470 



INDEX 



Rhamnus cathartica, 359 



Frangula, 96, 359 



Purshiana, 359 

 Rheum, 322 



officinale, 322 



palmatum, 321, 322 



tanguticum, 322 

 Rhinanthus, 392 

 Rhizoids, 283, 286, 290 

 Rhizome, defined, 139 

 Rhizopora, 410 

 Rhizopus, 249 



nigricans, 248 

 Rhododendron, 191 

 Rhodophyceae, 246 

 Rhodymenia palmata, 247 

 Rhoeadales, 332 

 Rhubarb, 322 

 Rhus, cotinus, 356 



fruit of, 209 



Glabra N. F., 356 



japonica, 356 



semialata, 356 



toxicodendron. 356 



typhina, 356 



venenata, 356 

 Ribes, 336 

 Riccia, 283, 409 

 Ricciocarpus, 409 

 Ricinus communis, 355 

 Rocella, 281 

 Rock Rose Family, 369 

 Root, defined, 121 



adventitious, 123 



anomalous, 123 



California Privet, 127-131 



cap, 121, 122 



classification as to form, 123 



conical, 123 



distinction from stem, 123 



duration of, 1 24 



epiphytic, 123 



functions, 121 



fusiform, 123 



Root, generative tissues of, 122 

 hairs, 121, 122 

 histology, 124-132 

 lateral, 123 

 primary, 123 

 secondary, 123 

 system, 133 

 tubercles, 132-135 

 Roots, Dicotyledon, 125 



abnormal structure in. 132 

 of parasitic plants, 1 23 

 of primary growth, 125, 126 

 of secondary growth, 126, 127 

 Monocotyledon, 124 

 multiple, 123 

 napiform, 123 

 nodule producing, 132 

 Rootlet, cross section of in region of 



root hairs, 122 

 Roridula, 335 

 Rosa canina, 341 

 centifolia, 341 

 gallica, 338 

 Rosa Gallica, 338 

 Rosaceae, 338 

 Resales, 336 

 Rose, 338 



Family, 338 



Rosette aggregates, 86, 87 

 Rosmarinus officinalis, 397 

 Rubber, 94 

 Rubi Fructus, 340 

 Rubi Idaei Fructus, 340 

 Rubiaceae, 398 

 Rubiales, 398 

 Rubus N. F., 338 

 cuneifolius, 338 

 Idaeus, 340 

 nigrobaccus, 338 

 strigosus, 340 

 villosus, 338 

 Rue Family, 349 

 Ruellia ciliosa, 395 

 Rumex N. F., 270 





