2S AN INTRODUCTION 



which may be quadridentate, split into four segments, 

 as in Diantbus ; quinquedentatc, into five, as in Al- 

 sine ; or decemdenlate, into ten, as in Cerastium ; 

 opening at the base, trifariam, into three pans, as in 

 Trigiochin and Campanula; or - quinquej'ariam, into 

 five parts, as in Ledum; at the angles, corners, longi- 

 tudinally ', lengthways, as in Oxalis and Orchis; thro' 

 a pore, hole, as in Campanula ; or horizontally, a- 

 cross the middle, as in Anagallis, Plantago, Ama- 

 ranthus, Portulaca and Hyqscyamus. 



All fruit that is articulate, jointed, opens at every 

 one of the joints, each of which is monospermous, 

 single-seeded. 



The CONFINEMENT of the seeds is sometimes 

 elastic, bursting like a spring, as in Oxalis, Elateri- 

 um, - Momordica, Impatitns, Cardamine, Phyllan- 

 thus, Euphorbia, Justicia, Ruellia, Dictamnus, Hura, 

 Ricinus, Iragia, Jatropha, Croton, Clusia and 

 Acalyphia. 



The SITUATION of the Pericarpium is at the re- 

 ceptacle of the flower, either placed under it, as in 

 Vaccinium and Epilobium; over it, as in Arbutus 

 and Tulipa ; or both above and below it, as in Saxi- 

 fraga and Lobelia. 



CHAP. XVI. 



OF THE DIFFERENT STRUCTURES OF THE SEEDS, 



IN respect to the NUMBER of Seeds contained 

 within the fruit, plants are either Monospennow, 

 having one seed, as in Polygonum and Collinsonia ; 

 dispermous, two, as in Daucus ; trispermous, three, 

 as in Euphorbia ; or tetraspermous, four, as in 

 Tournefortia. 



In respect to the number of loculaments of the 

 seed iteelt; it has but one in most plants; but is bilo- 



