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RE: Old Man's Beard

in #tillandsia6 years ago

Spanish moss is neither from Spain nor a moss; it is an epiphytic member of the pineapple family from the Americas. Epiphytes are plants growing on other plants from which they derive no nutrients.

Across its native range, from southeastern North America through Central and South America as far south as Argentina and Chile, it is a common sight draped over trees in high humidity areas.

There is even evidence that the distribution of Tillandsia usneoides is correlated with the damage created by major storms. Carolus Linnaeus' use of the specific name, usneoides (Usnea-like), refers to the plant's superficial morphological and ecological similarity to the lichen genus Usnea, which is a symbiotic relationship between a blue-green alga and a fungus.

Tillandsia usneoides is rootless, consisting of narrow, alternate leaves arranged along a slender, wiry, silvery blue-green stem. Tillandsia usneoides lacks an extensive vascular system but is covered in tiny, water-absorbing scales; all the plant's water and nutrient needs are derived from rain, dust and detritus.

Since Tillandsia usneoides gets all of its nutrients from the atmosphere it has been extensively investigated as a monitor for heavy metal pollution in urban areas.

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