428 Introduction to Botany. 



Vas'cular (L. vasculum, a small vessel) : having vessels or ducts for the con- 

 duction of water and elaborated sap. 



Vein : one of the branching strands of vascular tissue in a leaf or other organ. 



Ven'tral (L. venter, the belly) : pertaining to the side of a member which 

 faces the axis from which it springs; in floral organs the side facing the 

 center of the flower; the upper surface of leaves. 



Ven'tricose : inflated or swollen on one side more than on the other. 



Ver'nal (L. vemalis, of or belonging to spring) : occurring in spring. 



Vernation : the arrangement of leaves in the bud. 



Vernicose' (L. verruca, a wart) : covered with wart-like elevations. 



Ver'satile (L. versare, to turn round) : applied to an anther which is at- 

 tached to the filament at its center only and may easily swing about, as in 

 the tiger lily. Fig. 294. 



Ver'ticil (L. verticillus, diminutive of vertex, a whirl, eddy, or whirlpool) : 

 a circle of leaves or flowers around a stem at the same node. Fig. 33. 



Vertic'illate : arranged in a verticil or whorl. 



Ves'icle (L. vesicula, diminutive of vesica, a bladder or blister) : a small, 

 bladder-like body or cavity. 



Vesic'ular : composed of or covered with vesicles. 



Vexil'lum (\^. vexillum, a banner or flag):. the upper petal of a papilio- 

 naceous flower; the standard. Fig. 266, s. 



Vil'lous (L. villus, shaggy hair) : bearing long and soft hairs. 



Vir'gate (L. virgatus, made of twigs) : wand-shaped, straight and slender. 



Vis'cid (L. viscidus, clammy) : sticky or clammy. 



Vit'ta, pi. vittae (L. vitia, a band or chaplet worn round the head) : an oil 

 tube found in the carpels of the Umbelliferfe. 



Volute' (L. valuta, a spiral scroll) : rolled up in any way. 



Whorl, pr. hwurl : an arrangement of leaves or floral organs, etc., around the 



stem at one plane. Fig. 33. 

 Wild : growing spontaneously without cultivation. 

 Wing : a membranous expansion of an organ or member, an ala. The lateral 



petal of a papilionaceous corolla. Fig. 266, w. 

 Woolly: clothed with long, coiled, or matted hairs. 



Xeroph'ilous (Gr. xeros, dry, philein, to love) : adapted to a dry climate or 



habitat. 

 Xe'rophyte, pr. ze'ro-fTte (Gr. xeros, dry; phyton, a plant) : a plant adapted 



by its structure to a dry habitat. 



