Sesbania



Sesbania is a genus of flowering plants in the pea family, Fabaceae, and the only genus found in tribe Sesbanieae. Riverhemp is a common name for plants in this genus. Notable species include the rattlebox (Sesbania punicea), spiny sesbania (Sesbania bispinosa), and Sesbania sesban, which is used in cooking. Plants of this genus, some of which are aquatic, can be used in alley cropping to increase the soil's nitrogen content. The species of rhizobia responsible for nitrogen fixation in Sesbania rostrata is Azorhizobium caulinodans.

Some 60 species are currently accepted, with about 39 still unresolved. The genus is native to tropical and subtropical regions around the world, in the Americas from the southern United States to northern Argentina, in sub-Saharan Africa, in southern Asia, and in New Guinea, Australia, and the Pacific. The largest number of species are found in Africa, and the remainder in Australia, Hawaii, and Asia.

Fossil record
Fossil seed pods from the upper Oligocene resembling Sesbania have been found in the Hungarian locality of Eger Wind-brickyard. The fossil species grew in a swampy and riparian environment.

List of species
60 species are accepted, organized into three sections:

Section Glottidium (Desvaux) Lavin

 * Sesbania vesicaria (Jacq.) Elliott

Section Daubentonia (DC.) Bentham

 * Sesbania drummondii (Rydb.) Cory
 * Sesbania cavanillesii S.Watson
 * Sesbania macroptera Micheli
 * Sesbania punicea (Cav.) Benth. – rattlebox
 * Sesbania virgata (Cav.) Poir. – wand riverhemp

Section Sesbania Adans.

 * Sesbania benthamiana Domin
 * Sesbania bispinosa (Jacq.) W.Wight
 * Sesbania brachycarpa F.Muell.
 * Sesbania brevipeduncula J.B.Gillett
 * Sesbania campylocarpa (Domin) N.T.Burb.
 * Sesbania cannabina (Retz.) Poir.
 * Sesbania chippendalei N.T.Burb.
 * Sesbania cinerascens Welw. ex Baker
 * Sesbania coccinea (L.f.) Poir.
 * Sesbania coerulescens Harms
 * Sesbania concolor J.B.Gillett
 * Sesbania dalzielii E.Phillips & Hutch.
 * Sesbania dummeri E.Phillips & Hutch.
 * Sesbania erubescens (Benth.) N.T.Burb.
 * Sesbania exasperata Kunth
 * Sesbania formosa (F.Muell.) N.T.Burb.
 * Sesbania goetzei Harms
 * Sesbania grandiflora (L.) Poir.
 * Sesbania greenwayi J.B.Gillett
 * Sesbania hepperi J.B.Gillett
 * Sesbania herbacea (Mill.) McVaugh – bigpod sesbania
 * Sesbania hirtistyla J.B.Gillett
 * Sesbania hobdyi O.Deg. & I.Deg.
 * Sesbania javanica Miq.
 * Sesbania keniensis J.B.Gillett
 * Sesbania leptocarpa DC.
 * Sesbania macowaniana Schinz
 * Sesbania macrantha Welw. ex E.Phillips & Hutch.
 * Sesbania madagascariensis Du Puy & Labat
 * Sesbania mannii Sachet
 * Sesbania melanocaulis Bidgood & Friis
 * Sesbania microphylla Harm.
 * Sesbania mossambicensis Klotzsch
 * Sesbania notialis J.B.Gillett
 * Sesbania oligosperma Taub.
 * Sesbania pachycarpa DC.


 * Sesbania paucisemina J.B.Gillett
 * Sesbania procumbens Wright & Arn.


 * Sesbania quadrata J.B.Gillett
 * Sesbania rostrata Bremek. & Oberm.


 * Sesbania sericea (Willd.) Link – papagayo
 * Sesbania sesban (L.) Merr. – Egyptian riverhemp
 * Sesbania simpliciuscula F.Muell. ex Benth.
 * Sesbania somaliensis J.B.Gillett
 * Sesbania speciosa Taub. ex Engl.
 * Sesbania sphaerosperma Welw.
 * Sesbania subalata J.B.Gillett
 * Sesbania sudanica J.B.Gillett
 * Sesbania tetraptera Hochst. ex Baker
 * Sesbania tomentosa Hook. & Arn. – Ōhai (Hawaii)
 * Sesbania transvaalensis J.B.Gillett

Incertae Sedis

 * Sesbania burbidgeae C.L.Gross
 * Sesbania emerus (Aubl.) Urban – coffeebean
 * Sesbania longifolia DC.
 * Sesbania marchionica F.Br.
 * Sesbania muelleri C.L.Gross
 * Sesbania uliginosa (Roxb.) G.Don
 * Sesbania wildemannii E.Phillips

Phylogeny
Modern molecular phylogenetics suggest the following relationships between the species of Sesbania: