Cent. Observ. Bot., no. 85. 1806
Illustrator: Linny Heagy
Phenology: Flowering Jul–Oct.
Habitat: Crevices, ledges, cliffs, other rocky sites in canyons, along streams, in desert grasslands, oak-agave, oak, oak-juniper, and pine-oak woodlands
Elevation: (900–)1200–1900 m
Habitat information came mostly from collections from Sonora and Chihuahua, Mexico. Ageratum corymbosum grows in all Mexican states except for the extreme southeast. It has been included in various summaries as occurring in Texas; as noted by D. S. Correll and M. C. Johnston (1970), those records apparently were based on a collection by Charles Wright from southwestern New Mexico.
Varieties and forms of Ageratum corymbosum have been recognized (e.g., M. F. Johnson 1971; R. McVaugh 1984). McVaugh wryly noted that extremes of these intergrading infraspecific entities “can be recognized with a little imagination.” The form that reaches the United States (with ovate-lanceolate leaves) is var. jaliscense.
|Author||Guy L. Nesom +|
|Common name||Flat-top whiteweed +|
|Distribution||Ariz. +, N.Mex. + and Mexico. +|
|Elevation||(900–)1200–1900 m +|
|Habitat||Crevices, ledges, cliffs, other rocky sites in canyons, along streams, in desert grasslands, oak-agave, oak, oak-juniper, and pine-oak woodlands +|
|Illustrator||Linny Heagy +|
|Phenology||Flowering Jul–Oct. +|
|Publication title||Cent. Observ. Bot., no. +|
|Publication year||1806 +|
|Source xml||https://email@example.com/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V19-20-21/V21 1211.xml +|
|Synonyms||Ageratum corymbosum var. jaliscense +, Ageratum salicifolium + and Ageratum strictum +|
|Taxon family||Asteraceae +|
|Taxon name||Ageratum corymbosum +|
|Taxon parent||Ageratum +|
|Taxon rank||species +|
|Volume||Volume 21 +|