Glossary 



253 



Raceme, An elongated flower cluster with all the pedicels about equal 



in length. See page 257. 

 Rachis. The axis of a spike or other body. The axis of a pinnately 



compound leaf. 



Ray flowers. The outer strap-shaped corollas of a composite flower. 



See page 258. 

 Rays. Same as ray flowers. 



Receptacle. The more or less enlarged tip of a stem which bears the 



flower parts. See page 258. 

 Recurved. Curved back or down abruptly. 

 Reticulate. Net-like. Net-veined. 



Rib. A main or prominent leaf vein. A ridge on a fruit. 



Rootstock. Rootlike parts of stems under ground. A prostrate or 



subterranean stem, usually sending out roots at the nodes. 

 Scale. A minute leaf. A reduced leaf at the base or beginning of a 



shoot. 



Seed. A ripened ovule. 



Sepal. One of the divisions of the calyx. See page 258. 



Serrate. With teeth like a saw. With sharp teeth directed forward. 



See page 256. 

 Sessile. Without a stalk. Closely seated upon. 



Sheath. The lower tubular part of a leaf inclosing the stem as in 

 grasses. 



Shrub. A bushy, woody growth usually branched at or near the base, 

 less than 15 feet in height. A woody perennial usually with several 

 main stems and smaller than a tree. 



Simple. Undivided. Not compound. Applied to leaves. See page 

 255. 



Spathe. One or more bracts which enclose a flower cluster. 

 Spatulate. Spoonshaped. Gradually narrowed toward the base from 



a rounded tip. See page 256. 

 Species. A group of individuals which are more like each other than 



they are like any other group. 

 Spike. An elongated axis which bears sessile flowers. See page 257. 

 Spine. A sharp woody or rigid outgrowth from the stem. 

 Spur. A hollow projection from a sepal or petal. See page 257. 

 Standard. The upper usually broad petal of a bonnet-shaped flower. 



See page 257. 



Stamen. The organ of the flower which bears the pollen. See page 258. 

 Stigma. The tip of the pistil. The pollen lodges on the stigma. 

 Stipules. A pair of leaf like organs at the base of the petiole of some 

 leaves. 



