APPENDIX. 



395 



appendage of some climbing plants, 

 by which they are supported by 

 twining round other objects. 



Terminal, Extreme; situated at the end. 



Tetragonal, Having four angles or 

 sides. 



Thorn, A sharp process from the 

 woody part of the plant ; considered 

 as an imperfect bud indurated. 



Tomentosc, Downy ; covered with fine 

 matted pubescence. 



Tonic, Increasing strength, or the tone 

 of the animal system ; obviating the 

 effect of debility, and restoring 

 healthy functions. 



Toothed, See Dentate. 



Trachea, Names given to vessels sup- 

 posed to be designed for receiving 

 and distributing air. 



Transverse, Crosswise. 



Trifid, Three cleft. 



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. 



Tuberous, Thick and fleshy; containing 

 tubers, as the potato. 



Tubular, Shaped like a tube ; hollow. 



Umbel, A kind of inflorescense in 

 which the flower stalks diverge 

 from one centre, like the sticks of 

 an umbrella. 



Umbelliferous, bearing umbels. 



Unctuous, Greasy ; oily. 



Undulate, Waving; serpentine; gently 

 rising and falling. 



Univocal, Certain ; regular ; pursuing 

 always one tenor. 



Vacuum, Space empty or devoid of all 



matter or body. 

 Valves, The parts of a seed vessel into 



which it finally separates ; also, the 



leaves which make up a glume, or 



spatha. 



Variety, A subdivision of a species, 

 distinguished by characters which 

 are not permanent ; varieties do not 

 with certainty produce their kind by 

 their seed. All apples are but vari- 

 eties of one species ; if the seeds of 

 a sour apple be planted, they will 

 produce, perhaps, some sweet apples, 

 some of a green color, some red : 

 there are as many trees of different 

 kinds of fruit, as there are seeds 

 planted. The quince is a species of 

 the same genus, or family, as the 

 apple; but, the seed of a quince has 

 never been known to produce an 

 apple tree. 

 Vascular, Pertaining to the vessels of 



animal or vegetable bodies. 

 Veined, Having the divisions of the 

 petiole irregularly branched on tho 

 under side of the leaf. 

 Vcntricose, Swelled out. 

 Vernal, Appearing in the spring. 

 Vertical, Perpendicular. 

 Vesicular, Made up of cellular sub- 

 stance. 

 Viridis, Green. 

 Viscid, Thick; glutinous; covered with 



adhesive moisture. 

 Vitellus, Called also the yolk of the 

 seed ; it is "between the albumen 

 and embrvo. 

 Viviparous, Producing others by means 

 of bulbs or seeds, germinating while 

 yet on the old plant. 

 Volatile, Capable of wasting away, or 

 of easily passing into the aeriform 

 state. 



Wedge-form, Shaped like a wedge ; 



rounded at the large end ; obovate 



with straightish sides. 

 Wings, The two side petals of a 



papilionaceous flower. 

 Wood, The most solid parts of trunks 



of trees and shrubs. 



