328 GLOSSARY 



Sessile. Stemless. 



Shrub. Plants with woody structure and with several stems 



springing from the ground or near it, or whose stems are 



much-branched. Usually smaller than trees. 

 Sinus. The margin between the lobes. 

 Spadix. A spike having a fleshy axis. 



Spathe, One or more large bracts inclosing an inflorescence. 

 Spike. Sessile or nearly sessile flowers borne on a somewhat 



elongated axis. 



Spine. A sharp growth from the stern. 

 Sterile. Unproductive. 



Stigma. The portion of the pistil receptive to the pollen grain. 

 Stipule. An appendage at the base of a leaf stem, sometimes 



joined to the petiole. 

 Style. The portion of the pistil connecting the stigma and 



ovary. 



Tendril. A slender, coiling part of a climbing plant, aiding in 

 its support. 



Umbel. A flower cluster in which the pedicels spring from a 

 common point. 



Whorl, A circular arrangement of leaves, etc., around a stern. 



