Acer tegmentosum

{{Short description|Species of maple}}

{{Speciesbox

| image = Acer_tegmentosum1.jpg

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Chen, Y. |author2=Gibbs, D. |author3=Oldfield, S. |date=2018 |title=Acer tegmentosum |volume=2018 |page=e.T193883A2288647 |doi=10.2305/IUCN.UK.2018-1.RLTS.T193883A2288647.en |access-date=20 November 2021}}

| genus = Acer

| parent = Acer sect. Macrantha

| species = tegmentosum

| authority = Maxim 1856

| synonyms_ref = [http://www.theplantlist.org/tpl1.1/record/kew-2616545 The Plant List, Acer tegmentosum Maxim. ]

| synonyms = *Acer pensylvanicum var. tegmentosum (Maxim.) Wesm.

• Acer hersii Rehder
• Acer pavolinii Pamp.

}}

Acer tegmentosum, the Manchurian striped maple,{{cite web | url= https://www.rhs.org.uk/Plants/289/i-Acer-tegmentosum-i/Details

| title = Acer tegmentosum

| publisher = Royal Horticultural Society

| accessdate=29 December 2017}} is a species of deciduous tree in the maple genus, which is native to the southern part of the Russian Far East (along the Amur and Ussuri rivers in Primorsky Krai), northeastern China (Heilongjiang, Jilin, Liaoning), and Korea.[http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200013120 Flora of China, Acer tegmentosum Maximowicz, 1856. 青楷枫 qing kai feng ]

Acer tegmentosum is cold-hardy down to USDA hardiness zone 5a (-29 °C). At maturity (20-plus years) it can reach a height of {{convert|10-15|m|ft}} and a spread of {{convert|8|m|ft}}, with greenish-grey bark with bright white stripes. Leaves are simple, each up to 12 cm across, round in general outline but with 3 shallow lobes (sometimes with two small additional lobes near the base), and doubly toothed edges.{{Cite web |url=http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/acer_tegmentosum.html |title=North Carolina State University Cooperative Extension, Trees: Acer tegmentosum |access-date=2011-04-27 |archive-url=https://web.archive.org/web/20120925190849/http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/acer_tegmentosum.html |archive-date=2012-09-25 |url-status=dead }}[http://www.treetopics.com/acer_tegmentosum/index.htm Acer tegmentosum - Tree Topics, Karren Wcisel, Manchurian Striped Maple Tree Fact Sheet][https://www.biodiversitylibrary.org/page/8368165#page/221/mode/1up Rehder, Alfred 1922. Journal of the Arnold Arboretum 3(4): 217–219] description in Latin, commentary in English, as Acer hersii The green leaves turn bright yellow before falling in autumn. Pendulous racemes of yellow-green flowers 7–10 cm long give way to samaras that are 1.1-1.3 cm long.{{Cite web|title=Acer tegmentosum - Trees and Shrubs Online|url=https://treesandshrubsonline.org/articles/acer/acer-tegmentosum/|access-date=2021-03-23|website=treesandshrubsonline.org}}

In cultivation in the UK it has gained the Royal Horticultural Society's Award of Garden Merit. Cultivars include 'Joe Witt', 'Valley Phantom', and 'White Tigress'.{{Cite web|title=PlantSearch|url=https://tools.bgci.org/plant_search.php?action=Find&lang=eng&ftrGenus=Acer&ftrSpecies=tegmentosum|access-date=23 March 2021|website=Botanic Gardens Conservation International}}

Though generally not considered a concern for conservationists, it was listed as "vulnerable" in the 2004 Chinese Species Red List.{{Cite book|last1=Gibbs|first1=Douglass|title=The Red List of Maples|last2=Chen|first2=Yousheng|publisher=Botanic Gardens Conservation International|year=2009|isbn=978-1-905164-31-8|location=Richmond, UK|pages=33}}