INDEX 



Radial symmetry, 21, 22. 



Radicle, 401. 



Radish, 363. 



Rafflesia, 361, 421, 422, 507; R. Patma, 



Fig. 405. 



RafHesiaceae, 361, 404, 421, 476. 

 Ramaliua, 190, 192, 468; R. reticulata, 



Fig. 156. 



Ranales, 411, 422, 424, 425. 

 Ranunculaceae, 356, 425, 443. 

 RauuuculineEe, 443. 

 Ranuuculus, 32, 367, 425, 500; R.multi- 



fidus, Fig. 468 ; R. repens, Fig. 26. 

 Raphe, 363. 

 Raphides, 55, 56, 389. 

 Rattan-palm (Calamus) , 369, 386. 

 Ravenala, 394. 

 Ray-floret, 365. 

 Receptacle (of flower), 350. 

 Red Alga; (see also ' ' Rhodophyceae ") , 16, 



49, 92, 190, 191, 194, 195, 196, 496. 

 Red Cedar (Juniperus Virginiana), 149, 



178. 



Red Maple (Acer rubrum), 500. 

 Red Snow (Sphserella nivalis) , 96. 

 Reduction of chromosomes, 199. 

 Redwood (see "Sequoia"). 

 Reed, 369. 

 Regular flower (see " Actinomorphic 



flower "). 



Reindeer-moss (Cetraria Islandicd), 192. 

 Reproduction, 2, 8, 9, 13, 30, 510. 

 Reseda, 351 ; R. odorata, Fig. 315. 

 Resedaceae, 429, 444. 

 Resedineie, 444. 

 Reserve-food, 54. 

 Resin, 39. 

 Resin-duct, 334. 



Respiration, 2, 7, 8, 9, 13, 42, 461, 480, 481. 

 Resting-spores, 30, 82, 194, 125, 496. 

 Rhabdonema, 141 ; R. tenera, Fig. 110. 

 Rhabdosphere, 86. 

 Rhamnaceae, 438, 459. 

 Rhamnales, 424, 438, 446. 

 Rhamnus, 438, 459. 

 Rhaphidiuiu, 98; R. polymorphum, Fig. 



68. 



Rheotropism, 489. 

 Rheum, 422, 423. 

 Rhexia, 441'. 

 Rhiphidium, 155, 156; R. Americanum, 



Figs. 119. 120. 

 Rhizogenic cells, 261. 

 Rhizoid (see "Root-hair"). 

 Rhizome, 23, 362. 



Rhizophora mangle (see "Mangrove"). 

 Rhizophorace.ne, 441. 

 Rhizophore, 310. 



Rhizopus (see " Mucor stolonifer"). 



Rhizoselenia, 88. 



Rhodobacteriaceae, 78. 



Rhododendron, 450. 



Rhodophyceae (see also "Red Algae"), 



92, 134, 135, 136, 137, 147, 173, 472, 473, 



510,530; structure and reproduction, 



135-137. 



Rhodymeniales, 142, 145. 

 Rhceadales, 424, 429, 444. 

 Rhceadineae, 444. 

 Rhubarb (see "Rheum"). 

 Rhus, 363, 435, 437 ; R. cotinus, Fig. 427 ; 



R. toxicodendron, 3(53, 410. 

 Ribes, 431, 432, 524, 525; R. Cynosbati, 



Fig. 420; R. speciosum, Fig. 4'.i 

 Riccardia (see " Aneura"). 

 Riccia, 20, 199, 200, 201, 204, 207, 208, 210, 



211, 212, 220 : R. Jiuitans, 201, 207 ; R. 



glauta, Figs. 11, 165, 171; R. tricho- 



carpa, Figs. 161, 171. 

 Ricciaceae, 207. 

 Ricciocarpus natans, 195, 202, 207, 208, 



498, Fig. 163. 

 Rice, 385. 



Richardia, 388, 389, 519, Fig. 487. 

 Ricinus, 54, 401, 403, 405, 436, 527, Figs. 



a5, 383. 



Rivularia, 80, 82, 496. 

 Rivulariaceae, 82, 84. 

 Robinia, 431, 434, 492. 

 Rock-weed (seealso " Fucus"),20, 65,130. 

 Roestelia (see " Gymnosporangium "). 

 Romneya, 429. 

 Root, 10, 14, 15, 18, 19, 27, 28, 195, 241, 



252, 260, 261, 284, 301, 308, 314, 328, 



336, 363, 378, 410, 463; aerial (see 



"Aerial root"); Angiosperms, 363; 



Azolla, 284 ; Conifers, 336 ; Cycas, 328 ; 



Dicotyledons, 410; Equisetum, 301; 



Ferns, 260, 261 ; Isoetes, 318 ; Lycopo- 



dium, 308 ; modified roots, 28 ; Selagi- 



nella, 314. 

 Root-cap, 27. 



Root-fungi (see " Mycorhiza ") . 

 Root-hair, 28, 205, 213, 4(54, 465 ; Junger- 



manniales, 213 ; Marchantiales, 205. 

 Root-tendril, 29. 

 Root-tubercle, 3, 76, 477, 510. 

 Rosacese, 423, 432, 433, 444. 

 Resales, 424, 431, 444. 

 Rose-mildew (see " Sphaerotheca ") . 

 Rose, Rosa, 22, 25, 30, 49, 355, 409, 424, 



432; R. blanda, Fig. 422; R. livida, 



'.'"> ; A'. rul>i</inosa, Fig. 32. 

 Rosiflorae, 4'_':;. 

 Rosineae, 444. 

 Rotation of protoplasm, 40, 117. 



