Sherardia, 313, 463. 
Sicyos, 275. 
Sida, 270. 
Sidastrum, 270. 
Siphonoglossa, 500. 
Sipolisia , 89. 
Sisymbrium, 76, 186, 275. 
Smilacina, 466. 
Smilax, 242, 301, 419, 537- 
Sobralia, 88, 500. 
Solanum, 464. 
Solidago, 26, 27, 120, 236, 310, 311, 464. 
Sparganium, 176, 266, 496. 
Spergularia, 46. 
Sphaeralcea, 270. 
Sphaerangium, 267. 
Sphaerocephalus 267, 
Sphaerophorus, 393. 
Sphaeroplea, ie 
Sphaerozosma, 286. 
Sphenopteris, ¢93. 
Spireea, 262, 491. 
Spirogyra, 410. 
Spirotznia, 286. 
Sporledera, 343, 344, 346) 348, 349, 351) 352, 367- 
Sporodesmium, 128. 
Stachys, 382. 
Staurastrum, 288, 289, 290, 291, 463. 
Steironema, 264, 265, 316, 460, 536. 
Stellaria, 381. ~ 
Stenophyllus, 29, 30, 134. 
Stenotus, 274. 
Stephaniella, 135. 
Stereocaulon, 392. 
_Stereodon, 268. 
Sticta, 391. 
Strobilites, 233. 
Struthanthus, 500. 
Stylosanthes, 116. 
Synchytrium, 381. 
Synthyris, 274. 
lymus, 40, 
Thysananthus, 383, 465. 
Tigridia, 273. 
Tillandsia, 177, 237. 
IX es 
Tolyposporium, 317, 416. 
Torreya, 413. 
Tortula, 273. 
Trentepholia, 238. 
Tricalycites, 62, 63, 65. 
Trichia, 186. 
Trichilia, 87, 499- 
Trichocentrum, 500, 
Trichocolea, 489. 
Trichomanes, 88, 536. 
Trichostema, 483. 
Trifolium, 47, 114, 176, 302, 465. 
Trillium, 88, 417, 464, 496, 536. 
Triticum, 327, 322, 331, 381. 
Tropidocarpum, 535. 
Trypethelium, 395. 
Tsuga, 76, 157, 160, 501. 
Tubercularia, 385. 386, 387, 388, 501. 
Tuckermania, 278. 
Tussilago, 497. 
Typha, 63, 65. 
Tysonia, 233, 293- 
Ulmaria, 49. 
Ulmus, 89, 536. 
Ulota, 65, 144, 152, 158, 159, 185, 273- 
Umbilicaria, 390, 391- 
Uniola, 229, 230, 317- 
Uredo, 416. 
Urocystis, 128. 
Uromyces, 45, 276, 311, 499- 
Usnea, 399. 
Ustilago, 317- 
Utricularia, 26, 236. 
Vaccinium, 24, 31, 121. 
Vanilla, 186 
Verbena, 496. 
Veronica, 122. 
Viburnum, 54, 59, 64, 306. 
Vicia, 444, 445, 4552 450, 458. 
Vigna, 237. \ 
Viola, 48, 234, 464. 
Weissia, 65, 68, 159, 185, 267, 273- 
Wulfenia, 274. ‘ 
Xanthidium, 289, 2gt. 
Spemnramcal age 
Xylographa, 393. 
Xyris, 300, 465. 
Yucca, 237. 
Zamiostrobus, 233. 
Zamites, 233, 271. 
Zanthoxylum, 133. 
Zea, 227, 319, 522. 
Zizyphus, 58, 64, 65. 
ria, 23. 
Zygodon, 69. 
