The genus name, coined by Pliny already to indicate dates of second quality (such as those theophrastii Phoenix and Chamaerops humilis ) as good as food for pigs, derives from the greek ' syagros 'meaning wild boar, and was taken up by modern taxonomy for this kind of fruit probably due to the similarity with those of the above. The adjective is specifically dedicated to the Russian nobleman Romanzoff Nicola, who lived between 700 and 800, which financed several expeditions of exploration, including the one where the German botanist discovered LK von Chamisso this species. This palm comes from Brazil where he was going to fuck in 1816 and was soon introduced into Europe as an ornamental. He single trunk and straight, slender, with a diameter of 40 cm and a maximum height even more than 15 m. At the top is surrounded by large sheaths of the leaves of grayish brown, with margins with bristles.
The leaves are 3 to 5 m long: the spine, after a stem of 40 cm, also brings numerous lateral segments 70-80 cm long, slender, curved at the apex which is acute and pendants. The inflorescence has one order of branching and bears flowers of both sexes, it is up to 1 m long and is surrounded by a spathe large and well lignified. 
The fruit is ovoid, up to 3 cm long, at first green, then orange at maturity. The seeds have a great variance in shape, size, color and veins but are basically miniature chariots which does not contain an edible endosperm. 
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