Lagascea

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Campanulids
Ordo: Asterales

Familia: Asteraceae
Subfamilia: Asteroideae
Tribus: Heliantheae
Subtribus: Helianthinae
Genus: Lagascea
Species: L. angustifolia – L. aurea – L. decipiens – L. helianthifolia – L. heteropappus – L. mollis – L. palmeri – L. rigida

Source(s) of checklist:
Name

Lagascea Cav., Anales Ci. Nat. 6: 331. 1803

Type species: Lagascea mollis Cav.

Synonyms

Lagasca Cav., alternate spelling
Nocca Cav.
Calhounia A.Nelson

References

Cav., Anales de Ciencias Naturales 6(18): 331–333, pl. 44. 1803.

Links

International Plant Names Index. 2018. Lagascea. Published online. Accessed: Feb. 09 2018.
The Plant List 2013. Lagascea in The Plant List Version 1.1. Published on the internet. Accessed: 2018 Feb. 09.
Tropicos.org 2018. Lagascea. Missouri Botanical Garden. Published on the internet. Accessed: 2018 Feb. 09.
Hassler, M. 2018. Lagascea. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2018. Species 2000 & ITIS Catalogue of Life. Published on the internet. Accessed: 2018 Feb. 09. Reference page.

Lagascea is a genus of flowering plants in the family Asteraceae.[2][3][4] It occurs primarily in Mexico, but some species extend into Central America and one reaches north into the western United States.[5] One species, L. mollis, has been widely introduced to other localities around the tropics and subtropics.

Lagascea is a member of the same subtribe Helianthinae as the common sunflower, Helianthus annuus, but it looks different because it has heads that are reduced to have 1 (or 2) flowers, and are clustered into compound units that mimic heads and are sometimes called syncephalia.[6] The relationships of Lagascea are not well established, but the published work from molecular phylogenetic studies places it as the sister genus to Tithonia.[7] Two of the species are herbs, distinguished from each other by features of the heads, and the remaining species are shrubs and are distinguished primarily by vegetative features.

The genus is named after the Spanish botanist Mariano Lagasca (1776-1839).[8]

Species[1][9][10]

Lagascea agustifolia D.C. - Guanajuato, Guerrero, Jalisco, México State, Morelos, Zacatecas, Nayarit, Sinaloa
Lagascea aurea Stuessy - Michoacán
Lagascea decipiens Hemsl. - Arizona (Pima + Santa Cruz Counties),[11] Mexico (from Sonora to Oaxaca)
Lagascea helianthifolia H.B.K. - Mexico + Central America from Tamaulipas to Nicaragua
Lagascea heteropappus Hemsl. - Guerrero, México State, Michoacán
Lagascea mollis Cav. - Mexico + Central America
Lagascea palmeri (B. Rob.) B. Rob. - Michoacán, Colima
Lagascea rigida (Cav.) Stuessy - Guerrero, México State, Morelos, Puebla, Distrito Federal

References

Flann, C (ed) 2009+ Global Compositae Checklist Archived 2014-12-12 at archive.today
Cavanilles, Antonio José. 1802. Anales de Ciencias Naturales 6(18): 331–333 in Spanish
Cavanilles, Antonio José. 1802. Anales de Ciencias Naturales 6(18): plate 44 line drawing of Lagascea mollis
Tropicos, Lagascea Cav.
Stuessy, T. F. 1978. Revision of Lagascea (Compositae, Heliantheae). Fieldiana, Botany 38: 75–133.
Harris, E. M. 1994. Developmental evidence for the derivation of syncephalia in Lagascea (Heliantheae; Asteraceae). American Journal of Botany 81: 1139–1148.
Schilling, E. E. and J. L. Panero. 1996. Phylogenetic reticulation in subtribe Helianthinae. American Journal of Botany 83: 939-948.
Genaust, Helmut (1976). Etymologisches Wörterbuch der botanischen Pflanzennamen ISBN 3-7643-0755-2
The Plant List search for Lagascea
CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Capital Nat. México. CONABIO, Mexico City.
Biota of North America Program 2013 county distribution map