Solidago, commonly called goldenrods, is a genus of about 100 to 120 species of flowering plants in the family Asteraceae. Most are herbaceous perennial species found in open areas such as meadows, prairies, and savannas. They are mostly native to North America, including Mexico; a few species are native to South America and Eurasia. Some American species have also been introduced into Europe and other parts of the world.
Oclemena is a small genus of North American flowering plants in the tribe Astereae within the family Asteraceae.
The Heliantheae are the third-largest tribe in the sunflower family (Asteraceae). With some 190 genera and nearly 2500 recognized species, only the tribes Senecioneae and Astereae are larger. The name is derived from the genus Helianthus, which is Greek for sun flower. Most genera and species are found in North America and South America. A few genera are pantropical.
The Gnaphalieae are a tribe of flowering plants in the family Asteraceae. It is most closely related to the tribes Anthemideae, Astereae, and Calenduleae.
Symphyotrichum is a genus of over 100 species and naturally occurring hybrids of herbaceous annual and perennial plants in the composite family, Asteraceae, most which were formerly treated within the genus Aster. The majority are endemic to North America, but several also occur in the West Indies, Central and South America, as well as one species in eastern Eurasia. Several species have been introduced to Europe as garden specimens, most notably New England aster and New York aster.
Isocoma, commonly called jimmyweed or goldenweed, is a genus of North American semi-woody shrubs in the family Asteraceae. It is found in the semi-arid areas of Southwestern United States and Mexico.
Gundlachia, commonly called goldenshrub, is a genus of flowering plants in the family Asteraceae.
Laennecia or Laënnecia is a genus of flowering plants in the family Asteraceae. The plants are native to Mesoamerica, South America, and the southwestern United States. Common name is "horseweed."
Lorandersonia, commonly called rabbitbush, is a genus of North American flowering plants in the family Asteraceae.
Neonesomia is a genus of North American flowering plants in the aster tribe within the sunflower family.
Nestotus is a genus of flowering plants in the family Asteraceae.
Toiyabea is a genus of North American plants in the aster tribe within the daisy family. The genus is named for the Toiyabe Mountains in the US state of Nevada. The only known species is Toiyabea alpina, the alpine serpentweed, native to the Toiyabe and Toquima Mountains of central Nevada.
Tonestus, common name serpentweed, is a genus of North American flowering plants in the family Asteraceae.
Xanthisma, common name sleepy-daisy, is a genus of flowering plants in the family Asteraceae.
Xanthocephalum is a genus of North American plants in the tribe Astereae within the family Asteraceae.
Xylothamia, the desert goldenrods, is a genus of flowering plants in the family Asteraceae. Until 2003, it was held to contain nine species of shrubs native to deserts of Mexico and the southwestern United States. However, it seems to contain at least two groups. Four species are related to Gundlachia and may be moved to that genus. Plants of the World Online class it as a synonym of Gundlachia. The relationships of the other five species is not quite as clear. All nine species do belong in the subtribe Solidagininae.
John Cameron Semple is a botanist, cytotaxonomist, professor emeritus, and adjunct professor at the University of Waterloo in Ontario, Canada. He was born in Boston and earned a degree of Bachelor of Science in 1969 from Tufts University, followed in 1971 and 1972 by Master of Arts and Doctor of Philosophy degrees from Washington University in St. Louis. Semple is known for his work with members of the tribe Astereae, particularly goldenrods, American asters, and goldenasters, and he maintains the University of Waterloo Astereae Lab website. Semple's wife is Brenda, and in 2013, he named a newly discovered goldenrod species Solidago brendiae in honor of her.
