Glyptostrobus is a small genus of conifers in the family Cupressaceae (formerly in the family Taxodiaceae). The sole living species, Glyptostrobus pensilis, is native to subtropical southeastern China, from Fujian west to southeast Yunnan, and also very locally in northern Vietnam and Borikhamxai Province of eastern Laos near the Vietnam border.[2][3]
G. pensilis is a medium-sized to large tree, reaching 30 m (98 ft) tall and with a trunk diameter of up to 1 m (3.3 ft), possibly more. The leaves are deciduous, spirally arranged but twisted at the base to lie in two horizontal ranks, 5–20 mm (0.20–0.79 in) long and 1–2 mm (0.039–0.079 in) broad, but 2–3 mm (0.079–0.118 in) long and scale-like on shoots in the upper crown. The cones are green maturing yellow-brown, pear-shaped, 2–3 cm (0.79–1.18 in) long and 1–1.5 cm (0.39–0.59 in) diameter, broadest near the apex. They open when mature to release the small, 5–20 mm (0.20–0.79 in) long, winged seeds.
It typically grows in river banks, ponds and swamps, growing in water up to 60 cm (24 in) deep. Like the related genus Taxodium, it produces 'cypress knees' when growing in water, thought to help transport oxygen to the roots.
The species is nearly extinct in the wild due to overcutting for its valuable decay-resistant, scented wood, but it is also fairly widely planted along the banks of ricepaddies where its roots help to stabilise the banks by reducing soil erosion.
References
^. Germplasm Resources Information Network. United States Department of Agriculture. 2007-07-17. Archived from the original on 2011-06-06. Retrieved 2009-10-14.
^Nguyễn Đúc Tố Luu, Philip Ian Thomas, 2004. Conifers of Vietnam[permanent dead link]. 94 pp. Centre for Ecology & Hydrology, NERC, UK.
^Leonid V. Averyanov, Ke Loc Phan, Tien Hiep Nguyen, Sinh Khang Nguyen, Tien Vinh Nguyen and Thuy Duyen Pham, 2009. Preliminary Observation of Native Glyptostrobus pensilis (Taxodiaceae) Stands in Vietnam. Taiwania, 54(3): 191-212 2012-03-20 at the Wayback Machine.
^LePage, B.A. 2007. The Taxonomy and Biogeographic History of Glyptostrobus. Bulletin of the Peabody Museum of Natural History, 48(2): 359-426. doi:10.3374/0079-032X(2007)48[359:TTABHO2.0.CO;2]
External links
Gymnosperm Database: Glyptostrobus
Arboretum de Villardebelle: photo of cone
Wikimedia Commons has media related to Glyptostrobus.
August 21, 2023
glyptostrobus, small, genus, conifers, family, cupressaceae, formerly, family, taxodiaceae, sole, living, species, pensilis, native, subtropical, southeastern, china, from, fujian, west, southeast, yunnan, also, very, locally, northern, vietnam, borikhamxai, p. Glyptostrobus is a small genus of conifers in the family Cupressaceae formerly in the family Taxodiaceae The sole living species Glyptostrobus pensilis is native to subtropical southeastern China from Fujian west to southeast Yunnan and also very locally in northern Vietnam and Borikhamxai Province of eastern Laos near the Vietnam border 2 3 GlyptostrobusTemporal range Late Cretaceous Recent PreꞒ Ꞓ O S D C P T J K Pg NGlyptostrobus pensilisScientific classificationKingdom PlantaeClade TracheophytesClade GymnospermsDivision PinophytaClass PinopsidaOrder CupressalesFamily CupressaceaeSubfamily TaxodioideaeGenus GlyptostrobusEndl 1 Type speciesGlyptostrobus heterophyllus Brongn Endl Species G europaeus G nordenskioldii G pensilisThe genus formerly had a much wider range covering most of the Northern Hemisphere including the high Arctic in the Paleocene and Eocene The oldest known fossils are late Cretaceous in age found in North America It contributed greatly to the coal swamps of the Cenozoic era It was reduced to its current range before and during the Pleistocene ice ages 4 G pensilis is a medium sized to large tree reaching 30 m 98 ft tall and with a trunk diameter of up to 1 m 3 3 ft possibly more The leaves are deciduous spirally arranged but twisted at the base to lie in two horizontal ranks 5 20 mm 0 20 0 79 in long and 1 2 mm 0 039 0 079 in broad but 2 3 mm 0 079 0 118 in long and scale like on shoots in the upper crown The cones are green maturing yellow brown pear shaped 2 3 cm 0 79 1 18 in long and 1 1 5 cm 0 39 0 59 in diameter broadest near the apex They open when mature to release the small 5 20 mm 0 20 0 79 in long winged seeds It typically grows in river banks ponds and swamps growing in water up to 60 cm 24 in deep Like the related genus Taxodium it produces cypress knees when growing in water thought to help transport oxygen to the roots The species is nearly extinct in the wild due to overcutting for its valuable decay resistant scented wood but it is also fairly widely planted along the banks of rice paddies where its roots help to stabilise the banks by reducing soil erosion References Edit Glyptostrobus Endl Germplasm Resources Information Network United States Department of Agriculture 2007 07 17 Archived from the original on 2011 06 06 Retrieved 2009 10 14 Nguyễn Đuc Tố Luu Philip Ian Thomas 2004 Conifers of Vietnam permanent dead link 94 pp Centre for Ecology amp Hydrology NERC UK Leonid V Averyanov Ke Loc Phan Tien Hiep Nguyen Sinh Khang Nguyen Tien Vinh Nguyen and Thuy Duyen Pham 2009 Preliminary Observation of Native Glyptostrobus pensilis Taxodiaceae Stands in Vietnam Taiwania 54 3 191 212 Archived 2012 03 20 at the Wayback Machine LePage B A 2007 The Taxonomy and Biogeographic History of Glyptostrobus Bulletin of the Peabody Museum of Natural History 48 2 359 426 doi 10 3374 0079 032X 2007 48 359 TTABHO2 0 CO 2 External links EditGymnosperm Database Glyptostrobus Arboretum de Villardebelle photo of cone Wikimedia Commons has media related to Glyptostrobus Retrieved from https en wikipedia org w index php title Glyptostrobus amp oldid 1149568556, wikipedia, wiki, book, books, library,
