646 



Nephrolepis, lime incrusta- 

 tions, 106 ; vascular bun- 

 dle in stolons, 347; vas- 

 cular system, 284, 288, 



347- 



Nephrolepis acuminata, 347. 



Nephrolepis exaltata, 347. 



Nephrolepis pectinata, 348. 



Nephrolepis ramosa, 288. 



Nephrolepis rufescens, 348. 



Nephrolepis tuberosa, 347. 



Nephrolepis undulata, 15. 



Nerium, 116, 129, 167, 470, 

 479, 486: bast, 524; cork, 

 no; latex, 184, 185; la- 

 ticiferous tubes, 194, 439 ; 

 phelloderm, 548 ; pitted 

 vessels, 160, 161 ; tracheae, 



157- 

 Nerium Oleander, 77, 194, 

 411: crystals, 530; peri- 

 derm, 548; stomata, 37, 



47, 49- 

 Neuropteris, 301. 

 Nicandra physaloides, 141 : 



hairs, 62. 

 Nicotiana, crystals, 143 ; 



sieve- tubes, 231. 

 Notholaena nivea, dusty 



hairs, 99. 

 Notobasis syriaca, secretory 



sacs, 150. 

 Nuphar, endodermis, 122 ; 



vascular system, 252, 327, 



354- 



Nuphar advena, intercellu- 

 lar hairs, 221 (Fig. 88). 



Nuphar luteum, 165, 252, 

 354: air-spaces, 215. 



Nuphar pumilum, 165, 221, 

 252. 



Nuytsia, stomata, 45. 



NyctaginesE, anomalous 



structure, 390, 593 ; ra- 

 phides, 143. 



Nymphaea, collenchyma,ii9, 

 120 ; hair structures, 56 ; 

 internal hairs, 221; vas- 

 cular system, 252, 327,354. 



Nymphsea alba, 165, 252, 



354- 



Nymphsea caerulea, 221. 



Nymphsea gigantea, 165. 



Nymphsea odorata, 221. 



Nymphseacese, air-spaces, 

 213, 21S, 217 ; fibres, 130, 

 133; intercellular hairs, 

 220, 222 ; root-cap, 413 ; 

 sclerenchyma, 423; vas- 

 cular system, 248, 250, 

 232, 



Oak, cork-periderm, 377 ; 

 growth of wood, 477. 



INDEX. 



Obeliscaria columnaris, sili- 

 cification in, 103, 106. 



Oberonia myriantha, endo- 

 dermis, 125. 



Obione, 70, 591, 592. 



Obione portulacoides, hair- 

 structures, 63. 



Octomeria, hair structures, 



55' 71- 



Octomeria grammifolia, 411. 



Oenanthe crocata, secretory 

 passages, 449, 497. 



Oenanthe pimpinelloides, 

 449. 



Oenocarpus, 266. 



Oenotherese, raphides, 143. 



Olea, 70, 324: fibres, 130; 

 sclerenchyma, 424. 



Olea emarginata, 130. 



Olea europsea, 424, 479 : 

 crystals, 143, 530; hair- 

 structures, 64; raphides, 

 143 ; stomata, 47 ; vas- 

 cular bundle, 334. 



Olea fragrans, 130, 424. 



Oleaceae, hair structures, 56, 

 64, 70. 



Oncidium flexuosum, aerial 

 roots, 229, 230. 



Oncidium pulvinatum, 229. 



Oncidium sanguineum, 229. 



Oncidium sphacelatum, 230. 



Oncidium sphegiferum, 230, 

 360. 



Oncidium species, aerial root 

 sheath, 227 (Fig. 90) ; apex 

 of root, 228 (Fig. 91). 



Onobrychis sativa, 354. 



Onoclea Struthiopteris, 118, 

 285, 427. 



Ononis spinosa, anomalous 

 thickening, 567. 



Onopordon Acanthiura, se- 

 cretory sacs, 130-167. 



Onosma, 102 : secretion, 106. 



Onosma arenarium, 106. 



Onosma stellulatum, 106. 



Ophioglossese, cork, 108 ; pa- 

 renchyma, 413; root- 

 hairs, 53; sieve-tubes, 1 80; 

 ' vascular system, 284, 283, 

 305, 318, 321, 346, 364. 



Ophioglossum pedunculo- 

 sum, 283, 305, 346. 



Ophioglossum vulgatum, 118, 

 284, 283, 303, 346. 



Ophiopogoheae, 10. 



Ophrydeae, vascular system, 

 233, 319, 362. 



Opium, 183. 



Opoponax Chironium, oil- 

 passages, 430 ; vascular 

 system, 233, 497. 



Opuntia, mucilage passages, 



202, 204, 207; secondary 

 thickening, 479 ; secre- 

 tory reservoirs, 432 ; vas- 

 cular system, 310. 



Opuntia andicola, 499. 



Opuntia cylindrica, 499. 



Opuntia peniviana, 432. 



Opuntia ramulifera, 449. 



Opuntia robusta, 432, 499. 



Opuntia tunicata, 499. 



Orchideae, 10: aerial roots, 

 229; crystals, 142; cu- 

 ticle, 76 ; depressions 

 with hairs, 55; endoder- 

 mis, 124; leaf structure, 

 411; parenchyma, 411; 

 raphides, 142; root- 

 sheath, 133, 227 ; scle- 

 renchyma, 128, 419; sto- 

 mata, 37 ; tracheides, 165 ; 

 vascular system, 278, 311, 

 3i5> 359; velamen, 227. 



Orchis, 39 : cuticle, 73 ; mu- 

 cilage, 143, 144; raphides, 

 139; stomata, 38. 



Orchis latifolia, 37. 



Orchis Morio, cuticle, 81. 



Organs, i. 



Ornithogalum, 139. 



Ornithogalum umbellatum, 

 parenchyma, 409. 



Ornus, pith, 403. 



Orobanchacese, stomata, 46 ; 

 vascular system, 233. 



Orobanche,haustorium, 384; 

 vascular system, 254, 

 366. 



Orobanche caryophyllacea, 

 254. 



Orobanche elatior, 234. 



Orobanche Rapum, vascular 

 system, 234 (Fig. in). 



Orobanche rubens, 234. 



Orobus vernus, 334. 



Oryza sativa, air-spaces, 217; 

 vascular system, 339. 



Osbeckia canescens, cortical 

 bundles, 238 (Fig. 115), 

 260 (Fig. 116), hair struc- 

 tures, 63. 



Osmunda, 34: mucilage, 99; 

 vascular system, 319. 



Osmunda cinnamomea, 54. 



Osmunda Claytoniana, 34. 



Osmunda regalis, 34 : hairs, 

 68 ; sclerenchyma, 426 ; 

 sclerotic cells, 121 ; stem 

 structure, 426 (Fig. 188); 

 vascular system, 2 8 o ( Figs. 

 128-130), 319. 



Osmundacese, parenchyma, 

 413; sieve-tubes, 180; 

 vascular system, 279, 318, 

 321. 



