40 
Annals of Botany. 
Nuclear Division in Mnium hornum (*), 
23, 141. 
Wilson, M. : Preliminary Note on Nuclear 
Division in Mnium hornum, 22, 328. 
— Preliminary Note on the Spermatogenesis 
of Mnium hornum, 24, 235. 
— Plant Distribution in the Woods of North- 
east Kent. Part I (*), 25, 857. 
— Sex Determination in Mnium hornum 
(*), 29, 433. 
— Spermatogenesis in the Bryophyta (*), 
25, 415. 
Wilting, stomatal behaviour during (*), 30, 
47- 
Winge, O. : see Ferdinandsen, G. 
Wistaria, development of sieve-plate (*), 22, 
270. 
Wood, origin of herbaceous type in Angio- 
sperms (*), 25, 215. 
— of Dicotyledons, evolutionary history and 
phylogenetic significance of foliar ray (*), 
26, 647. 
— of Larix, effect of defoliation on growth 
and structure of (*), 27, 621. 
Woodburn, W. L. : Spermatogenesis in 
Blasia pusilla (*), 27, 93. 
— Spermatogenesis in certain Hepaticae 
(*), 25, 299. 
— Spermatogenesis in Mnium affine, var. 
ciliaris, (Grev.) G . M. (*), 29, 441. 
Woods of North-east Kent, plant distribu- 
tion n, 25, 857. 
Woodsia, phyletic consideration (*), 26, 306. 
Woodwardia, phylogeny (*), 28, 401. 
Woody plants, distribution of chlorophyll in 
young shoots (*), 21, 437. 
Woolery, R.: Meiotic Divisions in the 
Microspore Mother-cells of Smilacina 
racemosa, (L.) Desf. (*), 29, 471. 
Worsdell, W. C.: A Study of the Vascular 
System in certain Orders of the Ranales 
(*), 22, 651. 
— Internal Phloem in Myristica (*), 22, 
526. 
— The Morphology of the ‘Gorona* of 
Narcissus {*), 28, 541. 
— The Morphology of the Monocotyle- 
donous Embryo and that of the Grass in 
particular (*), 30, 509. 
— The Origin and Meaning of Medullary 
(Intraxylary) Phloem in the Stems of 
Dicotyledons. I. Cucurbitaceae (*), 29, 
567. 
Wound reactions in filicinean petioles (*), 
26, 777; in Pteris aquilina (*), 30, 127. 
X. 
Xanthium strumarium, seedling-structure, 
28, 309. 
Xenoxylon, spp., structure of wood (*), 27, 
535. 
Xeromorphy in marsh plants (*), 26, 815. 
Xerophilous species of Cheilanthes and Pel- 
laea, anatomy (*), 28, 671. 
Xerophytes, resume and hypothesis on 
swamp, 26, 854. 
Xerophytism of Coniferae, rationale of, 24, 
260. 
Xylem elements of Pteridophyta (*), 25, 
745. 
physical tests for, 25, 748. 
— of Equisetum, centripetal (*), 23, 587. 
-- of Ophioglossaceae, primary (*), 25, 537. 
— of petioles of Cycads, the centripetal and 
centrifugal (*), 28, 103. 
Y. 
Yapp, R. H. : On Stratification in the 
Vegetation of a Marsh, and its Relations to 
Evaporation and Temperature (*), 23, 
275. 
— Spiraea Ulmaria, L., and its Bearing on 
the Problem of Xeromorphy in Marsh 
Plants (*), 26, 815. 
Yasui, K. : On the Life-history of Salvinia 
natans (*), 25, 469. 
— see Miyake, K. 
Yendo, K. : Development of Costaria, Un- 
daria, and Laminaria (*), 25, 692. 
— On the Mucilage Glands of Undaria (*), 
23, 613. 
Yezonia, external form, 24, 767 ; internal 
structure (*), 24, 768 ; stomata (*), 24, 
768 ; structure of axis (*), 24, 769. 
— a reply to criticism, 25, 269. 
Z. 
Zaluzianskya capensis, seedling-anatomy, 26, 
740- 
Zea, respiration of seeds, 22, 427 ; seed- 
ling-anatomy (*), 29, 19 1 ; vitality and 
self-digestion of endosperm, 22, 454. 
Zinc, action of compounds of, on growth of 
plants (*), 28, 284. 
Zingiberaceae, seedling-anatomy (*), 29, 
209. 
Zinnia pauciflora, seedling-structure, 28, 
311. 
Zizania aquatica, seedling-anatomy (*), 29, 
179- 
Zoospore formation in Characium Sieboldii 
(*), 30, 459 ; in Pediastrum Boryanum 
(*), 30, 467. 
Zygnema ericetorum, morphology and eco- 
logy of an extreme terrestrial form (*), 
30, 135. 
cell contents (*), 30, 136; cell wall 
(*), 30, 139; comparison of forms, 30, 
147 ; reaction to drought (*), 30, 14 1. 
Zygnemaceae in the Tropics, 21, 260. 
Zygopteris Grayi, affinities, 26, 61 ; an 
ankyropteris, 26, 55 ; aphlebiae (*),26,5o, 
60 ; leaf-trace emission (*), 26, 47 ; leaf- 
trace morphology and structure (*), 26, 
45, 57 ; petiole (*), 25, 451 ; roots (*), 
26, 52 ; stelar structure (*), 26, 44, 49, 
57 ; the Shore specimen (*), 26, 43. 
Zygospores of Sporodinia grandis, cytology 
(*), 28, 455- 
