Index to Vols. XXI-XXX. 
33 
(*), 29 , 209 ; Zinnia pauciflora, 28 , 31 1 ; 
Zizania aquatica (*), 29 , 179. 
Seedling and embryo in the Gramineae, 
comparative morphology (*), 29 , 161. 
Seedlings, morphology and physiology of 
fasciated (*), 26 , 389. 
Seeds of the Conostoma group, structure 
and affinities of Palaeozoic (*), 25 , 1. 
— structure of Palaeozoic (*), 21 , 89. 
Seidelia, description of genus and species, 
27 , 398 ; distribution, 27 , 409 ; review of, 
27 , 385. 
Selaginella, anatomy of strobilus (*), 24 , 19 ; 
cones (*), 24 , 523 5 Hgule (*), 24 , 32; 
sporangia (*), 24 , 22, 23, 24 ; spore dis- 
persal (*), 24 , 25 ; variation in number of 
spores, 24 , 24 ; vegetative reproduction 
in Indian species (*), 28 , 685. 
Semi-permeable membranes of seeds of 
Gramineae, 21 , 79. 
Senecio clivorum, seedling-structure, 28 , 
317. 
— vulgaris, anomalies in ovary (*), 30 , 191. 
Septobasidium, biology of genus, 25 , 842. 
Sequoia, spp., seedling-structure (*), 22 , 706. 
Serratula tinctoria, seedling-structure, 28 , 
321. 
Sex determination in Mnium hornum (*), 
29,433. 
Sexual cell fusions and vegetative nuclear 
divisions in the Rusts (*), 22 , 331. 
— organs of Saprolegniaceae, variation (*), 
22, 361. 
Sexuality of Ascomycetes, 22 , 41, 471. 
Seychellaria, description, 21 , 74. 
— Thomassetii, description (*), 21 , 74. 
Shaw, F. J. F. : The Seedling-structure of 
Araucaria Bidwillii (*), 23 , 321. 
Shrinkage of turgid tissues, permeability of 
protoplasm measured by rate of (*), 30 , 
283. 
Sieve fields, development (*), 22 , 265. 
Sieve-plates, development (*), 22 , 269 ; of 
Cucurbita (*), 22 , 273 ; of Vitis (*), 22 , 
274 ; of Wistaria (*), 22, 270. 
Sieve-tubes, anastomosing strings (*), 22 , 
276 ; intercellular connexions (*), 22, 
278 ; structure of active (*), 22, 261. 
of Angiosperms (*), 22 , 245 ; of Ly- 
godium dichotomum, 26 , 581 ; of Mar- 
silia quadrifolia, 26 , 581; of Pteridium 
aquilinum (*), 26 , 573. 
Sigillaria mamillaris, cortex, 23 , 513. 
Silene, spp., seedling-structure, 26 , 178. 
Silphium perfoliatum, seedling-structure (*), 
23 , 308. 
Silver-leaf disease, treatment by cytoclastic 
enzyme, 27 , 172. 
Silybium Marianum, seedling-structure (*), 
28 , 317. 
S inapis alba, proteases of seeds (*), 22, 108. 
Sinnott, E. W. : Foliar Gaps in the 
Osmundaceae (*), 24 , 107. 
Sinnott, E. W. : Some Jurassic Osmun- 
daceae from New Zealand (*), 28 , 471. 
— The Evolution of the Filicinean Leaf- 
trace (*), 25 , 167. 
— The Morphology of the Reproductive 
Structures in the Podocarpineae (*) , 27 , 39. 
— and Bailey, I. W. : Investigations on the 
Phylogeny of the Angosperms. No. 4. 
The Origin and Dispersal of Herbaceous 
Angiosperms (*), 28 , 547. 
Siphonales, zoospore and motile gamete as 
taxonomic characters, 22, 14. 
Siphoneae of the T ropics, freshwater and 
terrestrial, 21, 254. 
Sisymbrium carpaticum, seedling-anatomy, 
28 , 717. 
Skene, M. : The Acidity of Sphagnum and 
its Relation to Chalk and Mineral Salts, 
29 , 65. 
Small, J. : Anomalies in the Ovary of 
Senecio vulgaris (*), 30 , 191. 
— The Pollen-presentation Mechanism in 
the Compositae (*), 29 , 457. 
Smilacina racemosa, meiotic divisions in 
microspore mother-cells (*), 29 , 471. 
Smith, G. M. : Cytological Studies in the 
Protococcales. I. Zoospore Formation in 
Characium Sieboldii, A. Br. (*), 30 , 459. 
— Id. II. Cell Structure and Zoospore 
Formation in Pediastrum Boryanum, 
(Tump.) Menegh. (*), 30 , 467. 
Snell, J. : see Fraser, H. C. I. 
Sodium chloride content of non-halophytes, 
variations in, 27 , 168. 
- — — on growth of Salicornia, effect of (*), 
29 , 143. 
Soils, weeds of arable land in relation to, 
26 , 95. 
Solanaceae, seedling-anatomy (*), 26 , 733. 
Solanum guineense, seedling-anatomy, 26 , 
734 - 
— tuberosum, anatomy of tubers (*), 24,539. 
— bacteria pathogenic to, 26 , 15 1. 
Solenostelopteris, n.gen ., description, 24 , 689. 
— japonica, n. sp., affinities, 24 , 690 ; 
description, 24,689; leaf-trace and branch 
(*), 24 , 686 ; rootlets (*), 24 , 688 ; st m - 
structure (*), 24 , 683. 
Solidago ulmifolia, seedling-structure (*), 
28 , 306. 
Sollya heterophylla, seedling-anatomy (*), 
28, 725. 
Soral position, phyletic value, 27 , 467. 
Sorghum vulgare , seedling-anatomy (*), 29 , 
185. 
Sorosphaera Graminis, a parasite on roots 
of grasses, 25 , 270. 
life-history and cytology (*), 25 , 791. 
— Junci, parasitic disease of Juncaceae, 24 , 
236; (*), 24 , 511. 
akaryote stage (*), 24 , 516 ; infection 
(*), 24,514; sporont, 24 , 516 ; structure 
of diseased roots (*), 24 , 517 ; systematics, 
D 
