Lupine
To me one of the most beautiful and most unusual flowers that I have seen are Lupins. It is a beautiful thing to drive by a field that has nothing but purple colors from these flowers. They are unusual and I have only seen them up north.
Lupin, often spelled lupine in, is the common name for members of the genus Lupinus in the family Fabaceae. The genus comprises between 150-200 species, and has a wide distribution in the Mediterranean region and the Americas. The species are mostly herbaceous perennial plants 0.3-1.5 meters tall, but some are annual plants and a few are shrubs up to 3 m tall.
They have a characteristic and easily recognised leaf shape, with soft green to grey-green or silvery leaves divided into 5–17 finger-like leaflets that diverge from a central point; in many species, the leaves are hairy with silvery hairs, often densely so. The flowers are produced in dense or open whorls on an erect spike, each flower 1-2 cm. long, with a typical peaflower shape with an upper ’standard’, two lateral ‘wings’ and two lower petals fused as a ‘keel’. The fruit is a pod containing several seeds.
Like most members of this family, lupins can fix nitrogen from the atmosphere into ammonia, fertilizing the soil for other plants. The genus Lupinus is nodulated by the soil microorganism Bradyrhizobium. Some species have a long central tap root. Lupins are popular ornamental plants in gardens. There are numerous hybrids and cultivars. Some species, such as Lupinus polyphyllus and hybrids like the Rainbow Lupin (Lupinus × regalis) are common garden flowers. Others, such as the Yellow Bush Lupin L. arboreus are considered invasive weeds when they appear outside their native range.
Lupins are also cultivated as forage and grain legumes. Three Mediterranean region species of lupin, Lupinus angustifolius (Blue Lupin), Lupinus albus (White Lupin) and Lupinus luteus (Yellow Lupin) are cultivated for livestock and poultry feed and for human consumption. The Andean Lupin Lupinus mutabilis and the Mediterranean L. albus, L. angustifolius and L. hirsutus (these varieties are known locally as altramuz in Spain and Argentina are also edible after soaking the seeds for some days in salted water.
These lupins are referred to as sweet lupins because they contain smaller amounts of toxic alkaloids than the bitter varieties. Both sweet and bitter lupins in feed can cause livestock poisoning. Lupin poisoning is a nervous syndrome caused by alkaloids in bitter lupins, similar to Neurolathyrism. Mycotoxic lupinosis is a disease caused by lupin material that is infected with the fungus Diaporthe toxica; the fungus produces mycotoxins called phomopsins, which cause liver damage. The worst damage to lupin is caused by anthracnose, fusarium wilt, fusarium and other root rot, bacteria and viruses.