Indigofera decora

{{Short description|Species of legume}}

{{Redirect|Summer wisteria||Wisteria}}

{{Speciesbox

| image = Indigofera decora - 'Summer wisteria' (4169168188).jpg

| image_caption = Summer wisteria

| status =

| status_system =

| taxon = Indigofera decora

| authority = Lindl.

| synonyms =

• Indigofera incarnata (Willd.) Nakai

| synonyms_ref =

|range_map = Indigofera decoraDistMap19.png

|range_map_caption = Distribution in Australia

}}

Indigofera decora, commonly known as summer wisteria, is a species of shrub native to China and Japan that has since been introduced to Australia and Sri Lanka.{{Cite web|title=Indigofera incarnata (Willd.) Nakai {{!}} Plants of the World Online {{!}} Kew Science|url=http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:499488-1|access-date=2021-03-08|website=Plants of the World Online|language=en}} A member of the genus Indigofera, its family is Fabaceae{{cite web|url=http://www.catalogueoflife.org/col/details/species/id/e90a49b7f674b059ca98533a9872fb3d|title=Species Details : Indigofera decora Lindl.|access-date=26 January 2019|website=Catalogue of Life}} and is used primarily for decorative purposes,{{cite web|url=http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=e382|title=Indigofera decora|work=Missouri Botanical Garden|access-date=26 January 2019}} though it has also been used to make indigo-colored dye.

I. decora is a deciduous, spreading shrub. It often grows 1–2.5 feet tall and 3-4 feet wide. It features compound, pinnate leaves up to 8 inches long with 7-13 elliptic, dark green leaflets. In the summer, it produces axillary racemes of light pink or purple pea-like flowers. Each raceme may boast twenty to forty flowers, and the calyxes have broadly triangular lobes.{{Cite web|title=Indigofera decora - Trees and Shrubs Online|url=https://treesandshrubsonline.org/articles/indigofera/indigofera-decora/|access-date=2021-03-08|website=treesandshrubsonline.org}}

I. decora is best suited to well-drained, neutral to slightly alkaline soils. It is somewhat heat and drought tolerant, but benefits from afternoon shade in hot, humid environments. It is cold hardy in the US in zones 7–11.{{Cite web|title=Indigofera incarnata (Chinese Indigo) {{!}} North Carolina Extension Gardener Plant Toolbox|url=https://plants.ces.ncsu.edu/plants/indigofera-incarnata/|access-date=2021-03-08|website=plants.ces.ncsu.edu}}