Yucca

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Clistoyucca (Engelm.) Trel.
Samuela Trel.
Sarcoyucca (Engelm.) Linding.[1]

Yucca is a genus of perennial shrubs and trees in the agave family, Agavaceae. Its 40-50 species are notable for their rosettes of evergreen, tough, sword-shaped leaves and large terminal panicles of white or whitish flowers. They are native to the hot and dry (arid) parts of North America, Central America, South America, and the Caribbean. Early reports of the species were confused with the cassava (Manihot esculenta).[2] Consequently, Linnaeus mistakenly derived the generic name from the Carib word for the latter, yuca.[3]

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Distribution

The natural distribution range of the genus Yucca (49 species and 24 subspecies) covers a vast area of North and Central America. From Baja California in the west, northwards into the southwestern United States, through the drier central states as far north as Alberta in Canada (Yucca glauca ssp. albertana), and moving east along the Gulf of Mexico, and then north again, through the Atlantic coastal and inland neighbouring states. To the south, the genus is represented throughout Mexico and extends into Guatemala (Yucca guatemalensis). Yuccas have adapted to an equally vast range of climatic and ecological conditions. They are to be found in rocky deserts and badlands, in prairies and grassland, in mountainous regions, in light woodland, in coastal sands (Yucca filamentosa), and even in subtropical and semi-temperate zones, although these are nearly always arid to semi-arid.

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