- Trigobalanus excelsa forest above Charguayaco
- Trigonobalanus excelsa forest remnants in Charhuagaco
- Tubifera microsperma Slime mold seen in San Agustin
- Tubifera microsperma Slime mold seen in San Agustin
- Tylopilus obscurus showing its white tubes in Charguayaco
- Tylopilus obscurus, a mild tasting bolete growing with Trigobalanus excelsa in Charguayaco
- Woman Statue in San Agustín
- Xeromphelina tenuipes group in San Agustin Archelogical Park, Huila
- Xeromphelina tenuipes group growing in San Agustin Archelogical Park, Huila
- Xerula / Dactylosporina sp. seen at the top of the Cascadas Fino del Mundo near Mocoa
- Xylaria sp., young telemorph and possibly its anamorph growing in San Agustin
- yellow Pluteus sp. growing in Charguayaco near Pitalito, Huila