Metasequoia fossils6/20/2023 We will choose an orientation with a very strong sunlight exposition. Where do we place the dawn redwood bonsai? When we water the bonsai, part of the water remains in the saucer generating a humid microenvironment that is good for the tree. We place a saucer under the tree filled with gravel. It will give you a better understanding of the needs of your bonsai.Īlso, we can use a trick that we also use with Shohin or Mame bonsais. If you have doubts, you could consider to use a watering indicator at the beginning. You have to take in consideration the temperature, geographical area and the location. The need of watering is reduced when it loses its leaves in autumn. It should be irrigated approximately 4 or 5 times per week in summer and 2 times per week the rest of the year. The substrate must drain well, but at the same time needs to retain humidity. Excess salts and excessive pH levels have a negative effect on the bonsai. Watering should be moderate and with quality water. The key point in the care of the Metasequoia bonsai. Metasequoia means “near the sequoia trees”. Its name comes from the Greek prefix “meta” meaning “close to”. This tree likes temperate and even a little cool climate. Metasequoias leaves are paripinnate and the bark is brown with red notes. The most fascinating feature is that, even if it is a conifer, it is a deciduous tree, the same that happens with the Marsh Cypress. In their habitat, Metasequoias can grow up to 45 metres tall. It is a rainy area with humidity and constant flooding. The origin of this tree, that belongs to the Taxidiaceae family, comes from the Chinese area of Sichuan Hubei. In 1941 the Japanese botanist Shigeru Miki, after a detailed study, rediscovered and gave it the scientific name Metasequoia. The fossils found proved that it existed 55 million years ago. Known as Dawn redwood, it is a living fossil tree whose structure has not changed at all during its existence. glyptostroboides (4, 9–11).Can you imagine having in your bonsai collection a tree that has been on Earth for thousands of years? Do you want to know more about dawn redwood tree? In this blog we explain the curiosities and the care of the Metasequoia bonsai. glyptostroboides ) (1–3, 5–8) and modern M. Leafy shoots, leaves and seed cones of fossil Metasequoia sp. SU Tao, principal investigator of the study. The intensification of the Asian monsoon in Yunnan during the Neogene most likely prevented necessary adaptations of the plants to increasing winter and spring aridity," said Prof. "We regard that the disappearance of Metasequoia from Southwest China might be related to the evolutionary stasis of Metasequoi. It was present in the Arctic cool temperate zone during the Eocene, in temperate zones, e.g., in Northeast China during the Paleogene as well as in nearly subtropical areas in Southwest China during the Neogene. The researchers also found that the genus has remained morphologically static at least since the early Neogene. glyptostroboides, the researchers identified their fossil materials as Metasequoia sp. Judging by the great morphological similarity between the fossils and extant M. The Sanzhangtian fossils differ from other fossil-species of Metasequoia in seed cone phyllotaxis, which is exclusively decussate in the Sanzhangtian cones but mixed decussate–helical in the others. The fossil record has been published in Review of Palaeobotany and Palynology.Ĭharacters of leafy shoots, including the cuticle micromorphology of the leaves and gross-morphology of seed cones, unambiguously refer the fossils from Sanzhangtian to the genus Metasequoia. It's the first Metasequoia fossil record in Southwest China and the southernmost fossil record of the genus around the world. Researchers from Xishuangbanna Tropical Botanical Garden (XTBG) have recently discovered numerous well-preserved leafy shoots and seed cones of Metasequoia from the middle Miocene deposits in Sanzhangtian, Zhenyuan County, Yunnan. Although native to China, reliable Metasequoia megafossil records from only nine localities ranging from the Late Cretaceous to the middle Miocene have been reported in this country to date, most of them were reported from the northern part of China.
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