The name of the multidetachment of the Tregrande (lat. Polystichum tripteron) reflects the appearance of its leaves: the word tripteron is a combination of the Latin word TRI, which meaning three, and pteron, a Greek word meaning a bird wing or a feather. Ancient Greeks used this beautiful term to describe fern. The name that we use today was given in the golden age of fern, in the Viking era, in 1851. The Japanese name “Juumonjishida” comes from the words “Juumonji”, which means “Cross” and “Shida”, which means fern. In a word, a fern with the shape of a cross. Of course, like many fern, described during the time of Pteridomania, or a surge of interest in fern by gardeners and botanists, this fern has many synonyms: Aspidium Tripteron; Dryopteris triptera, Polystichum Tripteron F. Subbipinnatum; Ptilopteris triptera.
Slopped branches Polystichum Triptern grow in the form of a turn, which is an almost perfect circle. The branches are unique in that they have three shields: a basal steam and a much longer apical shield (possibly 4 times longer than a basal pair) form the shape of a cross or trident. This is a bushy fern, often forming processes from the rhizome. In early spring, a multiruler of the Trevodelny grows his new twigs at the same time.
The external characteristic of the multidetachment multidetector:
Where it grows
Distribution: Eastern Siberia, Northeast China, Japan, Korea. Embroidery up to25 ° C. Polystichum Triptern is widespread in all mainland Japanese islands, as well as in Eastern Siberia, North-East China and Korea. This fern is localized in wet valleys, especially near the streams and on subsidence slopes, preferring more cool medium and high heights, 500-1000 meters.
This is a northern fern, more typical for the Manchu forest, which penetrates south until the Kyusu mountains. There it is found at high altitudes, but no further than the south. Most often it can be seen growing very close to streams, sometimes almost in them. Perhaps this is due to evaporative cooling, which is provided by mountain streams. On a hot August day, if you find yourself next to such a stream, you will feel a decrease in temperature by 5 C, and maybe more.
A multiruler of the threedeeds was taken under protection in 14 regions of Eurasia. This rare plant is listed in the Red Book, and its population is taken under observation.