210 UMB 
Tegument. ‘The skin or covering of seeds; often burst off on boiling, 
as in the pea. 
Temperature. ‘I'he degree of heat and cold to which any place 1s 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. 
Tenutfolius. Slender leaved. 
Tenuis. ‘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; consider- 
ed as an imperfect bud indurated. 
Thread-form. See Filiform. 
Thyrse. See Panicle. 
Tige. 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. 
Trachee. Names given to vessels supposed to be designed for receiv- 
ing and distributing air. 
Transverse. Crosswise. 
Trichotomous. Three fork. ? 
Trifid. Three cleft. 
Trvfoliate. Three leaved. 
Trilobate. ‘Three lobed. 
Triltocular. ‘Three celled. % 
Truncate. Having a square termination, as if cut off. 
Trunk. ‘The stem or bole of a tree. 
Tube. The lower hollow cylinder of a monopetalous corolla. 
Tuber. A solid fleshy knob. ; 
Tuberous. Thick and fleshy, containing tubers, as the potato. 
Tubular. Shaped like a tube, hollow. 
Tunicate. Coated 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. 
