INDEX. 



651 



Pterocarya, 498, 537. 



Pterocarya caucasica, fibres, 

 527 ; medullary rays, 493. 



Punica, 497, 536 : bast- 

 fibres, 527; crystals in 

 bast, 530, 531 (Fig. 215); 

 ligneous bundle, 495 ; 

 periderm, 552, 559. 



Punica Granatum, 484 : 

 crystals, 142 ; medullary 

 rays, 489 ; secondary 

 thickening, 471, 479. 



Pupalia Schimperiana, 591, 



593- 

 Pyrethrum, oil-passages, 



446, 458. 

 Pyrethrum inodorum, sto- 



mata, 37. 

 Pyrethrum Parthenium, 



446, 447. 

 Pyrethrum roseum, hairs, 



61. 

 Pyrostegia, 574. 

 Pyrus, see Pirus. 



Quercus, 459, 483 : annual 

 rings, 476; cork, no, 

 III, 112, 557; crystals, 

 140, 530; fibres, 528; 

 hairs, 62 ; lenticels, 562 ; 

 ligneous bundle, 495; me- 

 dullary rays, 489 ; mu- 

 cilage, 74 ; periderm, 

 548,558; pith, 403 ; pits, 

 481; pitted vessels, 163; 

 sclerosis, 540; thyloses, 

 171 ; tissues, 507 ; tra- 

 cheldes and fibres, 483 ; 

 vascular system, 298, 353, 

 391. 



Quercus Cerris, 489. 



Quercus glabra, 411. 



Quercus occidentalis, 550. 



Quercus pedunculata, 479, 



496, 497, 505> 540> 548 : 

 annual rings, 506 ; crys- 

 tals, 142, 530 ; fibres, 133; 

 length of elements of 

 tissue, 507 ; ligneous bun- 

 dle, 495 ; medullary rays, 

 489 ; mucilage, 74 ; tra- 

 cheides and fibres, 483; 

 vascular system, 303, 304, 

 308 ; wood, 511. 



Quercus Pseudosuber, 550 : 

 cork, 557. 



Quercus Robur, pith, 403 ; 

 thyloses, 171. 



Quercus Suber, 540, 548, 

 550 : cork, no, in, 112, 

 113, 114, 557; lenticels, 

 562, 563. 



Quiina, secretions, 144. 



Quillaja, crystals, 142, 529, 



530; fibres, 528; secre- 

 tions, 138. 

 Quillaja saponaria, crystals, 

 142; sieve-tubes, 173,175. 



Radula, 71. 



Rafflesiaceae, point of at- 

 tachment, 384. 



Ranunculaceae, 25, 310, 454 : 

 secretions, 137; vascular 

 system, 324. 

 ■'^Ranunculus, 25, 56, 407: 

 sheath, 415; stomata, 49 ; 

 vascular system, 306, 323, 

 327, 366. 



RahuncuTus aquatilis, 25, 31, 

 53, 67 : stomata, 46, 49. 



Ranunculus divaricatus, 31, 

 53 : stomata, 49. 



Ranunculus Ficaria, 67. 



Ranunculus fluitans, 366, 

 415 ; root-structure, 123 

 (Figs. 49, 50) ; section of 

 vascular bundle, 3j 2 (Fig. 

 153); vascular bundle, 

 353 (Fig. 163). 



Ranunculus lanuginosus, 

 water-pore, 52. 



Ranunculus repens, 366, 

 422, 504: section of vas- 

 cular bundle, 331 (Fig. 

 152); vascular bundle, 

 356 (Fig. 165). 



Ranunculus sceleratus, sto- 

 mata, 49, 50. 



Raphanus sativus, 1 2 : root, 

 516; vascular system, 353. 



Raphides, 137. 



Ravenala, vascular system, 

 267. 



Ravenala madagascariensis, 



437. 

 Reaumuria, 107. 

 Red Fir, growth of wood, 



477- 



Renanthera coccinea, aerial 

 roots, 228, 229 ; scleren- 

 chyma, 418. 



Renanthera matutina, 229. 



Reservoirs of gum, 202. 



Reservoirs of mucilage, 202. 



Reservoirs of resin, 202. 



Reservoirs, secretory ar- 

 rangement of, 431. 



Resin of Pinus, &c., origin 

 of, 510. 



Resin-passages, 441. 



Resin reservoirs, 202, 441. 



Resins, 145. 



Restiaceae, sclerenchyma, 

 419 ; stomata, 35. 



Restio diffusus, cellulose 

 covering, 88; sclerenchy- 

 ma, 425; stomata, 75. 



Restio incurvatus, 425. 



Restio paniculatuS; 425. 



Restio tectorum, 425. 



Reticulate vessels, 156. 



Rhamnus, ligneous bundle, 

 495 ; pith, 403 ; tracheides 

 and fibres, 483. 



Rhamnus cathartica, 495, 

 509 : annual rings, 506 ; 

 stomata, 48. 



Rhamnus Frangula, 479, 

 498, 507, 536: crystals, 

 140, 530; fibres, 528; 

 lenticels, 563 ; phello- 

 derm, 459 ; stomata, 48. 



Rhaphidophora, 268. 



Rhaphidophora angustifolia, 

 secretory reservoirs, 445 ; 

 stone elements, 127 ; vas- 

 cular system, 361. 



Rhapis flabelliformis, vascu- 

 lar system, 266, 302, 329, 



373. 



Rhaponticum, 150. 



Rheedia, resin passages, 451. 



Rheedia lateriflora, secre- 

 tory reservoirs, 145. 



Rheum, anomalous wood, 

 585; collenchyma, 119; 

 glandular hairs, 90; se- 

 cretory sacs. 1 47. 



Rheum Emodi, 585. 



Rheum officinale, 585. 



Rheum Rhaponticum, in : 

 root, 517, 524. 



Rheum unduiatum, 524. 



Rhexigenetic, 200. 



Rhinanthaceae, haustorium, 

 383,458. 



Rhinanthus, stomata, 37. 



Rhipsalideae, vascular sys- 

 tem, 256, 297, 310, 456. 



Rhipsalis, cortical bundles, 

 261. 



Rhipsalis carnosa, 261. 



Rhipsalis Saglionis, 261. 



Rhipsalis saiicornioides, 261. 



Rhizocarpeas, vascular sys- 

 tem, 313. 



Rhizophora, fibres, 130; 

 H -shaped intercellular 

 hairs, 220, 223; scleren- 

 chyma, 423. 



Rhododendron, 102: glands, 

 91, 93, 96,97; pith, 403 ; 

 stomata, 49. 



Rhododendron caucasicum, 

 glands, 91. 



Rhododendron ferrugi- 

 neum, glandular scales, 

 91, 97 (Fig. 41); hair 

 structures, 64. 



Rhododendron hirsutum, 

 glands, 91. 



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