6^8 



J.XDE X. 



Vascular system, anomalous, 

 24S ; anomalous mono- 

 cotylcdonous, 274 ; Com- 

 melinaceous type, 269 ; in 

 leaves, 296 ; of Palms, 

 263 (Fig. 118); Palm 

 type, 26 r. 



Velamen, 227. 



Venidium calendulaceum, 

 446. 



Verhascum, hairs, 62, 70. 



Verbascum phlomoides, 

 hairs, 62. 



\'erbena maritima, 470. 



Verbenacea", hairs, 61 ; sili- 

 cification, 103. 



Verbesina gigantea, hairs, 6 2 . 



Verbesina virginica, water- 

 pores, 51. 



Verhiiellia, medullary bun- 

 dles, 249, 278 ; vascular 

 system, 340. 



Vernonia eminens, secre- 

 tory sacs, 1 50. 



Vernonia flexuosa, 150. 



Vernonia noveboracensls, 

 150. 



Vernonia praealta, 150. 



Vernoniaces, secretory sacs, 

 149. 



Veronica incisa, vascular 

 system, 243. 



Veronica Lindleyana, 411. 



Veronica speciosa,32o, 411. 



Vessels, 155, 165. 



Vessels, annular, 156. 



Vessels, forms of, 478. 



Vessels, length of, 168. 



Vessels, mixed, 156. 



Vessels, pitted, 479. 



Vessels, reticulate, 156. 



Vessels, scalariform, 158. 



Vessels, spiral, 156. 



Vessels, width of, 168. 



Vessels, width of spring and 

 autumn, 503. 



Viburnum Awafouki, pits, 



71- 



Viburnum Lantana, bast- 

 fibres, 526 ; crystals, 142 ; 

 periderm, 548 ; pith, 403. 



Viburnum lantanoides, 548. 



Viburnum Opulus, 470, 548 : 

 bast-fibres, 527 ; cork, 

 no ; glands, 96 ; peri- 

 derm, 549 ; stomata, 48. 



Viburnum Oxycoccos, 548: 

 crystals, 142. 



Viburnum prunifolium, 548. 



Viburnum Tinus, glands, 96; 

 pith, 403 ; secretion, 98. 



Vicia Faba, glands, 95 ; 

 stomata, 38, 48 ; vascular 

 system, 353, 354. 



Vicia sativa, glandular hairs, 



95 ; vascular system, 354. 



Vicia scgetalis, stomata, 48. 



Vicia sepium, glands, 95. 



Victoria regia, 165: endo- 

 dcrmis, 125; prickle- 

 pores, 54. 



Villarsia, internal hairs, 222. 



Villarsia parnassifolia, air- 

 spaces, 215, 218. 



Villi, 54. 



Vinca, fibres, 129; latici- 

 ferous tubes, 187, 194, 



439, 525- 



Vinca minor, 194: vascular 

 system, 243. 



Vincetoxicum officinale, 

 root-structure, 516. 



Viola, secretion, 98. 



Viola elatior, vascular sys- 

 tem, 239, 296, 298. 



Viola tricolor, stomata, 47. 



Virgilia lutea, 496 : crystals, 

 142 ; periderm, 548 ; 

 phelloderm, 549. 



Viscum, 70, 483, 485 : bast- 

 fibres, 527 ; haustorium, 

 384; hgneous bundle, 496. 



Viscum album, 77, 535: 

 stomata, 45. 



Vitex incisa, 493. 



Vitis, 166, 467, 479: bast, 

 523 (Fig. 213); bor- 

 dered pits, 163; crystals, 

 141, 530; fibres, 134, 

 527 ; hair-structures, 65 ; 

 lenticels, 560 ; ligneous 

 bundle, 495 ; periderm, 

 555; raphides, 143 ; sieve- 

 tubes, 175, 176; thylo- 

 ses, 170, 171 ; vascular 

 system, 236, 324, 353. 



Vitis vinifera, 308, 484 ; 

 sieve-tubes, 173, 175, 176 

 (Figs. 69, 70) ; sieve- 

 tubes, &c., 178 (Figs. 74- 

 76); spiral vessels, 158; 

 vascular system, 241. 



Water, excretion of, 50. 



Water-plants, air-spaces in, 

 210. 



Water-pores, 50 ; in sub- 

 merged parts, 53. 



Water-stomata, 50. 



Wax, extrusions, 83 ; im- 

 bedded, 82. 



Wax-layers, development 

 of, 87. 



Welwitschia mirabilis, ano- 

 malous structure, 614; 

 cross-section of leaf, 408 

 (Fig. 187) ; crystals, 141 ; 

 fibres, 133 ; sclerenchy- 



ma, 132 (Fig, 55), 420, 

 422, 424 ; secretion, 102, 

 144; vascular bundle, 335 

 (Fig. 157) ; vascular sys- 

 tem, 248, 301, 325, 372, 

 382 ; vascular system in 

 leaves, 303 (Fig. 145). 



Widdringtonia, vascular 

 system, 246. 



Widdringtoniacupressoides, 

 secretory passages, 443, 

 526. 



Widdringtonia juniperina, 

 246. 



Wigandia, hairs, 60. 



Willdenowia, 425. 



Wintera, 25. 



Wintereae, medullary rays, 

 490, 494 ; secondary 

 changes, 480, 



Wistaria sinensis, anomal- 

 ous wood, 589 ; lenticels, 

 560. 



Wolffia, 142, 366. 



Wood, 475 : classification 

 of the elements, 487 ; dis- 

 tribution of the tissues in, 

 488 ; heart, 508 ; inter- 

 calary, 569 ; of dicotyle- 

 donous roots, 516; sap, 

 507 ; successive zones of, 

 and annual rings, 504 ; 

 ripe, 507. 



Woodwardia, vascular sys- 

 tem, 285. 



Xanthochymus, resin pas- 

 sages, 451. 



Xanthochymus pictorius, 

 secretions, 145. 



Xanthosia, 498. 



Xanthosia rotundifolia, 449, 

 458. 



Xanthosoma, 436. 



Xeranthemum cylindra- 

 ceum, secretory reser- 

 voirs, 446, 447. 



Xerotideae, 10, 



Xylem, 317, 321. 



Xylosteum, 309. 



Xyris, vascular system, 327, 



Yucca, sclerenchyma, 422 ; 

 vascular system, 264, 323. 

 Yucca aloifolia, 618, 620. 

 Yucca filamentosa, 323, 407. 



Zamia, mucilage-passages, 

 441; parenchyma, 410; 

 sclerenchyma, 419 ; vas- 

 cular system, 337, 357. 



Zamia furfuracea, 357. 



Zamia integrifolia, 13, 410, 

 419. 



