(L.) L., 1762
Spanish moss (Tillandsia usneoides) is a flowering plant that grows upon larger trees, commonly the Southern Live Oak (Quercus virginiana) or Bald Cypres (Taxodium distichum) in the southeastern United States.
The plant's specific name usneoides means "resembling Usnea", and it indeed closely resembles its namesake Usnea, also known as beard lichen, but in fact Spanish moss is not biologically related to either mosses or lichens. Instead, it is an angiosperm in the family Bromeliaceae (the bromeliads) that grows hanging from tree branches in full sun or partial shade. Formerly this plant has been placed in the genera Anoplophytum, Caraguata, and Renealmia. Its natural range is from Virginia Beach, Virginia in the southeastern United States to Argentina, growing wherever the climate is warm enough and has a relatively high average humidity. It has been introduced to similar locations around the world, including Hawaii and Australia.
The plant consists of a slender stem bearing alternate thin, curved or curly, heavily scaled leaves 2–6 cm (0.79–2.4 in) long and 1 mm (0.039 in) broad, that grow vegetatively in chain-like fashion (pendant) to form hanging structures up to 6 m (240 in) in length. The plant has no aerial roots  and its flowers are tiny and inconspicuous. It propagates both by seed and vegetatively by fragments that blow on the wind and stick to tree limbs, or are carried by birds as nesting material.
While it rarely kills the trees, it lowers their growth rate by reducing the amount of light to a tree's own leaves. It also increases wind resistance, which can prove fatal to the host tree in a hurricane.
In the southern U.S., the plant seems to show a preference of growth on Southern Live Oak (Quercus virginiana) or Bald Cypress (Taxodium distichum) because of these trees' high rates of foliar mineral leaching (calcium, magnesium, potassium, and phosphorus) providing an abundant supply of nutrients to the plant, but it can also colonize other tree species such as Sweetgum (Liquidambar styraciflua), crepe-myrtles (Lagerstroemia spp.), other oaks, and even pines.
Spanish moss in culture and folklore 
Due to its propensity for growing in humid southern locales like Georgia, Louisiana, Mississippi, Florida, Eastern North Carolina, southeastern Virginia, South Carolina, east and south Texas, and Alabama, the plant is often associated with Southern Gothic imagery.
In Hawaii, Spanish moss is typically referred to as ʻUmiʻumi-o-Dole, named for Governor Sanford B. Dole's beard. It was introduced to Hawaii in the 19th century, and became a popular ornamental and lei plant. Recently it is occasionally called "Pele's hair" after Pele the Hawaiian goddess. The term "Pele's hair" usually refers to a type of filamentous volcanic glass.
American Punk Rock band Against Me! has a song titled "Spanish Moss" on their 2010 album White Crosses. "Look into the Spanish moss. Let your mind conjure up old ghosts. Ride your bike through lost Florida streets. Everything we’ve said and done, can be so easily forgotten. You can always change who you are."
American country music singer Brad Paisley uses the phrase 'Spanish Moss' in the chorus of his hit song 'American Saturday Night' (2010), and American country music singer Dierks Bentley refers to it in the first verse of his song 'Every Mile a Memory'.
Human uses 
Spanish moss has been used for various purposes, including building insulation, mulch, packing material, mattress stuffing, and fiber. In the early 1900s it was used commercially in the padding of car seats. In 1939 over 10,000 tons of processed Spanish moss was produced. It is still collected today in smaller quantities for use in arts and crafts, or for beddings for flower gardens, and as an ingredient in the traditional wall covering material bousillage.
Spanish moss is also known to have been worn by the women of the Timucua Indian tribe.
It is also used by some as the filling for traditional voodoo dolls.
Spanish moss in Costa Rica.
Southern Live Oak with Spanish moss hanging from it.
Spanish moss in Louisiana.
ʻUmiʻumi-o-Dole with a taro leaf background.
Spanish moss on a tree in a park in Singapore.
Spanish moss growing on a tree on Hilton Head Island, South Carolina
- "Tillandsia usneoides (L.) L.". Germplasm Resources Information Network. United States Department of Agriculture. 1999-02-26. Retrieved 2009-12-08.
- Genus: Tillandsia L., GRIN Taxonomy for Plants, Agricultural Research Service, United States Department of Agriculture.
- "From Bearded Trees" Popular Mechanics, October 1950, p. 155.
- William H. Schlesinger and P. L. Marks, "Mineral Cycling and the Niche of Spanish Moss, Tillandsia usneoides L.", American Journal of Botany, Vol. 64, No. 10 (Nov.–Dec., 1977), pp. 1254–1262.
- "Nā Lei o Hawai`i - Types of Lei"
- Saturday Night Live transcripts, Season 1: Episode 21 (May 22, 1976), Gordon Lightfoot performs "Spanish Moss".
- "Hair From Trees....Spanish Moss is new upholstering material" Popular Science, June 1937
- Adams, Dennis. Spanish Moss: Its Nature, History and Uses. Beaufort County Library, SC.
- Mabberley, D.J. 1987. The Plant Book. A Portable Dictionary of the Higher Plants. Cambridge University Press, Cambridge. ISBN 0-521-34060-8.
- Tillandsia usneoides (Taxonomic Serial No.: 42371), Integrated Taxonomic Information System
Media related to Tillandsia usneoides at Wikimedia Commons