414 INDEX, OF SUBSTANTIVE TERMS. 
Thallus, 218 
Thecae, 212, 226 
Thyrsus, 93 
Thecaphore, 113 
Tissue, cellular, 19 
— vascular, 25 
—— vasiform,; 21 
——— woody, 24 
Torus, 105 
‘Tracheae, 25 
Trophosperm, 115 
Tube 97—99 
Tubercle, 37 
Turio, 57 
Umbel, 92 
Umbilicus, 116 
Undershrub, 43 
Unguis, 100 
Vernation, 57 
Verticillaster, 92 
Vessels, vital, 22 
proper, 22 
spiral, 25 
Vexillum, 102 
Vitellus, 118, 135 
Vittae, 321 
Whorl, 93 
Wood, 49 
Wrapper, 213 
