| Asteraceae |
Wollastonia |
Wollastonia biflora (C. Linnaeus) A.P. de Candolle |
Wollastonia biflora (L.) DC. |
4 |
| Asteraceae |
Wollastonia |
Wollastonia biflora var. biflora |
Wollastonia biflora (C. Linnaeus) A.P. de Candolle var. biflora |
1 |
| Apocynaceae |
Wrightia |
Wrightia R. Brown |
Wrightia |
|
| Apocynaceae |
Wrightia |
Wrightia sp. |
Wrightia sp. |
|
| Asteraceae |
Xanthium |
Xanthium C. Linnaeus |
Xanthium |
5 |
| Asteraceae |
Xanthium |
Xanthium strumarium C. Linnaeus |
Xanthium strumarium C. Linnaeus |
4 |
| Araceae |
Xanthosoma |
Xanthosoma H.W. Schott |
Xanthosoma |
|
| Araceae |
Xanthosoma |
Xanthosoma atrovirens K.H. Koch & C.D. Bouché |
Xanthosoma atrovirens C. Koch & Bouché |
2 |
| Araceae |
Xanthosoma |
Xanthosoma sagittifolium (C. Linnaeus) H.W. Schott |
Xanthosoma sagittifolium (L.) Schott |
1 |
| Olacaceae |
Ximenia |
Ximenia C. Linnaeus |
Ximenia |
|
| Olacaceae |
Ximenia |
Ximenia americana C. Linnaeus |
Ximenia americana C. Linnaeus |
3 |
| Olacaceae |
Ximenia |
Ximenia americana var. americana |
Ximenia americana L. var. americana |
2 |
| Olacaceae |
Ximenia |
Ximenia americana var. americana |
Ximenia americana Linné var. americana Linné |
1 |
| Olacaceae |
Ximenia |
Ximenia americana var. americana |
Ximenia americana var. americana |
8 |
| Haemodoraceae |
Xiphidium |
Xiphidium J.B. Aublet |
Xiphidium |
|
| Haemodoraceae |
Xiphidium |
Xiphidium caeruleum J.B. Aublet |
Xiphidium caeruleum Aubl. |
1 |
| Haemodoraceae |
Xiphidium |
Xiphidium caeruleum J.B. Aublet |
Xiphidium caeruleum J.B.C.F. Aublet |
|
| Grammitidaceae |
Xiphopteris |
Xiphopteris G.F. Kaulfuss |
Xiphopteris |
1 |
| Grammitidaceae |
Xyphopteris ? |
Xiphopteris G.F. Kaulfuss |
Xyphopteris ? |
1 |
| Grammitidaceae |
Xiphopteris |
Xiphopteris subcoriacea (E.B. Copeland) E.B. Copeland |
Xiphopteris subcoriacea |
3 |