. Contributions from the United States National Herbarium. Botany. Checklist of the Plants of the Guiana Shield 583 Waltheria 532-533, 541 Warszewiczia 492, 497, 505 Webera417 Websteria 95, 97, 101-102 Weddellina 469 Wedelia 260, 266, 268 Weigeltia 434 Weinmannia 278-279 Werauhia 78, 81-83 Whittonia 456 Wikstroemia 537 Wilbrandia 277 Willoughbya 268-269 Willughbeja 203 Wilmattea 233 Windsorina 175 Wissadula 394-395 Witheringia 528-530 Wittiocactus 233 Wittmackanthus 492 Wittmackia 83 Wolffiall2 Wolffiellall2 Wolffiopsis 112 Wormskioldia 541 Wulffia 260-262, 267, 269 Wullschlaegelia 134, 148 Wu

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. Contributions from the United States National Herbarium. Botany. Checklist of the Plants of the Guiana Shield 583 Waltheria 532-533, 541 Warszewiczia 492, 497, 505 Webera417 Websteria 95, 97, 101-102 Weddellina 469 Wedelia 260, 266, 268 Weigeltia 434 Weinmannia 278-279 Werauhia 78, 81-83 Whittonia 456 Wikstroemia 537 Wilbrandia 277 Willoughbya 268-269 Willughbeja 203 Wilmattea 233 Windsorina 175 Wissadula 394-395 Witheringia 528-530 Wittiocactus 233 Wittmackanthus 492 Wittmackia 83 Wolffiall2 Wolffiellall2 Wolffiopsis 112 Wormskioldia 541 Wulffia 260-262, 267, 269 Wullschlaegelia 134, 148 Wurdackanthus 308 Wurdackia 109 Xanthosoma 63-64, 66 Xerorchis 134, 139 Ximenia 450 Xiphidium 109, 111 Xiphochaeta 260, 267 Xiphopteris 37-38 Xyladenius 304 Xylobium 134, 142, 148 Xylophragma217, 219 Xylopia 192-194 Xylosma 302-304 Xylosterculia 533 Xyris 179-181 Youngia 260 Yutajea 505 Yuyba 72 Zamia 56 Zantedeschia 66 Zanthoxylum 508-510 Zapoteca 369-370, 373 Zea 158, 162 Zephyranthes 113 Zeugites 158 Zexmenia 269 Zeyheria219 Zingiber 182 Zinowiewia 239 Ziziphus 477 Zollemia 356, 364 Zomia 356, 360, 364 Zostera 183 Zschokkea 203 Zuelania 302-304 Zygia 369-376 Zygopetalum 148-149 Zygophlebia 36-37, 49 Zygosepalum 134, 139, 143, 148-149 Zygostates 134. Rhynchospora cordatachenia M.T.Strong (Cypearaceae). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. National Museum of Natural History (U. S. ). Dept. of Botany; United States National Museum. Washington, DC : Dept. of Botany, National Museum of Natural History