''Colutea'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of about 25

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

deciduous In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, a ...

flowering shrubs in the legume family Fabaceae, growing from 2–5 m tall, native to southern

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, north

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

and southwest

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an ...

. The leaves are

pinnate Pinnation (also called pennation) is the arrangement of feather-like or multi-divided features arising from both sides of a common axis. Pinnation occurs in biological morphology, in crystals, such as some forms of ice or metal crystals, an ...

and light green to glaucous grey-green. The

flower A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechanism ...

s are yellow to orange, pea-shaped and produced in racemes throughout the summer. These are followed by the attractive inflated seed pods which change from pale green to red or copper in colour. '' Colutea arborescens'', known as Bladder Senna— John Gerard cautioned, however, that they are not true senna, "though we have followed others in giving it to name Bastard Sena, which name is very unproper to it"— is indigenous to the

Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on th ...

; it has yellow flowers. It has a height and spread of up to 5 m. Other species include '' Colutea orientalis'', with grey leaves and coppery flowers.

Cultivation and uses

''Colutea arborescens'', is in general cultivation in the UK. It was imported early, before 1568, probably for medicinal purposes, but now is grown mostly for its attractive

seed A seed is an embryonic plant enclosed in a protective outer covering, along with a food reserve. The formation of the seed is a part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiosper ...

pods., used in dried arrangements. Though in Virginia

Thomas Jefferson Thomas Jefferson (April 13, 1743 – July 4, 1826) was an American statesman, diplomat, lawyer, architect, philosopher, and Founding Father who served as the third president of the United States from 1801 to 1809. He was previously the nati ...

had it and it appears in Lady Jean Skipwith's lists of plants, in US gardens, it is little more than a marginal curiosity. ''Colutea arborescens'' will grow in poor sandy soils in preference to heavy or

loam Loam (in geology and soil science) is soil composed mostly of sand ( particle size > ), silt (particle size > ), and a smaller amount of clay (particle size < ). By weight, its mineral composition is about 40–40–20% concentration of sand–si ...

y soils. It has become naturalised in the UK, where it established itself in the sharp drainage of railway embankments. It is easy to propagate from seed. It is generally pest resistant, though garden snails will climb up the plant in wet weather to eat the leaves. The hybrid ''Colutea × media'' (''C. arborescens'' × '' C. orientalis'') is also cultivated for its coppery flowers. ''Colutea'' species are used as food plants by the

larva A larva (; plural larvae ) is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle. Th ...

e of some Lepidoptera species including '' Coleophora colutella''. The Bedouins of the Sinai and

Negev The Negev or Negeb (; he, הַנֶּגֶב, hanNegév; ar, ٱلنَّقَب, an-Naqab) is a desert and semidesert region of southern Israel. The region's largest city and administrative capital is Beersheba (pop. ), in the north. At its southe ...

would, in times of scarcity, eat the seeds of ''Colutea istria''.

References

*''The New RHS Dictionary of Gardening'' ed. A. Huxley, 1992. Galegeae Fabaceae genera {{Faboideae-stub