MORPHOLOGY, ANATOMY, AND PHYSIOLOGY. 



805 



Wolffia, 511. 

 Wolf's-bane, 593. 

 Wood Germander, 613. 

 Wood Lily, 559. 

 Woodruff, 658. 

 Woodsia, 391, 405. 

 Wood-sorrel, 613. 

 Woody Nightshade, 649. 

 Wormwood, 664. 

 Woundwort, 643. 

 Wrangelia, 271, 272. 

 Wych Elm, 579. 



Xanthorrsea, 558. 

 Xenodochus, 307. 

 Xiphion, 569. 

 Xylaria, 276, 301. 

 Xylophylla, 622. 

 Xyridaceee, 638, 555. 



Xyris, 556. 



Yam, 560. 



Yarrow, 664. 



Yeast, 273, 300 (Fig. 210). 



Yellow Flag, 569. 



Yellow Loosestrife, 651. 



Yellow Monkey-flower, 



644. 

 Yellow Rocket, 604. 

 Yellow Welsh Poppy, 601. 

 Yew, 487. 

 Yucca, 535, 558. 



Zamia, 481. 

 Zanardinia, 257, 261. 

 Zannichellia, 553. 

 Zannichelliese, 553. 

 Zantedeechia, 541. 



Zanthoxyleae, 614. 

 Zanthoxylum, 614. 

 Zea, 515,536 (Fig. 347), 547. 

 Zephyranthes, 567. 

 Zingiber, 562. 

 Ziugiberactee, 538, 562. 

 Zingibereee, 562. 

 Zmnia, 664. 

 Zonaria, 263. 

 Zostera, 515, 553. 

 Zostereae, 553. 

 Zygnema, 215 (Fig. 174). 

 ZygnemeeB, 244. 

 Zygodon, 370. 

 Zygogonium, 216. 

 Zygomycetes, 275, 280, 



285. 

 ZygophyllacecB, 503, 574, 



614. 



PART II.— MORPHOLOGY, ANATOMY, AND PHYSIOLOGY. 



Abietic anhydride, 709. 

 Absorption, 667, 668, 692. 



law of, 693. 



of gases, 695. 



of liquids, 693. 

 Accumbeut, 604. 

 Acheue, 530. 

 Achlamydeous, 512. 

 Acicular, 463. 

 Acids, organic, 708, 728. 

 Acrocarpous, 356. 

 Acropetal development of members, 



23, 45, 52, 62, 497. 

 Acropetal development of tissue, 177. 

 Acrotonous. 564. 

 Actinomorphic symmetry, 507. 

 Acuminate, 54. 

 Acute, 54. 



Acyclic flower, 496 (Fig. 311), 592. 

 Adhesion, 36, 518. 

 Adnate, 516. 

 Adventitious members, 19, 21, 189, 223, 



396. 

 .^cidiospore, 305. 

 iEcidium, 276, 303 (Fig. 214). 

 Aerial roots, 63, 158, 209, 682. 

 .^Istivation, 59. 

 Agamogenic, 771. 

 Air-bladders, 266. 

 Air-cavity, 156 (Fig. 120), 165. 

 Air-chamber, 130, 165, 338 (Fig. 241). 

 AIbb, 617 (Fig. 419), 635 (Fig. 435). 

 Albuminates. 707. 

 Albumins, 707. 

 Albuminous seed, 458. 



Albumoses, 707. 



Alburnum. 199, 677. 



Aleuron, 112 (Figs. 68, 69), 459, 707, 



727. 

 Aldehydes, 708. 

 Alkaloids, 707, 728. 

 Allylic isothiocyanate, 709. 

 Alternation of generations, 3, 217, 



2i0, 230, 289, 324, 372, 431. 

 Aluminium, 710. 

 Ambisporangiate flower, 77, 432, 494, 



515. 

 Amentum, 493, 579. 

 Amides, 707, 720, 725, 727. 

 Ammonia, 712, 721. 

 Amoeboid movement, 69, 283. 



stage, 283. 

 Amphigastria, 64, 334. 

 Amphithecium, 189, 331 (Fig. 239), 



360. 

 Amplexicaul, 47. 

 Amygdalin, 708, 724. 

 Am^lin, 708. 

 Amylolytic enzyme, 724. 

 Amyloplastic, 98. 

 Amyioses, 708. 

 Anabolism, 667, 669, 716. 

 Anaerobia, 723. 

 Analogous, 2. 

 Anatomy, 89. 



Anatropous ovule, 437 (Fig. 284). 

 Andrcecium, 494, 516. 

 Aiidrogynous, 338. 

 Androphyte, 3. 

 Androspore, 249. 



