In 1993, taxol was discovered as a natural product in a newly described endophytic fungus living in the yew tree.  It has since been reported in a number of other endophytic fungi, including Nodulisporium sylviforme ,  Alternaria taxi , Cladosporium cladosporioides MD2 , Metarhizium anisopliae , Aspergillus candidus MD3 , Mucor rouxianus sp. , Chaetomella raphigera , Phyllosticta tabernaemontanae , Phomopsis , Pestalotiopsis pauciseta , Phyllosticta citricarpa , Podocarpus , Fusarium solani , Pestalotiopsis terminaliae , Pestalotiopsis breviseta , Botryodiplodia theobromae Pat. , Gliocladium sp. , Alternaria alternata var. monosporus , Cladosporium cladosporioides , Nigrospora sp. , Pestalotiopsis versicolor , and Taxomyces andreanae . However, there has been contradictory evidence for its production by endophytes, with other studies finding independent production is unlikely.