210 IT MB 



Tegument. The skm or covering of seeds ; often burst off on boiling, 



as in the pea. 



Temperature. The degree of heat and cold to which any place is sub- 

 ject, not wholly dependent upon latitude, being affected by elevation ; 



the mountains of the torrid zone produce the plants of the frigid zone. 



In cold regions white and blue petals are more common ; in warm 



regions, red and other vivid colours; in the spring we have more 



white petals, in the autumn more yellow ones. 

 Tendril. A filiform or thread-like appendage of some climbing 



plants, by which they are supported by twining round other objects 

 Tenellus. Tender, fragile. 

 Tenuifolius. Slender leaved. 

 Tennis. Thin and slender. 

 Terete. Round, cylindrical, tapering. 

 Terminal. Extreme, situated at the end. 

 Ternate. Three together, as the leaves of the clover. 

 Tetradynamous. With four long, and two short stamens. 

 Tetrandrous. Having four stamens. 

 Thorn. A sharp process from the woody part of the plant; considei- 



ed as an imperfect bud indurated. 

 Thread-form. See Filiform. 

 Thyrse. See Panicle. 

 Tigc. See Caulis. 



Tinctorius. Plants containing colouring matter. 

 Tomentose. Downy; covered with fine matted pubescence. 

 Tonic, (from tono : to strengthen.) Medicines which increase the 



tone of the muscular fibre. 

 Toothed. See Dentate. 

 Trachea. Names given to vessels supposed to be designed Cor ??ceiv- 



ing and distributing air. 

 Transverse. Crosswise. 

 Trichotomous. Three fork,. ? 

 Trifid. Three cleft. 

 Trifoliate. Three leaved. 

 Trilobate. Three lobed. 

 Trilocular. Three celled. 



Truncate. Having a square termination, as if cut on* . 

 Trunk. The stem or bole of a tree. 



Tube. The lower hollow cylinder of a monopetalous corolla 

 Titber. A solid fleshy knob. 



Tuberous. Thick and fleshy, containing tubers, as the potato 

 Tubular. Shaped like a tube, hollow. 



Tunicate. Coaled with surrounding layers/ as in the onion. 

 Tarbinate. Shaped like a top or pear. 

 Twining. Ascending spirally. 

 Twisted. Coiled. 



U. 



Uliginosus. Growing in damp places. 



Umbel. A kind of inflorescence in which the flower stalks diverge 

 from one centre, like the sticks of an umbrella. 



