Notable examples include water hyacinth, salt cedar, and purple loosestrife. It is also found in a variety of essential oils including jasmine, hyacinth and ylang-ylang. They eat reeds, the giant reed, bulrush, sedges, the common water hyacinth, and rushes. Macadamia seeds are often fed to hyacinth macaws in captivity. The hyacinth and the tulip are popular and conspicuous. In Millfield, the streets are all associated with plants, e.g. Chester, Fern, Rose, Hyacinth etc. Hyacinth bulbs are poisonous; they contain oxalic acid. Bioherbicidal activity of "L. leucocephala" on terrestrial plants and aquatic weed water hyacinth were reported. "R. swinhoei" eats fish, crabs, snails, water hyacinth, frogs, and leaves. They were described as having hair that resembled hyacinth flowers. It was called so because its color resembled that of the hyacinth flowers. Common names include camas, quamash, Indian hyacinth, camash, and wild hyacinth. The stem is used in curry made with "vaal" hyacinth bean. This tuft gives rise to the name "tassel hyacinth". The mounted horsemen wore breastplates with the color of fire, hyacinth, and brimstone.