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 | |
|---|---|
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| 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 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
    
- USDA plants profile, Crusea diversifolia
 - Diederich Franz Leonhard von Schlechtendal & Ludolf Karl Adelbert von Chamisso. 1830. Linnaea 5(1): 165
 - 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.
 
External links
    
- Crusea in the World Checklist of Rubiaceae
 - Vascular Plants of the Gila Wilderness, Western New Mexico University
 - Irekani, Universidad Nacional Autónoma de México
 - Gardening Europe
 - Photo of herbarium specimen at Missouri Botanical Garden, isotype of Crusea wrightii var. angustifolia, collected in Guerrero
 
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