INDEX. 



^57 



Trichomanespinnatum,344. 



Trichomanes radicans, 343. 



Trichomes, 30, 54. 



Trichotosia ferox, aerial 

 roots, 229. 



Trientalis, endodermis, 415; 

 sclerenchyma, 420 ; sieve- 

 tubes, 231. 



Trifolium, 23 : vascular 

 system, 303, 305. 



Triglochin maritimum, 352. 



Trigonella, 354. 



Trigonidium Egertonia- 

 num, aerial roots, 230. 



Triodia decumbens, sto- 

 mata, 50, 



Triteleia, secretory sacs, 

 148. 



Triticuin, 54 : vascular sys- 

 tem, 359. 



Triticum caninum, stomata, 

 50. 



Triticum repens, endoder- 

 mis, 124; stomata, 50. 



Triticum vulgare, apex of 

 root, 10; lamina, 407. 



Tritonia deusta, 409. 



Trochodendron aralioides, 

 494. 



TroUius europaeus, stomata, 

 49. 



Tropaeolum, medullary rays, 

 492 ; secondary thicken- 

 ing, 474; stomata, 51; 

 vascular system, 236, 297, 

 305; water-pores, 51, 53- 



Tropaeolum Lobbianum, 

 water-pores, 52 (Fig. 19). 



Tropaeolum majus, end of 

 vascular bundle, 376 (Fig. 

 179); vascular system, 

 236, 239, 353; water- 

 pore, 53. 



Tsuga canadensis, 419 : len- 

 ticels, 563 ; medullary 

 rays, 490. 



Tsuga Douglasii, secretory 

 reservoirs, 442, 



Tubes, 5. 



Tubes, milk, 183. 



Tulipa, vascular system, 

 277, 357, 359; wax, 87. 



Tulipa Gesneriana, 357,359. 



Tulipa sylvestris, 142. 



Tupa Feuillei, laticiferous 

 tubes, 434. 



Tupa Ghiesbrechti, 434. 



Tupa salicifolia, 434. 



Tussilago Farfara, oil-pas- 

 sages, 447. 



Tyloses, see Thyloses. 



Tynanthus, 574. 

 Typha, 10, 142, 265: air- 

 spaces, 213, 216, 217 ; 



parenchyma, 409 ; scle- 

 renchyma, 418, 419, 422; 

 vascular system, 306. 

 Tyrimnus leucographus, 

 secretory sacs, 150. 



Ulex europaeus, 497 : ligne- 

 ous bundle, 495 ; tra- 

 cheides and fibres, 483. 



Ulmus, cork, no, 112; 

 crystals, 530 ; fibres, 529 ; 

 lenticels, 562, 566 ; muci- 

 lage, 143; periderm, 548, 

 558 ; secretion, 105, 106 ; 

 silica in leaves, 102 ; 

 thickening, 470, 472 ; 

 vascular system, 305 ; 

 water-pores, 5 1. 



Ulmus campestris, 472, 566 : 

 crystals, 142 ; fibres, 528 ; 

 pith, 403 ; secretion, 103 ; 

 water-pores, 51 



Ulmus effusa, 112, 472, 558, 



559- 



Ulmus montana, 108. 



Ulmus suberosa, 470, 496 : 

 cork, 550; gelatinous 

 layer, 482. 



Umbelliferae, 537: air- 

 spaces, 214, 215; cortex, 

 404 ; intercellular spaces, 

 210 ; medullary bundles, 

 535 ; medullary rays, 491 ; 

 root, 517, 524; sap-pas- 

 sages, 448 ; secretions, 

 1 37 ; secretory reservoirs, 

 202, 526 ; stomata, 46 ; 

 vascular system, 242, 248, 

 253> .298, 309, 320, 324, 

 353; water-pore, 52. 



Urania speciosa, 437. 



Urceola, latex, 185. 



Urena, fibres, 129. 



Urena sinuata, glands, 95. 



Urtica, 171 : cystoliths, 

 105 ; hair-structures, 65, 

 66, 68 ; root, 517 ; sili- 

 cification, 103 ; vascular 

 system, 236, 353. 



Urtica dioica, fibre, 131 ; 

 secondary growth, 474 

 (Fig. 203) ; silicification, 

 103 ; stinging hairs, 102. 



Urtica Dodartii, vascular 

 system, 236, 244, 308. 



Urtica excelsa, 103. 



Urtica lusitanica, 103. 



Urtica macrophylla, cysto- 

 lith cells, 105 (Fig. 45). 



Urtica macrostachys, hairs, 

 65. 



Urticaceae, 32 : cystoliths, 

 103 ; hairs, 56, 60, 66, 68 ; 



U u 



laticiferous tubes, 187, 

 439 ; secretion, 102. 



Urviilea, anomalous struc- 

 ture, 583, 601, 605. 



Urviilea laevis, 584. 



Utricularia, air-spaces, 213 ; 

 endodermis, 121 ; glands, 

 100 ; hairs, 62 ; vascular 

 system, 278, 370. 



Utricularia vulgaris, cortex, 

 405. 



Utriculi, 5. 



Vaccinium ]Myrtillus,medul- 

 lary rays, 493 ; stomata, 

 48. 



Vahea, latex, 185. 



Valeriana, 145, 297 : vas- 

 cular system, 353. 



Valeriana Phu, water-pore, 

 52. 



Valeriana sambucifolia, 



water-pore, 51. 



Valerianella, 297. 



Vallisneria spiralis, vascular 

 system, 370, 371. 



Vanda, aerial roots, 228; 

 lamina, 407. 



Vanda furva, root-sheath, 

 228, 229, 230; scleren- 

 chyma, 418 ; vascular 

 system, 302, 373. 



Vanilla, cuticle, 76 ; root- 

 sheath, 227. 



Vanilla aphylla, 227. 



Vanilla planifolia, 227. 



Vasa, 155: mixta, 156. 



Vasconcellea, fibres, 527 ; 

 laticiferous tubes, 434; 

 medullary rays, 490. 



Vasconcellea cauliflora, 434. 



Vasconcellea microcarpa, 



434- 



Vasconcellea monoica, 434, 

 527. 



Vascular bundle, axile, 277 ; 

 structure of, 316. 



Vascular bundles, arrange- 

 ment of, 232 ; collateral, 

 319 ; concentric, 339 ; 

 connections, 385 ; course 

 of, 233; development of, 

 388; ends of, 371; Di- 

 cotyledonous type, 235 ; 

 imperfect, 366 ; of Coni- 

 ferae, 235; of Gnetaceae, 

 235 ; of the leaf-trace of 

 Dicotyledons,origin, 395; 

 bundles, origin of, 23 ; 

 origin of in Monocotyle- 

 dons, 396; radial, 348; 

 in a ring, 307 ; termino- 

 logy of, 401 ; various 

 types of development, 397. 



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