Centrosema
Centrosema, the butterfly peas, is a genus of (mainly tropical) American vines in the legume family (Fabaceae). It includes 44 species, which range through the tropical and warm-temperate Americas from the southern United States to northern Argentina. Species include:
 Centrosema acutifolium 
 Centrosema angustifolium Benth. Centrosema arenarium Benth. Centrosema arenicola 
 Centrosema bellum 
 Centrosema bifidum 
 Centrosema brachypodum 
 Centrosema bracteosum 
 Centrosema brasilianum (L.) Benth. Centrosema capitatum 
 Centrosema carajasense 
 Centrosema coriaceum 
 Centrosema dasyanthum Benth. Centrosema fasciculatum 
 Centrosema grandiflorum 
 Centrosema grazielae 
 Centrosema haitense 
 Centrosema heptaphyllum 
 Centrosema heteroneurum 
 Centrosema jaraguaense 
 Centrosema kermesi 
 Centrosema latidens 
 Centrosema lucia-helenae 
 Centrosema macranthum Hoehne
 Centrosema macrocarpum 
 Centrosema molle 
 Centrosema pascuorum 
 Centrosema platycarpum 
 Centrosema plumieri (Turp. ex Pres.) Benth. Centrosema pubescens Benth. Centrosema rotundifolium 
 Centrosema sagittatum (Humb. & Bonpl. ex Willd.) Brandegee
 Centrosema schottii 
 Centrosema sericiflorum 
 Centrosema tapirapoanense 
 Centrosema teresae 
 Centrosema tetragonolobum 
 Centrosema triquetrum 
 Centrosema unifoliatum 
 Centrosema variifolium 
 Centrosema venosum 
 Centrosema vetulum 
 Centrosema vexillatum Benth. Centrosema virginianum 

Lepidopteran caterpillars that feed on butterfly peas include the two-barred flasher (Astraptes fulgerator), occasionally recorded on C. macrocarpum and C. plumieri at least. Another plant referred to as butterfly pea from the same subtribe Clitoriinae is the related Clitoria ternatea. However it doesn't belong to the genus Centrosema. In Jamaica, it is known as Fee Fee and is usually seen at Christmas time. The flower is able to make a whistling sound hence children  usually find it useful as a toy. See also
 Clitoria

Footnotes

References

 Brower, Andrew V.Z. (2006): Problems with DNA barcodes for species delimitation: ‘ten species’ of Astraptes fulgerator reassessed (Lepidoptera: Hesperiidae). Systematics and Biodiversity 4(2): 127–132. PDF fulltext
 Hébert, Paul D.N. ; Penton, Erin H.; Burns, John M.; Janzen, Daniel H. & Hallwachs, Winnie (2004): Ten species in one: DNA barcoding reveals cryptic species in the semitropical skipper butterfly Astraptes fulgerator. PNAS 101(41): 14812–14817. PDF fulltext Supporting Appendices
 United States Department of Agriculture (USDA) (2007): USDA Plants Profile: Centrosema. Retrieved 2007-DEC-17. Phaseoleae
Fabaceae genera