Crusea

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