 

 the petals, equal in number to its lobes, or twice as many. Ovary 

 with one or more cells. Fruit dry, indehiscent, with one or several 

 cells. Seed solitary, pendulous. 



1. Myriophyllum, 344, 361. 2. Callitriche, 45, 48. 



3. Hippuris, 45, 46. 



Order XXXI. CERATOPHYLLE.E. 



Flowers mono2cious. Perianth single, free, in many divisions. An- 

 thers from twelve to twenty, two-celled, two-pointed. Ovary free, 

 one-celled, with one pendulous seed. 



1. Ceratophyllum, 344, 361. 



Order XXXII. CUCURBITACE.E. 



Flowers often monoecious or dioecious. Calyx five-toothed, its tube 

 adnate to the ovary. Corolla five-cleft, often scarcely distinguishable 

 from the calyx, frequently reticulated. Stamens five, often more or 

 less coherent, anthers tortuous. Ovary with from three to five cells, or 

 one-celled, with parietal placentas, style short, stigmas lobed, thick. 

 Fruit fleshy, seeds flat, in a juicy arillus. 



1. Bryonia, 344, 360. 



Order XXXIII. PORTULACE^. 



Sepals two, rarely three, or five, coherent at the base, imbricate. 

 Petals generally five, from the base of the calyx. Stamens numerous, 

 inserted along with the petals, filaments distinct. Ovary one-celled, 

 style one or none, stigmas several. Capsule opening transversely by 

 three valves, with a central placenta. 



1. Montia, 64, 94. 



Order XXXIV. PARONYCHIE^E. 



Sepals five, rarely three or four, coherent at the base. Petals 

 minute, or none. Stamens indefinite, opposite the sepals, filaments 

 generally distinct. Ovary free, styles two or three. Fruit dry, three- 

 valved, or indehiscent, with a central placenta. 



1. Corrigiola, 114, 159. 4. Polycarpon, 61 , 95. 



2. Herniaria, 112, 136. 5. Scleranthus, 192, 1.98. 



3. Illecebrum, 111,134. 



Order XXXV. CRASSULACEyE. 



Sepals from three to twenty, united at the base. Petals the same 

 number, regular, generally free, inserted at the base of the calyx. 

 2 N 2 



