- young Leucocoprinus sp. in Isla Escondida, Putumayo
- yellow Pluteus sp. growing in Charguayaco near Pitalito, Huila
- Xylaria sp., young telemorph and possibly its anamorph growing in San Agustin
- Xylaria comosa? in Isla Escondida
- Xylaria comosa? in Isla Escondida
- Xerula / Dactylosporina sp. seen at the top of the Cascadas Fino del Mundo near Mocoa
- Xeromphelina tenuipes group growing in San Agustin Archelogical Park, Huila
- Xeromphelina tenuipes group in San Agustin Archelogical Park, Huila
- Woman Statue in San Agustín
- whitish Mycena sp. with yellow stem seen in Isla Escondida, Putumayo
- We called this Selaginella willdenowii the "Walmart" fern, since its color looked so plastic,Isla Escondida
- We called this Selaginella wildenowii spikemoss, the "Walmart fern" since it has such a plastic looking green-blue color that my camera did not do justice too. Seen in Isla Escondida
- Tylopilus obscurus, a mild tasting bolete growing with Trigobalanus excelsa in Charguayaco
- Tylopilus obscurus showing its white tubes in Charguayaco
- Tubifera microsperma Slime mold seen in San Agustin
- Tubifera microsperma Slime mold seen in San Agustin
- Trigonobalanus excelsa forest remnants in Charhuagaco
- Trigobalanus excelsa forest above Charguayaco
- Tremella looking like a cubist sculpture seen in Mocoa -
- Tremella fuciformes growing out of a banch in Mocoa