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GLOSSARY 



Subsoil, the layer below the humus and soil which 

 is derived from the underlying- rock formations. 



Subulate, awl-shaped, tapered to a fine point. 



Sucker, an underground shoot producing a stem 

 at the end. 



Sun plants, plants that seek the light. 



Switch plants, with reduced leaves, with green 

 shoots serving as leaves. 



Symbiosis, when two plants are intimately asso- 

 ciated for mutual benefit. 



Syncarpous, an ovary or fruit with the carpels 

 joined. 



Tendril, a thread-like organ used for climbing 1 . 



Tentacle, a sensitive hair, as in Drosera. 



Terete, round, in transverse section. 



Ternate, in threes, as of leaflets. 



Thalamus, the receptacle of a flower. 



Tomentose, with densely-matted woolly hair. 



Torulose, knotted. 



Torus, the receptacle. 



Transpiration, the giving off of aqueous vapour 



from leaves, &c. 



Trifid, divided into three parts nearly half-way. 

 Trigonous, with three angles and three convex 



faces. 



Truncate, blunted. 

 Trunk, main stem. 

 Tuber, a subterranean fleshy shoot. 

 Tubercle, a small wart-like excrescence. 



Tumid, swollen. 



Turfophilous, growing on humus or peat. 



Turgidity, a state of tension in a cell due to 

 osmotic pressure of the cell-sap and elastic ten- 

 sion of the cell-wall. 



Tussock formations, badly drained pastures, made 

 up of tussocks which exclude other plants. 



Umbel, when clusters of stalked flowers radiate 



from a centre. 



Umbilicate, peltate, hollow from the stalk upward. 

 Undershrubs, the lesser shrubs that lurk under 



scrub, &c. 

 Unilateral, turned on one side. 



Valvate, opening by means of valves, of capsules. 



Venation, the arrangement of the veins. 



Ventricose, swollen below. 



Vernation, the arrangement of the leaves in a bud. 



Verticillate, in whorls. 



Villose, with long soft hair. 



Viscous, sticky. 



Whorl, with parts arranged in a circle. 



Wood, the xylem or hard lignified part of a stem. 



Xerophilous, fond of dry conditions. 

 Xerophytes, plants used to dry conditions. 



Zoochorous, dispersed by animals. 



Printed in Great Hritain fy R. & U. Cr.ARK, LIMITKD, 



