TO BOTANY. 27 



In respect to external division, the pericarpium is 

 either absent, as in the order Gymnospennia of the 

 Class Didynamia ; urucapsular, consisting of one cap- 

 sule, as in Lychnis ; bicapsular, of two, as in Paeo- 

 nia and Asclepias ; tricapsular, of three, as in Vera- 

 truni and Delphinium ; qu'adricapsular, of four, as in 

 Rhodiola ; quinquecapsular, of five, as in Aquile^ia; 

 or mutiioapsular, of many, as in Caltha, Troliius and 

 Helleborus. 



The fruit in respect to the Loculaments, or inter- 

 nal divisions of the pericarpium, is either unilocular, 

 of one cell, as in Trientalis and Primula ; bilocular, 

 of two, as in Hyoscyamus, Sinapis and Nicotiana ; 

 trilocular, of three, as in Li Hum ; quadrilocular, of 

 four, as in Euonymus ; qumquclocular, of five, as in 

 Pyrola; Sexlocular, of six, as in Asarum and Aristo- 

 lochia ; octolocular, of eight, as in the species of Li- 

 num, called Radiola ; deeemlocular, of ten, as in Li- 

 num, or multtfocular, of many, as in Nymphaea. 



The pericarpium, in respect to the number of its 

 Valvules, or outer incloeures, is either bivalve, of two 

 valves, as in Chelidonium and Brassica; trivalve, of 

 three, as in Viola. Polemonium and Helianthernum ; 

 jt/uadr halve, of four, as in Ludwigia and Oenothera; 

 or quinque-cahe, of five, as in Hottonia. 



The dissepiments are either parallel to the Val- 

 vules, as in Lunaria and Draba ; or placed the con- 

 trary way, as in Biscutella and Thlaspi. 



The most considerable differences in the FIGURE 

 of the pericarpium, with the names assigned for each, 

 have been exhibited in Chap 0'. It varies farther, 

 in being turbinaie, narrowing like a child's top, as 

 in Pyrus ; inflate, puffed, as in Cardiospermum and 

 Staphylaea ; membranaipous, composed of thin mem- 

 branes, as in LTlmus; triquetrous, tetragonous, pen- 

 tagonous, of three, four, or five sides, as in Averrhoa, 

 Zygophyllum, &c. or articulate, "joined as in'Orni- 

 thopus, Hedysarum and Raphanus. 



The OPENING of the Pericarpium for discharging 

 the seeds when the fruit is ripe, is either at tne apex, 



