286 



GLOSSARY 



dwarfed branches. See spine, 

 prickle, bristle. 



Throat. The upper part of the 

 corolla tube in a flower with 

 united petals. 



Tomentose. Heavily covered 

 with cotton-like or wool-like 

 matted hair. 



Tomentulose. Finely and close- 

 ly tomentose. 



Tomentum. An entangled cot- 

 tony or woolly, hairy cover- 

 ing. 



Truncate. Abruptly cut off so 

 as to appear squarish. Used 

 often in describing the apices 

 and bases of leaves. 



Tube. The portion of a corolla 

 or calyx formed by the union, 

 edge to edge, of petals or sep- 

 als. 



Tuberculate. Bearing small 

 warts or tubercles. 



Umbel. An inflorescence in 

 which the flower pedicels all 

 arise from a common point at 

 the top of the peduncle. 



Undulate. Wavy or sinuous. 

 Used in describing leaf mar- 

 gins; differs from crenate in 

 that the waves are long and 

 not very toothlike. 



Undulate-serrate. The same as 

 undulate, except that the 

 waves are shorter and some- 

 what resemble teeth. 



Urn-shaped. Having the shape 

 of an urn; that is, broad at 

 the bottom and constricted 

 into a throat near the top. 

 Used in this manual only to 

 indicate the shape of certain 

 fruits and flowers. 



Valve. One of the sections into 

 which a dry, dehiscent capsule 

 divides when it opens. 



Verticillate. Arranged in 

 whorls. Used to indicate the 

 grouping of leaves in threes 

 or more at the nodes. Con- 

 trasting words are alternate 

 and opposite. 



Villous. Covered with long, 

 soft hairs. Used especially 

 to describe the hairy coating 

 of leaf surfaces. 



Wedge-shaped. Tapering to a 

 point. Used in this text espe- 

 cially to describe leaf bases 

 that taper regularly and 

 sharply to the petiole. 



Whorled. Arranged in a circle 

 or ring. In this text used par- 

 ticularly when three or more 

 leaves occur in a ring at each 

 node; practically the same as 

 verticillate. 



Winged. Provided with a 

 wing. Used in this text for 

 thin outgrowths which serve 

 as wings in distributing the 

 seeds on which they grow. 



