632 



BOTANY 



Wheat, "mummy," 179 



Whorls, 451, 452 



Willow, Salix 

 -herb, Epildbium 



Winter spores, see Teleutospores 

 bud, 21, 32, 96, 278 



Wistaria, 562 



Witehes'-brooms, Exoascus_ 



Woad, Isatis 



Wolffia, 475 ; rootless, 44 



Wood, 121 ; parenchyma, 102, 126, *130 ; 

 strands, 121 ; late, 123, 126, *127, 

 129 ; heart-, 124 ; sap-, 124 ; fibres, 

 127, *132 



Woodbine, Lonicera 



Woodruff, Asperula 



Woodsorrel, Oxalis Acetosella 



Wormwood, Artemisia 



Wounds, 144 



Xanthin, 75 

 Xanthium, 598 

 Xanthophyll, 57, 59, 75' 

 Xanthoria, *376, *377, 379 

 Xylaria, 356 



Xylem, see Tracheal portion 

 Xylochrome, 124 

 Xyridaceae, 470 



Yam, Dioscoreaceae 



Yarrow, Achillea 



Yeast budding of the Hemiasci, 350 



Yellow Pond-lily, Nupho/r 



-rattle, Rhinanthus 



-wort, Ohlora 

 Yew, Taxiis 

 Yucca, 249 ; thickening, 138 ; -moth, 214 



Zanarmma, 331 



Zannichellia, 484 



Za7ionia, 292 



Zea, *462, 480, 481 ; bundles, *102, *103 ; 



stem, *109 

 Zinc in plants, 172 



485, 486 ; ethereal oil, 73 

 484, *487 

 Zone, neutral, 244 ; interference, 244 

 Zooglcea, 309 



Zoospores, see Swarm-spores 

 Zostera, 484 



Zygnema, Zygnemaceae, 316 

 Zygomorphic plants, 16, 453 ; flowers, 



258, 264 

 Zygomycetes, 341-343, 347-349 

 Zygospores, 302 ; of the Conjugatae, 315, 



*316 ; otMucor, 348, *349 

 Zygote, 302 



THE END 



Printed by R. & R. Clark, Limited, Edinburgh 



