inexpansa, 484 



intermixta, 474 



macra, 475 



macrostachya, 471 



microcarpa, 484, 487 



mixta, 484 



nivea, 467 



obliterata, 489 



oligantha, 478 



perplexa, 487 



Plankii, 481 



plumosa, 478 



pusilla, 473 



rariflora, 481 



schoenoides, 484 



semiplumosa, 478 

 Rhyncospora, 469 

 Ribes, 1008 



americanum, 1010 



aureum, 1010 



inerme, 1010 



mogollonicum, 1011 



Wolfii, 1011 

 Ribwort, 1534 

 Riccia fluitans, 578 

 Ricciacarpus natans, 578 

 Rice, 10, 271 



-cutgrass, 274 

 Richweed, 792 

 Ricinus, 1082 

 Rio Grande cottonwood, 



745 

 Rio Grande vervain, 1400 

 River 



-birch, 779 



-bulrush, 349 



-w^alnut, 773 



-weed, 994 

 family, 993 

 Riverbank grape, 1110 

 Robin's-plantain, 1627 

 Rock 



-cress, 964 



-jasmine, 1284 



-loving oxy trope, 1063 

 Rocket 



purple-, 964 



sea-, 981 



yellow-, 981 

 Rocky Mountain beeplant, 



988 

 Rocky Mountain 



columbine, 917 

 Rompevientos, 1149 

 Rorippa, 9, 971 



curvisiliqua, 976 



hispida, 976 



islandica, 976 

 Fernaldiana, 976 

 hispida, 976 



islandica, 976 



Nasturtium-aquaticum, 

 971, 974 



obtusa, 976, 979 



paliistris, 976 



ramosa, 979 



sessiliflora, 974 



sinuata, 974 



sphaerocarpa, 976 



teres, 979 



Waited, 979 

 Rosa, 1038, 1369 



arizonica, 1038 



Fendleri, 1038 



Woodsii 



Fendleri, 1038 

 Rosaceae, 999, 1015 

 Rose, 1038 



family, 1015 



-gentian, 1313 



mallow-, 1121 



-mallow, 1117 

 halberd-leaved-, 1118 

 scarlet-, 1118 

 swamp-, 1121 

 woolly-, 1121 



-pink, 1315 



-pogonia, 5, 716 



-sundrops, 1197 

 Rosemary, marsh, 1295 

 Roseroot, 997 

 Rosita, 1317 

 Rotala. 1164 



dentifera, 1164 



ramosior, 1164 

 interior, 1164 

 ramosior, 1164 

 Rough 



-butterweed, 1555 



-leaf dogwood, 1266 



-skullcap, 1412 

 Round-fruited toad rush, 



618 

 Roundleaf mint, 1443 

 Royal fern, 51 

 Rubiaceae, 1538 

 Rubus, 1035, 1369 



abundiflorus. 1036 



argutus, 1036 



arizonensis, 1036 



arvensis, 1036 



largus, 1037 



louisianus, 1036 



oklahomus, 1036 



oligospermus, 1036 



putus, 1037 



ramifer, 1036 



texanus, 1036 



valentulus, 1037 

 Rudbeckia, 1651 



amplexicaulis, 1655 



Coryi, 1652 



divergens, 1651 



flexuosa, 1651 



Fulgida 



palustris, 1652 



hirta, 1651 



angustifolia, 1651 

 pulcherrima, 1651 



laciniata, 1652 



maxima, 1652 



serotina, 1651 



subtomentosa, 1652 

 Ruellia, 1527 



ciliosa, 1527 



humilis, 1527 



depauperata, 1528 

 expansa, 1528 

 frondosa, 1528 

 longiflora, 1528 



strepens, 1527 

 cleistantha, 1527 

 strepens, 1527 

 Rulac Negundo, 1104 

 Rumex, 797, 798 



Acetosella, 798 



alluvius, 805 



altissimus, 801 



Berlandieri, 802 



californicus, 801 



chrysocarpus, 801, 802 



conglomeratus, 805 



crispus, 802, 805 



ellipticus, 801 



Engelmannii, 800 



fueginus, 807 



hastatulus, 800 



hymenosepalus, 797 



Langloisii, 802 



maritimus, 807 

 fueginus, 807 



mexicanus, 802 



obtusifolius, 805 



occidentalis, 802 



pulcher, 805 



spiralis, 801 



stenophyllus, 805 



triangulivalvis, 802 



utahensis, 801 



verticillatus, 800 



violascens, 807 

 Running box, 1551 

 Running fleabane, 1629 

 Ruppia, 6, 9, 123 



maritima, 123 

 Ruppiaceae, 123 

 Rush, 3, 5, 606 



family, 604 



-pea, 1045 

 Russian thistle, 839 



1768 



