620 



INDEX. 



Water-net, 52. 

 Water-purslane, 483. 

 Water -so Idler, 282. 

 Water-wort, 413. 

 Water-violet, 512. 

 Wax-flower, 546. 

 Weberia, 197. 

 Weigelia, 554. 

 Weingaertneria, 294. 

 Weisia, 196. 

 Weisiacese, 196. 

 Wellingtonia, 267. 

 Wehvitschia, 270,271. 

 " Wendungszellen," 67. " 

 West-Indian arrowroot, 



327. 



Weymouth Pine, 266, 267. 

 Wheat, 113, 291, 292, 295, 



296. 



Wheat-grain, 292. 

 Wheat seedling of, 292. 

 White-beam, 465. 

 White Bryony, 481. 

 White-cabbage, 405. 

 White-mustard, 405. 

 White Pine, 266. 

 White-pepper, 363. 

 White-rot, 164, 165. 

 White Water-lily, 387. 

 Whitlavia, 515. 

 Whortleberry, 509. 

 Wig-tree. 439. 

 Wild Basil, 540. 

 Wild Cabbage, 404. 

 Willow, 124, 133, 338. 

 Willow-herb, 4ti4. 

 Winter-aconite, 382. 

 Winter-cherry, 521. 



Winter-cress, 402. 

 Winter-green, 507. 

 Winter-spores, 146. 

 Wistaria, 470, 473. 

 Witches'-brooms, 85, 117, 



155. 



Woad, 403, 405. 

 Wolffia, 307. 

 Wood, 251. 

 Wood-rush, 284. 

 Wood-sorrel, 416. 

 Woodruff, 552, 553. 

 Woodsia, 214. 

 Wormwood, 572, 574. 

 Woundwort, 538. 



Xanthellacese, 15. 

 Xanthidium, 44. 

 Xanthium, 569, 573. 

 Xanthorhiza, 379, 383. 

 Xanthorrheea, 312. 

 Xeranthemum, 566, 570. 

 Xerotes, 312. 

 Xylaria, 131. 

 Xylariacese, 131. 

 Xylem, 251. 

 Xylopia, 388. 

 Xylophylla, 431, 432. 

 Xylosteum, 554. 

 Xyridaceee, 30$. 



Yam, 323. 



Yeast-formation, 94. 

 Yeast-fungi, 31, 36. 

 Yellow bird's-nest, 507. 

 Yellow-rattle, 525, 526. 

 Yellow Water-lily, 387. 

 Yellow-wort, 543. 



Yew, 259, 261, C66. 

 Ylang-ylang, 388. 

 Yorkshire-log, 294, 296. 

 Yucca, 312, 313, 316. 



Zamia, 253. 

 Zaimardinia, 12, 72. 

 Zannichellia, 278, 279. 

 Zantedeschia, 305, 306. 

 Zanthoxylese, 436. 

 Zanthoxylum, 436. 

 Zea, 290, 293. 

 Zelkova, 351. 

 Ziugiber, 326. 

 Zingiberacese, 277, 323, 



325. 



Zinnia, 572. 

 Zizania, 293. 

 Zizyphus, 448. 

 Zoochlorella, 9. 

 Zoogametes, 12. 

 Zoogloea, 27. 

 Zoogonicffi, 68, 70. 

 Zoosporangia, 10. 

 Zoospores, 10, 87. 

 Zooxantella, 9. 

 Zostera,279,280,306,316. 

 Zostereae, 278. 

 Zygadenus, 310. 

 Zygochytriacese, 103. 

 Zygomorphy, 277. 

 Zygomycetes, 95, 96. 

 Zygophyllaceee, 438. 

 Zygophyllum, 438. 

 Zygospore, 12. 

 Zygote, 12. 

 Zygnema, 44, 45. 

 Zygnemaceae, 44. 



Butler & Tanner, The Selwood Printing Works, Frome, and London. 



