Crusea

Crusea (common name saucer flower)[1] is a genus of angiosperms (flowering plants) in the family Rubiaceae.[2] The genus is found in the south-western United States (Arizona and New Mexico), Mexico, and Central America. A few species are naturalized in Cuba and Puerto Rico.[3]

Crusea
Crusea longiflora
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Gentianales
Family: Rubiaceae
Subfamily: Rubioideae
Tribe: Spermacoceae
Genus: Crusea
Schltdl. & Cham.
Type species
Crusea rubra (syn. of Crusea hispida)

Species
  • Crusea andersoniorum Lorence – Oaxaca
  • Crusea calcicola Greenm – San Luis Potosí, Querétaro, Guerrero, Oaxaca, Honduras
  • Crusea calocephala DC. – widespread from Tamaulipas to Honduras
  • Crusea coccinea DC.
    • Crusea coccinea var. breviloba Loes. – from Sinaloa to Guatemala and Belize
    • Crusea coccinea var. chiriquensis W.R.Anderson – Costa Rica and Panama
    • Crusea coccinea var. coccinea – from Jalisco to Oaxaca
  • Crusea coronata B.L.Rob. & Greenm. – from Sonora to Oaxaca
  • Crusea diversifolia (Kunth) W.R.Anderson – widespread from Arizona and New Mexico to Guatemala
  • Crusea hispida (Mill.) Rob.
    • Crusea hispida var. grandiflora (Paul G.Wilson) W.R.Anderson – Guerrero, México State, Distrito Federal
    • Crusea hispida var. hispida – widespread across much of Mexico and naturalized in Cuba
  • Crusea longiflora (Roem. & Schult.) W.R.Anderson – widespread across much of Mexico and naturalized in Puerto Rico
  • Crusea lucida Benth. – Sonora, Sinaloa, Jalisco, Nayarit, Colima, Michoacán, Guerrero
  • Crusea megalocarpa (A.Gray) S.Watson – widespread across much of Mexico
  • Crusea parviflora Hook. & Arn. – widespread across much of Mexico, south to Nicaragua
  • Crusea psyllioides (Kunth) W.R.Anderson – widespread across much of Mexico
  • Crusea pulcherrima Borhidi & Salas-Mor. – Oaxaca
  • Crusea setosa (M.Martens & Galeotti) Standl. & Steyerm. – widespread across much of Mexico, south to Nicaragua
  • Crusea wrightii A.Gray
    • Crusea wrightii var. angustifolia W.R.Anderson – central and southern Mexico
    • Crusea wrightii var. wrightii – widespread across much of Mexico, north into Arizona

References
  1. USDA plants profile, Crusea diversifolia
  2. Diederich Franz Leonhard von Schlechtendal & Ludolf Karl Adelbert von Chamisso. 1830. Linnaea 5(1): 165
  3. Davidse, G., M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera. 2012. Rubiaceae a Verbenaceae. 4(2): i–xvi, 1–533. In G. Davidse, M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera (eds.) Flora Mesoamericana. Missouri Botanical Garden Press, St. Louis.
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