xlii 
BOTANICAL TERMS AND DEFINITIONS. 
terminates the stem ; is applied also to flowers and umbels 
proceeding from the extremity of the stem or branches. 
Tern A Folia, leaves growing three together, 
TerNATE, (Ternatum) applied to compound leaves, consisting of 
three leaflets. 
Thorn, (Spina) a sharp projection proceeding from the wood.* 
Three-edged, (Trigonum) applied to leaves having three sides, 
and three angles. 
Three-nerved, or Ribbed, (Trinerve) leaves are so called when 
they have three ribs, all distinct from the base, and uncon- 
nected with the margin. 
Three-sided, (Triqueter) applied to stems having three flat sides. 
Thyrsus, vide Bunch. 
Tongue-shaped, (Lingulaium) applied to leaves of an oblong, 
blunt, thick form, generally of a cartilaginous substance at 
the edges. 
Toothed, vide Dentate. 
Triangular, {Triangular e) applied to leaves having three sides, 
and to stems having three edges. 
Trigonum, vide Three-edged. 
Trilobum, vide Lobed, &c. 
Trinerve, vide Three-nerved. 
Triply-ribbed, (TripUnerve) applied to leaves when a pair of 
large ribs branch oflf from the main rib just above the 
base. 
Triqueter, vide Three-sided. 
Trowel-shaped, vide Deltoid. 
Truncatum, vide Abrupt. 
Tuberous, (Tuberosa) roots are so called when solid and of a round 
form, from such small fibrous roots often shoot out, both 
from beneath and laterally : example the potatoe. 
Tube, (Tubus) the round hollow part of a monopetalous flower is so 
called. 
Tubular, (Tubulosi) applied to the florets of a compound flower, 
when they form a cylindrical tube, and are five-cleft. 
Tubulosum, vide Hollow. 
Tuft, vide Capitate. 
* It is observed by Linnseus, that many plants in their wild state have thorns, which 
by cultivation disappear : example the pear. Ed. 
