English: Classification of legume root nodules based on morphology (names of legume genera exhibiting this morphology are provided in parentheses):
Determinate:
A. globose (Glycine, Vigna, Erythrina, Sesbania)
B. aeschynomenoid/dalbergioid (Aeschynemone, Arachis, Dalbergia)
Indeterminate:
C. elongate (Albizia, Tephrosia, Vicia)
D. bifurcate (Leucaena, Medicago)
E. palmate (Acacia, Crotalaria)
F. coralloid (Albizia moluccana)
G. perennial branched clusters (Swartzia trinitensis)
H. perennial globose—apical (Wisteria sinensis), shown here at 1, 2, and 4 years
I. lupinoid (Lupinus, Listia)
Based on:
Allen ON, Allen EK. (1981) The Leguminosae: A Source Book of Characteristics, Uses, and Nodulation. Madison, WI: The University of Wisconsin Press, pp. lii–liii. ISBN0-299-08400-0
Sprent JI. (2007) "Tansley Review: Evolving ideas of legume evolution and diversity: a taxonomic perspective on the occurrence of nodulation." New Phytol174 (1): 11–25 doi:10.1111/j.1469-8137.2007.02015.x
Sprent JI, James EK. (2007) "Legume Evolution: Where Do Nodules and Mycorrhizas Fit In?" Plant Physiol144 (2): 575–581 doi:10.1104/pp.107.096156
Sprent JI, Ardley JK, James EK. (2013) "From North to South: A latitudinal look at legume nodulation processes." S Afr J Bot89: 31–41 doi:10.1016/j.sajb.2013.06.011
{{Information |Description ={{en|1=Classification of legume root nodules based on morphology (names of legume genera exhibiting this morphology are provided in parentheses): *'''A.''' globose (''Glycine'', ''Vigna'', ''Erythrina'', ''Sesbania'') *''...