Isocoma

Jimmyweed, goldenweed
Isocoma acradenia
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Tribe: Astereae[1]
Genus: Isocoma
Nutt. 1840
Synonyms[1]

Haplopappus sect. Isocoma (Nutt.) H.M.Hall

Isocoma commonly called Jimmyweed or goldenweed,[2] is a genus of North American semi-woody shrubs in the sunflower family. It is found in the semi-arid areas of Southwestern United States and Mexico.[3][4][5]

The name of this genus is derived from the Greek for "equal hair" referring to the pappus on the seed.[2]

Isocoma species are used as food plants by the larvae of some Lepidoptera species including Schinia bicuspida (recorded on I. drummondii), Schinia erosa (feeds exclusively on I. acradenia) and Schinia tertia (recorded on I. pluriflora).

Species[1][6][7][8]
  1. Isocoma acradenia (Greene) Greene - alkali goldenbush, alkali jimmyweed - Baja California, Sonora, California Arizona Nevada Utah
  2. Isocoma arguta Greene - Carquinez goldenbush - Solano County in California
  3. Isocoma azteca G.L.Nesom - Aztec goldenbush - Arizona New Mexico
  4. Isocoma coronopifolia (Gray) Greene - common goldenbush, goldenweed - southern Texas, Coahuila, Nuevo León, Tamaulipas
  5. Isocoma drummondii (Torr. & Gray) Greene - Drummond's goldenbush, Drummond's jimmyweed - southern Texas, Tamaulipas
  6. Isocoma felgeri G.L.Nesom - Sonora
  7. Isocoma gypsophila B.L.Turner - Zacatecas, Nuevo León
  8. Isocoma hartwegii (A.Gray) Greene - San Luis Potosí, Zacatecas, Guanajuato
  9. Isocoma humilis G.L.Nesom - Zion goldenbush - Utah (Kane + Washington Cos)
  10. Isocoma menziesii (Hook. & Arn.) G.L.Nesom - Menzies' goldenbush - Baja California, California
  11. Isocoma pluriflora (Torr. & Gray) Greene - rayless goldenrod, southern goldenbush, southern jimmyweed - Texas New Mexico Arizona Chihuahua
  12. Isocoma rusbyi Greene - Rusby's goldenbush - Arizona New Mexico Utah Colorado
  13. Isocoma tehuacana G.L.Nesom - Puebla
  14. Isocoma tenuisecta Greene - burrow goldenweed, burroweed - Arizona New Mexico
  15. Isocoma tomentosa G.L.Nesom - Chihuahua
  16. Isocoma veneta (Kunth) Greene - jimmyweed - Mexico from Coahuila to Oaxaca

References

  1. 1 2 3 Flann, C (ed) 2009+ Global Compositae Checklist
  2. 1 2 116573 Flora of North America Vol. 20 Page 439 Jimmyweed, goldenweed, Isocoma Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 320. 1840.
  3. ↑ Nuttall, Thomas. 1840. Transactions of the American Philosophical Society, new series 7: 320 in English
  4. ↑ Tropicos, Isocoma Nutt.
  5. ↑ Everitt, J.H.; Lonard, R.L.; Little, C.R. (2007). Weeds in South Texas and Northern Mexico. Lubbock: Texas Tech University Press. ISBN 0-89672-614-2
  6. ↑ Biota of North America Program 2013 county distribution maps
  7. ↑ The Plant List search for Isocoma
  8. ↑ Nesom, G.L. 1991. Taxonomy of Isocoma (Compositae: Astereae). Phytologia 70(2): 69–114 includes descriptions and distribution maps for 15 species
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