Synonyms: Dicaeoma smilacis, Persooniella smilacis.
Puccinia smilacis is a rust fungus that infects plants in the Smilax genus, commonly known as greenbriers. In East and Central Texas, it has been found on Smilax bona-nox and Smilax smallii, causing yellow to orange spores to form on the underside of leaves. The fungus is typically active from May to October, with peak infection occurring during the summer months. It is widely distributed in the region, particularly in wooded areas and along streams, where its host plants are common.
Rust fungus Puccinia smilacis on greenbrier leaves under a microscope, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022
Urediniospores of rust fungus Puccinia smilacis on greenbrier leaves under a microscope, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022
Greenbrier leaves with rust fungus Puccinia smilacis, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022
Underside of greenbrier leaves with rust fungus Puccinia smilacis, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022
Close-up of a greenbrier leaf with rust fungus Puccinia smilacis, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022
Urediniospores of rust fungus Puccinia smilacis on greenbrier leaves under a microscope, collected on Richards Loop Trail in Sam Houston National Forest. Texas, March 9, 2022Observations of the fungus Puccinia smilacis in East and Central Texas revealed its presence on greenbrier leaves. Under a microscope, the rust fungus was visible on leaves collected from Richards Loop Trail in Sam Houston National Forest on March 9, 2022. Urediniospores were observed on both the top and underside of infected leaves. Close-up examinations showed the fungus's impact on leaf structure. The observations highlighted the characteristics of Puccinia smilacis, including its microscopic features and effects on greenbrier leaves. Multiple collections from the same location demonstrated the consistency of the fungus's appearance and behavior. The findings provided detailed insights into the morphology and distribution of Puccinia smilacis in East and Central Texas, specifically on greenbrier hosts. The data contributed to a better understanding of this rust fungus in the region.
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