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Desert Indigo is great for a butterfly garden.
Indigofera gerardiana has panicles of purple-pink flowers and delicate grayish-green foliage. Good for summer flowering as it blooms for several weeks in summer and continues into the fall.
A short-lived herbaceous plant with creeping or scrambling stems. Its alternately arranged leaves are once-compound with 5-11 leaflets these oblong leaflets have hairless or sparsely hairy upper surfaces and densely hairy undersides. Its small pink or pinkish-orange pea-shaped flowers are arranged in elongated clusters.
I. spicata is native to Africa, Madagascar and throughout South and Southeast Asia, and was introduced to the Americas in tropical areas. It effectively controls soil erosion, even under heavy rainfall on slopes, hills and undulating land.
This plant contains indospicine and is notably toxic to many grazing animals.
Dense, suckering shrub, pea-like flowers which bloom heavily in June and July and sometimes continue intermittently to September. Needs long growing season. Blooms on new growth. Used for many years to produce indigo dyes. Ancient dyeplant known for the clarity and fastness of the blue produced. Leaves contain indican which must be oxidized by fermentation to produce the dye. Fresh herbage (strongest when in flower) is steeped in water for 12-48 hours with frequent stirring. A blue sediment will form which is the dye.
Long spikes of deep indigo blue, tubular flowers are borne continuously from spring to frost on this vigorous perennial Salvia.
Impressively statured herbaceous shrub with thickened veins and bright pink flowers. Very showy and useful plant. The leaves contain 0.4 - 1.3% indican, which can be hydrolyzed and oxidized to produce the classic Blue Indigo Dye. A dark Blue dye is obtained from the twigs. It is combined with Turmeric (Curcuma longa) to make Green, and with Safflower (Carthamus tinctorius) to make Purple. The source of famous dye Assam Indigo, it was formerly cultivated on quite a large scale as a dye plant in China and India. Fresh juice from the leaves is used on Okinawa Island, Japan as a popular remedy for athlete's foot.
See Article about this plant: Strobilanthes, Chinese Rain Bell - a source of Blue, Green, and Purple.
Randia aculeata is six to 10 feet tall, evergreen, with spiny, leathery leaves that cluster near the tips of the branches. They are simple, two-inch leaves, no teeth, circular, veins are pinnate, read spreading out from a central vein. The leaves and stiff horizontal branching habit give the shrub a kind of geometric look. Small white tubular flowers are produced axillarily, that is where the leaf or branch stems meet the main stem. They are fragrant and occur all year. Spread by birds, the seeds of Randia aculeata sprout throughout its range of South Florida, and much of Tropical America. They ripen from green to white and are filled with a blue pulp.
Pleasantly fragrant, six inch white flowers flushed purple or indigo in the throat.