GLOSSARY OF BOTANICAL TERMS. 235 



TYPE, a plant supposed to represent the most strongly character- 

 ized genus or species of an order or family. 



UMBEL, having the peduncles rising from a common centre, as in 



the Umbelliferce. 



UMBILICUS, the hilum or scar of the seed. 

 UMBONATE, having a protuberance in the centre as in a shield. 

 UNCINATE, furnished with a curved or hooked point. 

 UNDULATE, waved or sinuous. 

 UNGUIS, a claw, the narrow base of a petal. 

 UNILATERAL, on one side, leaning to one side. 

 UNISEXUAL, when flowers are either male or female. 

 URCEOLATE, shaped like a pitcher, contracted at the mouth. 

 UTRICLE, a seed with a loose bladdery covering. 



VAGINA, the sheathing portion of leaves. 

 VALVES, the opening divisions of a seed-vessel. 

 VALVATE, an organ joined by its edges, opening by valves. 

 VEINS, the thickened branching vessels as they occur in leaves. 

 VERNATION, the manner in which leaves are folded in the bud. 

 VERSATILE, the filament attached to the back of the anther which 



swings freely. 



VERTICIL, VERTICILLATE, organs arranged in a whorl. 

 VESICLE, in the form of a small bladder. 

 VESSELS, the tissue of plants composed of tubes terminating in 



obtuse or tapering ends. 

 VEXILLUM or STANDARD, the broad back petal in a papilionaceous 



corolla. 

 VEXILLARY, in the aestivation of papilionaceous corollas, when 



the vexillum covers the other parts of the flower. 

 VIRGATE, in the form of a small switch. 

 VISCID, clammy. 



VITT^:, the linear receptacles of oil in the fruit of the Umbelliferce. 

 VIVIPAROUS, bearing young plants in place of flowers or fruit. 

 VOLUBLE, a stem or tendril twining round other stems for support. 



WARTED, covered with small protuberances. 



WEDGE-SHAPED, cuneate ; shaped like a wedge. 



WHORL, organs arranged in a circle round an axis. 



WINGED, having a leafy or membranous border. 



WINGS or ALJE, the two lateral petals in pea-shaped flowers. 



ZONED, having stripes or belts. 

 ZIGZAG, bending from side to side. 



