It is an evergreenperennial growing to with a noticeable expanded caudex, for storing water. The single palm-like stem produces terminal tufts of strap-shaped, recurved leathery leaves, sometimes hair lock-shaped in the ends, and with occasional panicles of small white flowers once the plant reaches over 10 yearsof age. The only moderately swollen trunk at the base is slender over it and only slightly branched. The almost spherical caudex in the youth stage later becomes 4 to 6 meters long and reaches a diameter of up to 50 centimeters and more at the base. The bark is smooth. The green lineal, slightly rejuvenated and bent leaves are thin, flat or slightly ridged. They are 90 to 180 inches long and 15 to 20 millimeters wide.
Habitat
Its habitat is low deciduous forest, whose average temperatures of 20 °C and an annual rainfall of 800 mm, and a well-marked dry season of between 7 and 8 month. This type of forests are in an altitudinal range of 0 to 1700 meters above sea level. They grow on rocky soils deficient in nutrients, cliffs and steep mountains. The plant is resistant up to 10 °C, and grows in full sun or partial shade. The plants are very slow growing and very tolerant to drought, in a pot or planted as an ornamental garden tree.
Cultivation
Having gained the Royal Horticultural Society's Award of Garden Merit. B. recurvata is often grown as a houseplant or an outdoor plant in temperate climate gardens. Slow-growing and drought-tolerant, Beaucarnea recurvata is hardy to, grows in full sun to light shade, and requires proper soil mix to drain when watered. However, be cautious not to over-water, as this will foster pests like the mealybug and cochineal insect. If going to be kept in places with strong winters, it must be an indoor plant as it cannot resist cold temperatures. To maintain its original shape, the ends of its leaves should not be snipped, and when repotted it must keep all of its roots. There are 10 different species of this plant, according to the Institute of Ecology in Xalapa, state of Veracruz, which runs the Jardín BotánicoFrancisco Javier Clavijerobotanical garden, where over 400 Beaucarneas are exhibited and more are grown in greenhouses for conservation purposes, in the "Colección Nacional de Beaucarneas".
State of conservation
The species of the genus Beaucarnea are mostly in critical condition due to various anthropogenic activities, which has led to severe fragmentation and destruction of their habitat. On the other hand, the extraction of seeds, seedlings, juveniles and adults have affected the size of the population and the proportion of sexes, reducing with this the possibilities of fertilization and, consequently, the production of seeds. This exploitation process exposes this species, in a state of threat or extinction, by reducing the minimum viable size of the populations, as well as the deterioration of their genetic diversity. B. recurvata, is considered to be threatened according to Official Mexican Standard 059-ECOL-2010 of SEMARNAT in Mexico.
