Smilax - Radix Fire Protection

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Smilax is a genus of about 300-350 species, found in the tropics and subtropics worldwide. In China for example about 80 are found (39 of which are endemic), while there are 20 in North America north of Mexico. They are climbing flowering plants, many of which are woody and/or thorny, in the monocotyledon family Smilacaceae, native throughout the tropical and subtropical regions of the world. Common names include catbriers, greenbriers, prickly-ivys and smilaxes. "Sarsaparilla" (also zarzaparrilla, sarsparilla) is a name used specifically for the Jamaican S. regelii as well as a catch-all term in particular for American species. Occasionally, the non-woody species such as the smooth herbaceous greenbrier (S. herbacea) are separated as genus Nemexia; they are commonly known by the rather ambiguous name "carrion flowers".

Greenbriers get their scientific name from the Greek myth of Crocus and the nymph Smilax. Though this myth has numerous forms, it always centers around the unfulfilled and tragic love of a mortal man who is turned into a flower, and a woodland nymph who is transformed into a brambly vine.


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Description and ecology

On their own, Smilax plants will grow as shrubs, forming dense impenetrable thickets. They will also grow over trees and other plants up to 10 m high, their hooked thorns allowing them to hang onto and scramble over branches. The genus includes both deciduous and evergreen species. The leaves are heart shaped and vary from 4-30 cm long in different species.

Greenbrier is dioecious. However, only about one in three colonies have plants of both sexes. Plants flower in May and June with white/green clustered flowers. If pollination occurs, the plant will produce a bright red to blue-black spherical berry fruit about 5-10 mm in diameter that matures in the fall.

The berry is rubbery in texture and has a large, spherical seed in the center. The fruit stays intact through winter, when birds and other animals eat them to survive. The seeds are passed unharmed in the animal's droppings. Since many Smilax colonies are single clones that have spread by rhizomes, both sexes may not be present at a site, in which case no fruit is formed.

Smilax is a very damage-tolerant plant capable of growing back from its rhizomes after being cut down or burned down by fire. This, coupled with the fact that birds and other small animals spread the seeds over large areas, makes the plants very hard to get rid of. It grows best in moist woodlands with a soil pH between 5 and 6. The seeds have the greatest chance of germinating after being exposed to a freeze.

Besides their berries providing an important food for birds and other animals during the winter, greenbrier plants also provide shelter for many other animals. The thorny thickets can effectively protect small animals from larger predators who cannot enter the prickly tangle. Deer and other herbivorous mammals will eat the foliage, as will some invertebrates such as Lepidoptera (butterflies and moths), which also often drink nectar from the flowers.

Among the Lepidoptera utilizing Smilax are Hesperiidae like the water snow flat (Tagiades litigiosa), Pieridae like the small grass yellow (Eurema smilax), or moths like the peculiar and sometimes flightless genus Thyrocopa. But particularly fond of greenbriers are certain Nymphalidae caterpillars, for example those of:

  • Faunis - faun butterflies
  • Kaniska canace - blue admiral (on China smilax, S. china)
  • Phalanta phalantha - common leopard (on S. tetragona)

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Uses

An extract from the roots of some species - most significantly Jamaican sarsaparilla (S. ornata) - is used to make the sarsaparilla drink and other root beers, as well as herbal drinks like the popular Baba Roots from Jamaica. Two species, S. domingensis and S. havanensis, are used in a traditional soda-like Cuban beverage called pru. The roots may also be used in soups or stews. The young shoots can be eaten raw or cooked and are said to taste like asparagus, and the berries can be eaten both raw and cooked. Stuffed smilax pancake, or fúlíng ji?b?ng (simplified Chinese: ????; traditional Chinese: ????), is a traditional snack from the Beijing region. S. glabra is used in Chinese herbology. It is also a key ingredient in the Chinese medical dessert gu?língg?o, which makes use of its property to set certain kinds of jelly.

The powdered roots of Jamaican sarsaparilla are known as Rad. Sarzae. Jam. in pharmacy and are used as a traditional medicine for gout in Latin American countries. Köhler's Medicinal Plants of 1887 discusses the American sarsaparilla (S. aristolochiifolia), but as early as about 1569, in his treatise devoted to syphilis, the Persian scholar Imad al-Din Mahmud ibn Mas'ud Shirazi gave a detailed evaluation of the medical properties of chinaroot.

Diosgenin, a steroidal sapogenin, is reported from S. menispermoidea. Other active compounds reported from various greenbrier species are parillin (also sarsaparillin or smilacin), sarsapic acid, sarsapogenin and sarsaponin.

Due to the nectar-rich flowers, species like S. medica and S. officinalis are also useful honey plants.

The common floral decoration smilax is Asparagus asparagoides. For example, in the stage version of Harvey, the opening scene describes the home as being "festooned with smilax".


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Species

The genus is divided into a number of sections. Section Smilax includes "woody", prickly vines of temperate North America, for example cat greenbrier (S. glauca) and common greenbrier (S. rotundifolia). Section Nemexia includes unarmed herbaceous plants of temperate North America, for example "carrion flowers" like the smooth herbaceous greenbrier (S. herbacea).

Here is a list of species:


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Footnotes

Source of the article : Wikipedia



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