INTRODUCTION. Xlli 



compose the first Natural Class, DICOTYLEDONOUS 

 PLANTS or EXOGENS, p. 1. When the seed is not separ- 

 able into two parts, it is termed monocotyledonous ; and 

 plants bearing such seeds compose the Second Natural 



Class, MONOCOTYL&DONOUS PLANTS, or ENDOGENS, 



p. 578. 



EECEPTACLE. This name is given to that part of the 

 flower on which all the others rest. It is most con- 

 spicuous in the Compound Elowers, p. 319, where it 

 is sometimes conical, as in Daisy, p. 375 ; chaffy, as in 

 CatVear, p. 334 ; bristly, as in Thistle, p. 348 ; or dotted 

 as in Dandelion, p. 342. 



NECTARY. Any distinct organ in a flower which con- 

 tains honey ; for instance, the scale at the base of the 

 petals in Crowfoot, p. 8 ; the spurs of the Columbine, 

 p. 19, &c. 



INFLORESCENCE. This term is used to denote the 

 arrangement of flowers on the stem. 



A flower-stalk springing directly from the root, and 

 bearing no leaves, is termed a scape, as in Primrose, 

 p. 513. 



When it is inserted in the angle between the main 

 stem and a leaf, it is termed axillary, as in Balsam, 

 p. 130. 



When it is at the extremity of the main stem, having 

 no leaves beyond it, it is said to be terminal, as in Grass 

 of Parnassus, p. 82. 



A flower-stalk which bears but one flower, is said to 

 be simple, as in Grass of Parnassus, p. 82. 



A stalk bearing a number of- sessile flowers, arranged 

 one above another, is termed a spike, as in Plantain, 

 p. 526. 



When, instead of being sessile, the flowers are sup- 

 ported on simple stalks, the inflorescence is a cluster, as 

 in Melilot, p. 151. 



A panicle differs from a cluster in being branched, as 

 in Spurrey, p. 231. 



A corymb differs from a cluster in bearing the lower 

 b 



