Synonyms: Fusarium merismoides, Fusarium nicotianae, Fusarium oxysporum, Fusarium rimosum, Fusisporium rimosum.
Common name: deer vomit.
Fusicolla merismoides is an ascomycetous fungus that produces small, dark brown to black, meristem-like stromata on grasses and other herbaceous plants. In East and Central Texas, it has been found on various hosts, including little bluestem, big bluestem, and switchgrass, typically during the summer and fall months. The fungus forms elongated, multi-loculate stromata that can reach up to 10 mm in length, with perithecia embedded in a pseudoparenchymatous tissue. Ascospores are hyaline, filiform, and multiseptate, measuring 60-120 μm in length. Fusicolla merismoides is considered a relatively common fungus in the region, often associated with grasslands and open woodlands.
Orange, slimy substance slowly oozing from grapevine caused by fungus Fusicolla merismoides in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2021
23400 Park Rd 12, Washington, TX 77880, USA
Fusicolla orange slime fungus (Fusicolla merismoides) colonizing the sap that leaks from grapevine in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 202123400 Park Rd 12, Washington, TX 77880, USA
Orange slime caused by Deer Vomit fungus (Fusicolla merismoides) on oozing sap of grapevine in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 202123400 Park Rd 12, Washington, TX 77880, USA
Deer Vomit fungus (Fusicolla merismoides) on oozing sap of grapevine in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 202123400 Park Rd 12, Washington, TX 77880, USA
Fusicolla orange slime fungus (Fusicolla merismoides) on splashes of sap of grapevine in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 202123400 Park Rd 12, Washington, TX 77880, USA
Close-up of Deer Vomit fungus (Fusicolla merismoides) on oozing sap of grapevine in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 202123400 Park Rd 12, Washington, TX 77880, USA
Close-up of orange slime caused by Deer Vomit fungus (Fusicolla merismoides) on oozing sap of grapevine in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 202123400 Park Rd 12, Washington, TX 77880, USA
Texture of Fusicolla orange slime fungus (Fusicolla merismoides) on sap of grapevine in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 202123400 Park Rd 12, Washington, TX 77880, USA
Fusicolla orange slime fungus (Fusicolla merismoides) detaching with sap of grapevine in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 202123400 Park Rd 12, Washington, TX 77880, USA
Fusicolla orange slime fungus (Fusicolla merismoides) growing on sap of grapevine in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 202123400 Park Rd 12, Washington, TX 77880, USA
Fusicolla orange slime fungus (Fusicolla merismoides) with air bubbles on sap of grapevine in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 202123400 Park Rd 12, Washington, TX 77880, USA
Orange slime fungus Fusicolla merismoides on a tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, April 24, 2021Lone Star Hiking Trail, Montgomery, TX 77356, USAObservations of the fungus Fusicolla merismoides in East and Central Texas revealed its presence on grapevines and trees, characterized by an orange, slimy substance. The fungus was found colonizing sap leaks on grapevines at Washington-on-the-Brazos State Historic Site, with a texture that could detach with the sap. It also grew on splashes of sap and had air bubbles present in some cases. Additionally, Fusicolla merismoides was observed on a tree along Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest. The fungus was consistently orange in color and slimy in texture, with some instances showing a close-up of the fungus's texture and growth pattern. These observations were made in March and April 2021, suggesting the fungus is active during this time period in East and Central Texas.
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