Cylindrium elongatum is a species of fungus in the family Nectriaceae, order Hypocreales, class Sordariomycetes, phylum Ascomycota. It is characterized by its elongated, cylindrical conidia and holoblastic conidiogenesis. In East and Central Texas, Cylindrium elongatum has been found on decaying wood and plant debris in moist environments, often associated with riparian zones and floodplains. Its distribution in the region includes counties along the Brazos, Colorado, and Trinity rivers, where it typically fruits in late summer to early fall.
Mold fungus Cylindrium elongatum(?) on a rotting oak leaf under a log in wet area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 19, 2023
Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Whitish conidiophores of mold fungus Cylindrium elongatum(?) on a rotting oak leaf under a log in wet area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 19, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Cylindrical conidia (in Congo Red) of mold fungus Cylindrium elongatum(?) from a rotting oak leaf, collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 19, 2023
Cylindrical conidia (in lugol, low magnification) of mold fungus Cylindrium elongatum(?) from a rotting oak leaf, collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 19, 2023
Cylindrical conidia (in lugol) of mold fungus Cylindrium elongatum(?) from a rotting oak leaf, collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 19, 2023
Rod-shaped conidospores of mold fungus Cylindrium elongatum(?) from a rotting oak leaf, collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 19, 2023
Cylindrical conidia with parallel sides, rounded ends of mold fungus Cylindrium elongatum(?) from a rotting oak leaf, collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 19, 2023
Spore size 18.1 - 20 × 2 - 2.1 µm, length to width ratio Q = 8.14 - 9.9.
Cylindrical conidia (in Toluidine blue, low magnification) of mold fungus Cylindrium elongatum(?) from a rotting oak leaf, collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 19, 2023Observations of the fungus Cylindrium elongatum in East and Central Texas reveal its presence on rotting oak leaves in wet areas. The mold fungus was found under a log on Caney Creek Trail in Sam Houston National Forest, with whitish conidiophores visible on the leaf surface. Microscopic examination revealed cylindrical conidia with parallel sides and rounded ends, characteristic of Cylindrium elongatum. The conidia were observed using various stains, including Congo Red, Lugol, and Toluidine blue, which helped to confirm their shape and structure. Additionally, rod-shaped conidospores were also observed, further supporting the identification of the fungus as Cylindrium elongatum. These findings suggest that this fungus is adapted to decomposing organic matter in wet environments in East and Central Texas. The observations were made on January 19, 2023, in Montgomery, Texas.
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