xi 
Rhexia, 145, 150, 238. | Sisyrinchium, 375, 385- 
Rhizophidium, 52, 283. | Smilax, 113, 114, 144, 1465 179. 
Rhizosolenia, 174, 275- | Solanum, 112, 238, 279, 285, 412, 413, 481, 521. 
Rhododendron, 287. Solidago, 145, 147, 152, 182, 338, 368, 369, 393, 461, 
Rhoikosphenia, 274. | 519. 
Rhus, 54, 285, 338) 339, 392, 4175 443» 444, 482. | Solorina, 245, 497. 
Rhynchosia, 143, 149, 150, 238, 458, 459- | Sorosporium, 363, 443- 
Rhynchospora, 144. | Sparassis, 207, 208, 286. 
Rhynchostegium, 469. | Spathyema, 106. 
Ribes, 54, 91, 136, 137, 285, 338. | Specularia, 192,405, 406. 
Riccia, 402. | Spergularia, 324, 325, 405- 
Richardia, 15t, 382. | Spiesia, 138, 405, 406. 
Ricinus, 383, 469. Spiraea, 237. 
Rinodina, 249. | Spiranthes, 158, 380, 405, 406. 
Rivularia, 426, 427, 482. | Spirogyra, 185. 
Roripa, 186, 187, 405, 460. | Sphaeralcea, 364. 
Rosa, 122. Sphaerella, 82, 176, 288. 
Rosellinia, 439, 479- | Sphaerophorus, 259. 
Rubus, 150, 460, 471. | Sphagnum, 92, 344, 346, 442, 443- 
Rudbeckia, 139, 378- | Sporobolus, 55, 143, 463, 464, 405, 518. 
Rumex, 44, 92, 137, 237» 33° 367) 444» 480, 482. Sporotrichum, 237. 
Ruppia, 426. | Stachys, 177, 461. 
Russula, 477. | Statice, 405, 406. 
Staurastrum, 294, 295, 297, 298- 
Sabal, 146, 147. Stauroneis, 265, 274. 
Sabbatia, 393. Stemona, 3. 
Sagedia, 259. | Stellaria, 171, 324, 405. 
Sagittaria, 105, 106, 287, 330, 364. | Stenophyllus, 143, 161, 238. 
Salix, 90, 383, 385, 462, 482, 521. | Stenorrhynchus, 158. 
la, 54, 92, 135, 130, 138, 187, 188, 417,466, 481. | Stenosiphon, 393. 
Salvinia, 462. Stephanodoria, 186. 
Sambucus, 151, 444. | Stephanogonia, 174. 
Samolus, 137. | Stephonopyxis, 174. 
* Sanguinaria, 89, 287. Stereocaulon, 249. 
Sanguisorba, 405. Stereum, 82. 
Sanicula, 237, 35t» 352s 353» 354» 355» 356, 3579 358, | Sticta, 245, 495s 496, 497» 498, 499» 509. 
359, 360, 361, 442. Stictina, 495, 496, 497, 498. 
Saracha, 483. Stictodiscus, 174. 
Sassafras, 177, 225, 226, 283. Stigonema, 444. 
Saussurea, 350. Stillingia, 143, 392- 
Savastana, 405, 406. Stipa, 423, 49, 481. 
Saxifraga, 58, 137- Stipulicida, 148, 238. 
Scabiosa, 171. Stropharia, 204, 286, 489- 
Scaevola, 436. Streptanthus, 338. 
Scenedesmus, 427, 439. Surirella, 265, 275, 374- 
Schinus, 186. Sweetia, 500. 
Schistidium, 65, 66. Symploca, 428. 429, 439. 
Schizaea, 169, 441. | Synchytrium, 89. 
- Schizophyllum, 439, 479- | Synedra, 265, 275- 
Schizostega, 478. | Syntherisma, 420. 
Schizothrix, 429. | Syrrhopodon, 442. 
Schoenocaulon, 439- Systegium, 442. 
Scholecotrichum, 178, 288. : 
Schollera, 497 461. Tabellaria, 275- is 
+ 30s 37s 38, 39+ 49, 41, 425 43» 135- Talinum, 107, 39%. 
Scirpus, 115. Taphrina, 178, 286. 
Scirrhia, 435. Taraxacum, 375- 
Sclerotina, 135. Taxodium, 92. 
se er open 446. Tayloria, 442. 
Scutellaria, 54 Tecoma, 177, 178. 
Scytonema, 428. Tephrosia, 25, 27, 28, 29» 30, 31, 32, 33» 34» 35» 51¥- 
Secotium, 492. 4 Terpsinoe, 265. 
Securidaca, 479. Tessela, 275. 
Sedum, 287. Tetracyclus, 266. 
ers 259. ‘Tetraedron, 140. 
enipedium, 520. Tetraploa, 179, 288. 
Senebiera, 324, 407. Teucrium, 54, 147- 
Senecio, 137, 186, 337, 375, 376- Thalictrum, 53, 474- 
onium, 333- Thamnolia, 194, 252- 
Septoria, 192, 437, 479- Thelephora, 492. 
4 Sequoia, 186, 375. Theloschistes, 242. 
Sericocarpus, 461. Thelotrema, 249- 
Sesuvium, 391, 392- Thermopsis, 186. 
. Setaria, 161, 175, 422, 423- Thryallis, 228. 
herdia, 121, 122, 324. Tiarella, 58. 
Sida, 137. Tibouchina, 339- 
Sigmatella, 442. Tilia, 278, 460. 
Sieglingia, 365, 407, 482. Tillaea, 138. 
Silene, 57, 460. Tillandsia, 158. 
Silybum, 405. Tilmadoche, 432, 433- 
Sinapis, 224. Tipularia, 462. 
Sisymbrium, 370, 385, 443, 477 Tissa, 186, 324, 405. 
