OF BRITISH PLANTS. 421 



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

 filiform ; 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. Circsea, 49, 56. 



Order XXX. HALORAGE.E. 



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

 minute, 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. MyriophyUum, 344, 361. 2. Callitriche, 45, 48. 



3. Hippuris, 45, 46. 



Order XXXI. CERATOPHYLLE.E. 



Flowers monoecious. Perianth single, free, in many divisions. 

 Anthers 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 distin- 

 guishable 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^E. 



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

 Petals generally five, from the base of the calyx. Stamens nume- 

 rous, 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. PAKONYCHIE^. 



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

 minute, or none. Stamens indefinite, opposite the sepals, fila.- 

 ments generally distinct. Ovary free, styles two or three. Fruit 

 dry, three-valved, or indehiscent, with a central placenta. 



1. Corrigiola, 114, 159. 3. Polycarpon, 61, 95. 



2. Hernfaria, 112, 136. 4. Scleranthus, 192, 198. 



3. Illecebrum, 111, 134. 



Order XXXV. CRASSULACE.E. 



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

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



2N2 



