Isocoma rusbyi explained

Isocoma rusbyi, the Rusby's goldenbush or Rusby's jimmyweed^[1] is a North American species of plants in the family Asteraceae.

Distribution

It has been found in the States of Arizona, Utah, New Mexico, and Colorado in the southwestern United States. Some of the populations lie inside Grand Canyon and Petrified Forest National Parks, others in the Glen Canyon National Recreation Area.^{[2] [3] [4]}

Description

Isocoma rusbyi is a shrub up to 90 cm (3 feet) tall. Each flower head contains about 19-25 disc flowers but no ray flowers.^{[2] [5]}

Notes and References

1. Web site: NatureServe . Isocoma rusbyi . 7 October 2023 . Arlington, Virginia . 2023.
2. https://www.biodiversitylibrary.org/page/12981103#page/3/mode/1up Nesom, G.L. 1991. Taxonomy of Isocoma (Compositae: Astereae). Phytologia 70(2): 69–114
3. http://bonap.net/MapGallery/County/Isocoma%20rusbyi.png Biota of North America Program 2014 county distribution map
4. http://swbiodiversity.org/seinet/taxa/index.php?taxon=4001 SEINet, Southwestern Biodiversity, Arizona chapter
5. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250067015 Flora of North America, Isocoma rusbyi Greene, 1906. Rusby’s jimmyweed