From Plant Press, Vol. 26, No. 1, January 2023.
By Paul M. Peterson and Konstantin Romaschenko
Paul Peterson, Research Botanist and Curator, has been collaborating with botanists in México for more than 37 years on taxonomic, biogeographic, and evolutionary studies of the grasses. This past fall, from 15 October to 16 November 2022, Peterson and Konstantin (Kostya) Romaschenko, Research Associate, traveled to Central México to collect specimens for numerous ongoing projects principally involving Dr. Yolanda Herrera Arrieta at Instituto Politécnico Nacional, CIIDIR Unidad Durango-COFAA in Durango and Dr. Jesus Valdés Reyna at the Universidad Autónoma Agraria Antonio Narro in Saltillo.
The flora of México is extremely diverse, and the country ranks fourth in the world with more than 30,000 different species of flowering plants, compared to only 18,000 in the USA and 12,000 in all of Europe. The Poaceae or Gramineae are also diverse in México with more than 1,300 species. Peterson has traveled and collected more than 13,500 numbers in México on 28 expeditions, beginning in 1983 and 1984 with Robert F. Thorne and Carol Annable to the Sierra Juarez and Sierra de San Pedro Mártir in Baja California, and then throughout México in 1985 and 1986 to gather material of the annual species of Muhlenbergia in the tribe Cynodonteae for his PhD studies. If you want to work on grasses Muhlenbergia is a good choice because it is the most speciose genus in México with 130 species. The National Museum of Natural History’s previous Curator of grasses, Thomas Soderstrom worked on the tall perennial species of Muhlenbergia (subg. Trichochloa) for his PhD studies.