774 



INDEX. 



Ranunculus 



var. angustifolius Engelm., 



498 

 var. Lindheimeri Engelm., 



499 



trachophyllus Chaix., 461 

 tridentatus H.B.K., 503 

 trifolius Moench., 469 

 triternatus Gray, 488 

 Turner! Greene, 481 

 Unalaschensis Bess., 498 

 uncinatus D. Don, 487 

 unguiculatus Greene, 494 

 vagans Wats., 497 

 vicinalis Greene, 483 

 Raphidium, 28, 6n 



polymorphum Fresen. var. acic- 

 ulare (A. Br. ) Rabenh., 611, 

 617 

 var. falcatum ( C o r d a ) 



Rabenh., 612, 617 

 var. sigmoidea, 617 

 Raphidostegium recurvans L- and J., 



50 

 Ratibida columnaris (Sims) D. Don, 



367, 413. 597 



pinnata (Vent.) Barnhart, 413 

 Razoumofskya, 170 



robusta (Engelm.) Kuntze, 169, 



173 



Rhabdoweisia denticulata B. S., 37 

 Rhamnacese, 78, 116, 396 

 Rhamnus, 119 



alnifolia L'Her., 548 



purshiana DC., 78, 85, 87, 118, 



130, 131, 132, 133 

 Rhodomenia, 205, 206 

 Rhodymenia, 206 



palmata, 206 



pertusa, 206 



peruviana, 206 

 Rhns, 566 



glabra L-, 363, 367, 395- 56 



hirta (L.) Sudw., 395 



radicans L., 358, 367, 395, 543 

 Ribes, 558 



cynosbati L., 363, 390, 558 



floridum L'Her., 363, 390, 425, 558 



gracile Michx., 558 



rubrum L,., 549 



uva-crispa L,., 363, 390 



Ricinus, 88 

 Rinodina, 665, 662 



ascociscana Tuck., 259 



bischoffi (Hepp.) Kbr., 281, 297 



320, 669, 695 

 lecanorina Mass., 281, 282, 287, 



288, 320 

 nigra, 695 



oreina (Ach.) Mass., 224, 259, 278, 

 285, 287, 289, 319, 660, 664, 672, 

 6?3 694 



sophodes (Ach.) Nyl., 16, 259, 

 287, 288, 289. 304, 305, 319, 

 659, 664 



var. atrocinerea Nyl., 695 

 var. confragosa Nyl., 230, 259 

 var.'exigua Fr., 305, 320, 664, 



695 



var. tephraspisTuck., 280, 320 

 Rivularia biasolettiana Menegh., 27 

 Rivulariaceae Rabenhorst, 27 

 Robinia pseudacacia Linn., 75, 84, 87, 



109, 130, 131, 132, 133 

 Rodhymenia, 206 



Roripa hispida (Desv. ) Britton, 582 

 nasturtium (L,. ) Rusby, 360, 389 

 palustris (L. ) Bess., 389, 582 

 Rosa, 553, 554 



acicularis Lindl., 554 

 arkansana Porter, 20, 21, 391, 584 

 blanda Ait, 391, 554 

 Rosacese, 390, 583 

 Rubiacese, 83, 89, 130, 407, 592 

 Rubus, 552 



canadensis L,., 390, 552 

 hispidus L-, 424, 553 

 occidentalis L,., 363, 366, 390 

 strigosus Michx., 552, 553, 583 

 villosus Ait., 363, 366, 390, 552 

 Rudbeckia hirta L/., 412, 597, 627 



laciniata L., 361, 363, 413, 426, 



543, 597 



triloba L., 361, 363, 368, 412 

 Rutnex, 138, 146, 550, 627 



acetosella L., 137, 361, 384 

 britannica I/., 547, 550 

 crispus L,., 361, 384, 547, 579 

 hydrolapathum, 547 

 obtusifolius, 199, 547 

 occidentalis S. Wats., 569, 578 

 persicarioides L,., 579 



