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INTRODUCTION TO BRITISH BOTANY 



in having no partition, and bearing the seeds in a single row, as in 

 the Pea and Bean Tribe, p. 63. 



The berry, a juicy or mealy fruit, bearing the seeds immersed in 

 pulp, as in Elder, Currant, etc. 



The nut, a dry fruit, composed of a hard shell, containing a seed 

 as in Hazel, p. 267 ; and Gromwell, p. 200. 



The drupe, a nut enclosed in pulp, as the Plum and Cherry. 



The cone, a collection of imbricated or overlapping scales, each of 

 which covers two seeds. 



The Seed. A seed is said to be dicotyledonous when it is com- 

 posed of two lobes, or cotyledons, which enclose the 

 plumule, or embryo of the future plant. As the 

 seed germinates, the cotyledons either rise above 

 the ground, as in Mustard, or remain buried, as in 

 the garden Pea. Plants bearing seeds of this 

 structure compose the first Natural Class, Dico- 

 tyledonous Plants, or Exogens, p. 1. When the seed is not 

 separable into two parts, it is termed monocotyledonous ; and plants 

 bearing such seeds compose the Second Natural Class, Monocoty- 

 ledonous Plants, or Endogens, p. 269. 



Receptacle. This name is given to that part of the flower on 

 which all the others rest. It is most conspicuous in the Compound 

 Flowers, p. 146, where it is sometimes conical, as in Daisy, p. 173 ; 

 chaffy, as in Cat's-ear, p. 156 ; bristly, as in Thistle, p. 161 ; or 

 dotted, as in Dandelion, p. 160. 



Nectary. Any distinct organ in a flower which contains honey ; 

 for instance, the scale at the base of the petals in Crowfoot, p. 5 ; 

 the spurs of the Columbine, p. 8, etc. 



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, Plate 74. 



When it is inserted in the angle between the main stem and a 

 leaf, it is termed axillary, as in Balsam, p. 60. 



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. 111. 



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

 as in Grass of Parnassus. 



A stalk bearing a number of sessile flowers, arranged one above 

 another, is termed a spike, as in Plantain, p. 241. 



When, instead of being sessile, the flowers are supported on 

 simple stalks, the inflorescence is a cluster, as in Melilot, p. 68. 



A panicle differs from a cluster in being branched, as in Spurrey, 

 P- 45- 



A corymb differs from a cluster in bearing the lower flowers on 



