Crusea (common name saucer flower) is a genus of angiosperms (flowering plants) in the family Rubiaceae. 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.

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

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