474 APPENDIX II. 



u. 



Urtica dioica (Stinging Nettle). Stinging hairs, etc., 95. Young leafy 

 stems. Fresh. 



V. 



Vallisneria spiralis. Movements of protoplasm, 48. Strong, rather old, 

 leaves. Fresh. Very commonly and easily grown in aquaria. 



Vaucheria sessilis. Structure and reproduction, 295. Strong plants taken 

 from still or flowing water, and placed the day before wanted in a 

 shallow vessel with fresh water. 



Verbascum nigrum (Mullein). Coloured cell-sap, 55, 92. Flowers. Fresh. 



Hairs, 92. Flowers. Fresh, or in alcohol. 



Ends of vascular bundles, 199. Flowers. Fresh, or in alcohol. 

 A native herbaceous perennial, flowering in July and August. 

 thapsiforme. Felted hairs, 93. Leaves. Fresh, or in alcohol. 



Veronica serpyllifolia. For pollen-tubes in situ, 408. Ovaries of just- 

 fallen flowers. Fresh. 



Vinca major, or V. minor (Periwinkle). Coloured cell-sap, 56. Flowers. 

 Fresh. 



Sclerenchyma fibres, 72. Stems. Fresh, or in alcohol. Native 

 or introduced, perennial evergreen plants, flowering July to Sep- 

 tember. 



Viola tricolor (Pansy). Hairs, 92. Flowers. Fresh, or in alcohol. Can 

 be had from May to September. 



Stipular glands, 98. Young stipules. Fresh, or in alcohol. 



Virginia Creeper. See Ampelopsis hederacea. 



Viscum album (Mistletoe). Intercellular protoplasmic threads, 458. Stems, 

 fresh. 



W. 



Wallflower. See Oheiranthns Cheiri. 

 Wheat. S*e Triticum. 



Y. 



Yew. See Taxus baccata. 



Yucca. Structure of ovary, 396. Ovaries. In alcohol. 



Z. 



Zea Mais (Maize). Structure of vascular bundles, 101. Young stems. In 

 alcohol. 



