Latin name: Sequoioideae
Number of species: 3
circulation area: USA, China
fruit: about 8cm long cones
heyday: March May
height: 50 - 120m
Older: up to 1500 years; Single copies also significantly older
Properties of the bark: fireproof
Properties of the wood: reddish-brownish wood
Locations of the tree: nutrient-poor and loose soil, sunny and at the same time high rainfall
leaf: about 0.5 - 1cm long needles
Interesting about the sequoia
redwoods belong to the cypress family or taxodiaceae family and comprise three independent single genera within the conifers, namely the Sequoia gigantea or Redwoodtree, the Sequoia sempervirens or Red Wood as well as the Chinese Dawn redwood tree, The Sequoia and the Red Wood are native to the northwestern United States and differ mainly with each other in their living habits and only slightly in the appearance of their leaves. The Sequoia thrives in the western part of the Sierra Nevada, the Red Wood in the misty coastal areas of Northern California, especially on the sections between Seattle and Los Angeles.
Sequoias are considered living fossils, covering 110 million years ago in vast forests covering much of the earth's surface. The sequoia is considered to be the most powerful tree in the world's flora and reaches stature heights of over one hundred meters and a life of over 1500 years. Previously, the existence of these trees was significantly higher, but thousands of copies fell victim to the gold rush and were ruthlessly felled in the 19th century. The remainders are now in national parks under the strictest nature conservation.
The leaves of the sequoia are gray-blue in color and have pointed, spirally arranged scales. From the inconspicuous flowers develop as fruits of the red-brown elliptical, initially upright cones, which are about eight inches long and begin to hang only in the second year. The propagation of the Sequoias is extremely time-consuming, because the seeds can be released only by strong storms or forest fires to the environment. Apart from that, only the Douglas squirrel contributes to the spread of the seeds, as it feeds on the cones and sometimes some seeds fall to the ground during food intake.
The sequoia native to the Sierra Nevada is protected from the devastating forest fires by an unusually soft and fireproof bark. She is over seventy inches thick and secretes under strong heat from a liquid. A high content of tannic acid also prevents parasites such as insects or fungi from penetrating the interior of the tree and destroying the tissue.
Since their discovery in the United States, there have been repeated attempts over the centuries to cultivate redwoods in Europe as well. The oldest specimen living in Germany is about 140 years old. Since the rhizome of the sequoia tree takes up a lot of space, planting in public parks is hardly possible in many places.