References

For Chaetopappa

Nesom, G.L. 2006y. Chaetopappa. In Flora of North America Editorial Committee. 2006b. Flora of North America north of Mexico. Volume 20, Magnoliophyta: Asteridae, part 6: Asteraceae, part 2. Oxford Univ. Press, New York, NY. 666 pp. Google Scholar

Nesom, G.L. 2021f. Recognition of Chaetopappa modesta (Asteraceae) in Texas and Tamaulipas. Phytoneuron 2021-35: 1-3. Published 16 August 2021. ISSN 2153 733X Google Scholar