670 
INDEX 
Willis, J. C., 27, 30, 31, 69, 74, 
93, 99, 146, 148, 158, 173, 180, 
197, Brodiaea , Phacelia , ZV 
dostemaceae , Stanhopea 
Willow, Salix; -herb, Epilobium 
Wind, effect on geographical dis- 
tribution, 1 44; seed distribution 
by, no 
Wind-fertilisation, 60 
Wind-pollination, 60, 86, 96 
Wine-palm, Borassus , Raphia 
Wings on fruit, 1 10 ; on ovary, 
72 ; Leguminosae 
Winter aconite, Eranthis\ buds, 
x 55, 156, 159; -cherry, Bhy sa- 
ils; -cress, Barbarea\ green, 
Gaultheria, Pyrola , (chickweed) 
Trientalis ; heliotrope, Petasites 
Winter, trees in, 156 
Winter’s bark, Dri?nys 
Witch-hazel, Hamamelis 
Witches’ brooms, 20, 156 
Woad, I satis 
Wood, 33, 43, 154, 157, 158, 167; 
Arar, Callitris ; Assegai-, Cur- 
tisia\ bass-, Tilia ; bow-, Mac- 
lura ; Chittagong-, Chickrassia ; 
iron-, Mesua\ lever-, Ostrya ; 
porcupine-, Cocos ; yellow-, 
Clddrastis 
Wood anemone, Anemone*, -apple, 
Feronia', avens, Geum ; -bine, 
Lonicera ; oil, Dipterocarpus\ 
-ruff, Asperula\ rush, Luzula\ 
sage, Teucrium ; sorrel, Oxalis 
Wooden pears, Xylo 7 nelum 
Worm seed, Chenopodium 
Wormwood, Artemisia 
Wound- wort, Stachys 
Wourali, Strychnos 
Wrack, grass-, Zoster a 
Xantho- (Gr. pref.), yellow- 
Xenia, direct influence of foreign 
pollen on the mother plant 
Xenogamy, pollination from an- 
other plant 
Xero- (Gr. pref.), dry- 
Xerochastic (fruit), opening by 
drying 
Xerophile, xerophytic 
Xerophily, Cactaceae 
Xerophytes, 163-170, 26, 103, 107, 
150, i 53 » r 75 > 181-189, I 9 I > 
192, 194, Cactaceae 
Xylem, 33 
Yam, Dioscorea\ -bean, Pachy - 
rhizus 
Yarrow, Achillea 
Yellow archangel, Lamium ; bark, 
Cinchona ; berries, Rhamnus ; 
bird’s-nest, Monotropa\ cedar, 
Chamaecyparis ; cress, Bar- 
barea ; deal, Pinus\ flag, Iris ; 
-homed poppy, Glauciwji ; 
loose-strife, Lysimachia\ pim- 
pernel, Lysimachia \ pine, Pinus\ 
rattle, Rhinanthus ; rocket, 
Barbarea\ toad- flax, Linar ia ; 
water-lily, Nuphar\ wood, 
Cladrastis ; wort, Chlora 
Y erba buena, Micromeria 
Yew, Taxus 
Ylang-ylang, Cananga 
Yorkshire-fog, Holcus 
Young fustic, Rhus 
Zeodary, Curcuma 
Zoidiogamy, fertilisation by sper- 
matozoids 
Zones of vegetation, 178, 180 
Zoophily, 99 
Zygom., zygomorphic, 31, 73, 74, 
77, 82 
Zygomorphism, diagonal, right- 
and left- handed, transverse, 
74 
Zygote, 54, 81, Pteridophyta 
CAMBRIDGE: PRINTED BY J. AND C. F. CLAY, AT THE UNIVERSITY PRESS. 
