Part 254

Xylaria, 131.

Xylariaceæ, 131.

Xylem, 251.

Xylopia, 388.

Xylophylla, 431, 432.

Xylosteum, 554.

Xyridaceæ, 308.

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, 266.

Ylang-ylang, 388.

Yorkshire-fog, 294, 296.

Yucca, 312, 313, 316.

Zamia, 253.

Zannardinia, 12, 72.

Zannichellia, 278, 279.

Zantedeschia, 305, 306.

Zanthoxyleæ, 436.

Zanthoxylum, 436.

Zea, 290, 293.

Zelkova, 351.

Zingiber, 326.

Zingiberaceæ, 277, 323, 325.