INDEX. 



(^55 



506; cuticle, 7s; gela- 

 tinous layer; 482 ; len- 

 ticels, 565; periderm, 558; 

 wax in epidermis, 75, 82. 



Sorbus, medullary rays, 492; 

 periderm, 546 (Figs. 216- 

 218); pith, 403. 



Sorbus Aria, 403 : crystals, 



529- 



Sorbus Aucuparia, 112, 403, 

 471,480, 509. 



Sorbus torminalis, 403, 492. 



Sorghum, vascular system, 

 359; wax, 83. 



Spaces, intercellular, 4, 210. 



Sparganium, 10 : air-spaces, 

 213, 216, 217; parenchy- 

 ma, 409; raphides, 142; 

 sclerenchyma, 418 ; vas- 

 cular system,265,3o6, 328. 



Sparganium ramosum, 71, 

 212, 328. 



Sparmannia, bast, 528 (Fig. 

 214); fibres, 527; lig- 

 neous bundle, 495. 



Sparmannia africana, 537 : 

 crystals, 530; wood, 514. 



Spartium monospermum, 

 418. 



Spartium scoparium, 479. 



Spathiphyllum lancaefolium, 

 internal hairs, 222 ; vas- 

 cular system, 268. 



Spergula, vascular system, 

 243. 



Spergula arvensis, 236, 30S. 



Sphenopteris, 301. 



Spilanthes fusca, 447. 



Spinacia, 353. 



Spiraea, ligneous bundle, 495 ; 

 phelloderm, 552; tra- 

 cheides and fibres, 4S3, 

 527. 



Spiraea chariiaedrifolia, 484. 



Spiraea opulifolia, crystals, 

 142 ; ligneous bundle,495 ; 

 periderm, 552. 



Spiraea salicifolia, 484, 485. 



Spiraea ulmifolia, 536 : fibres, 

 527; sieve-tubes, 522. 



Spiral vessels, 156. 



Spirodela, crystals, 142. 



Spirodela polyrrhiza, 370, 



371. 



Spironema fragrans, vascu- 

 lar system, 270. 



Sphnt, 507. 



Spondias cytherea, resin- 

 passages, 452. 



Spreckelia, 139. 



Spruce Fir, growth of wood, 

 477. 



Squamae, 54. 



Stachys, hairs, 61, 70. 



Stachys angustifolia, vascu- 

 lar system, 244 (Figs. 104, 

 105). 



Stachys sylvatica, 354, 35s. 



Stangeria, 300, 301, 306 : 

 anomalous growth, 611 ; 

 secretory reservoirs, 441. 



Stanhopea, root sheath, 227, 

 230; sclerenchyma, 128; 

 vascular system, 302, 359. 



Stapelia, latex, 184, 439. 



Staphylea, 47.0 : ligneous bun- 

 dle, 495. 



Staphylea pinnata, 67 : lig- 

 neous bundle, 495 ; peri- 

 derm, 548 ; secondary 

 changes, 480 ; .secretions, 

 138 ; stomata, 45. 



Starch, absence of, 66. 



Starch-layer, 415. 



Starch-ring, 415. 



Statice, lime scales, 107 ; 

 medullary bundles, 249 ; 

 parenchyma, 408, 410. 



Statice alata, 107. 



Statice latifolia, 107, 410. 



Statice monopetala, 107, 

 408: fibres, 130; vascular 

 system, 305. 



Statice purpurascens, 107. 



Statice purpurea, 107, 408. 



Statice scoparia, 107. 



Stelis, 411 : hairs, 55. 



Stellatae, 298. 



Stem, hypocotyledonary, 

 236. 



Stems, structure of herba- 

 ceous, 491. 



Stenocarpus sinuatus, 411. 



Sterculiaceae, mucilage, 143. 



Stigmaphyllum, anomalous 

 wood, 577 ; glands, 96 ; 

 vascular system, 376. 



Stigmaphyllum, ciliatum, 96, 

 602. 



Stigmaphyllum cristatum, 

 96. 



Stipa pennata, stomata, 49, 

 50. 



Stizophyllum, 574. 



Stoma, 34. 



Stomata, 34: absence of, 46 ; 

 distribution of, 47 ; on 

 rhizomes, 47 ; in grasses, 

 50 ; in marsh plants, 50 ; 

 in water plants, 49 ; on 

 floating leaves, 49 ; num- 

 ber of, 48 ; water, 50 ; 

 cell- wall, 71. 



Stone-cells, 127. 



Stone-elements, 127. 



Stratiotes, ro: vascular sys- 

 tem, 273. 



Stratiotes abides, 10, 165. 



Strelitzia, air-spaces, 217; 

 tannin, 437; thyloses, 171 ; 

 vascular system, 267 ; wax 

 rods, 86, 87. 



Strelitzia ovata, endoder- 

 mis, 124; parenchyma, 

 41 1 ; stomata, 39, 40 ; wax 

 rods on epidermis, 83, 85 

 (Fig. 29). 



Strelitzia reginae, 267. 



Structure in relation to phy- 

 sical conditions, 24. 



Struthiopteris, 285, 313. 



Strychnos, 25 : anomalous 

 wood, 569, 578, 579 (Fig. 

 229); sieve-tubes, 231; 

 vascular system, 319,338. 



Strychnos brachiata, 578. 



Strychnos colubrina, 578. 



Strychnos innocua, 578. 



Strychnos multiflora, 578. 



Strychnos Nux vomica, 578. 



Strychnos toxifera, anoma- 

 lous thickening, 578. 



Succisa, 297. 



Syagrus, vascular system, 

 266. 



Sykesia, 580. 



Symphoricarpus vulgaris, 

 pith, 403. 



Symphytum, mucilage, 143. 



Symphytum officinale, root, 



517- 



Syngonium, laticiferous 



tubes, 436 ; vascular sys- 

 tem, 268. 



Syringa, crystals, 529; 

 glands, 64 ; hairs, 64 : pe- 

 riderm, 548 ; tracheides 

 and fibres, 483. 



Syringa Josikaea, 479, 502. 



Syringa persica, lenticels, 

 564. 



Syringa vulgaris, 484, 502 : 

 cortex, 404 ; medullary 

 rays, 489; pith, 403 ; pits, 

 481 ; secondary thicken- 

 ing. 471,472, 479- 



System, 6. 



Tabernaemontana, 439. 



Taccaceae, 10: vascular sys- 

 tem, 301, 304. 



Taeniopteris, 301. 



Tagetes, oil-passages, 440, 

 446; vascular system, 244. 



Tagetes erecta, vascular sys- 

 tem, 353. 



Tagetes lucida, 244. 



Tagetes patula, endodermis, 

 121, 415 ; secretory reser- 

 voirs, 201, 203, 446, 447. 



Tagetes signata, 244. 



Tamarix, pits, 163. 



