EXPLANATION OF TERMS. 



XXV 



A Determinate Inflorescence is one in which all the flowers have been 

 produced from terminal buds ; one that is indeterminate signifies that they 

 have sprung from axillary, or lateral, buds. 



A Pedicel is the individual stalk of a flower that is borne in a cluster. 



A Peduncle is the common stalk that upholds a cluster or a solitary 

 flower. 



Sessile is the word used when either flowers or leaves grow closely to 

 the stems, or branches, and are without individual stalks. 



When but one flower is produced at the end of a stem the inflorescence 

 is Terminal and Solitary. 



Sitnple Umbels. 

 FIG. 35. 



It is Axillary when the flower, or flowers, grow in the leaf axils, — that is, 

 in the angle formed by the leaf, or leaf-stalk, and the stem. (Fig. 29.) 



A Raceme is a flower-cluster wherein the individuals are arranged along 

 the sides of a common stalk and raised on pedicels of almost equal length. 

 (Fig. 30.) 



A Panicle is simply a compound raceme. 



A Thyrsus is a compound panicle, very compact and pyramidal, or oblong, 

 in outline. 



A Spike is like a raceme in all else but that its individual flowers are 

 sessile. (FiG. 31.) 



