Acer distylum

Acer distylum, the lime-leaved maple or linden leaved maple, is a species of flowering plant in the family Sapindaceae, native to north Honshu Island of Japan.[3] Its closest relative is Acer nipponicum, with which it is grouped in the Acer section Parviflora.[4] The species is noted for its 10–15 cm (4–6 in) unlobed leaves, the like of which are not found in any other maple species.[5] The bark is grayish, and has a pink cast in young specimens.[5] Acer distylum was first described by Philipp Franz von Siebold and Joseph Gerhard Zuccarini in 1845, and later brought to Europe by Charles Maries in 1879.[5]

Acer distylum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Sapindaceae
Genus: Acer
Section: Acer sect. Parviflora
Series: Acer ser. Distyla
Species:
A. distylum
Binomial name
Acer distylum

Distribution

Acer distylum is endemic to Japan, growing on fertile soils in the northern part of Honshu, but even there it is rather rare.[6]

Habitat and ecology

Acer distylum can be found mostly in woodland or garden canopy.[7] Acer distylum is a treelike shrub to 10 m tall under favorable conditions, otherwise a much smaller shrub, with yellow-gray branches that are rather densely branched. Charles Maries introduced it in 1879 to Great Britain for Veitch Nursery, although Siebold and Zuccarini made the description in 1845. It is rather rare in Great Britain, but good specimens can be found in several gardens and collections.[6]

Morphology

Deciduous trees or large shrubs, small to medium height (5–10 m tall), yellow-gray branches that are rather densely branched. Leaves are undivided, deeply cordate, margins crenate, ovate, not lobed, 10–15 cm long and 5–8 cm wide, gray-green. Undersides pale green, shining and glabrous, pinkish gray when young. The fall color is yellow. Flowers are sepals hairy; discs lobed; stamens inserted between the lobes.[6]

Flowers and fruit
Acer distylum

Acer distylum has pale green inflorescences that are 7–10 cm long, and flower in May to June, fruits 3–3.5 cm. The flowers are monoecious. The flowers' sepals are hairy, discs lobed, and stamens inserted between the lobes. Yellow on very erect spikes, small, nodding from the erect pedicels. Fruits are born on conspicuous erect racemes; nutlets with rounded wings about 3 cm long.[6]

References
  1. Harvey-Brown, Y. (2020). "Acer distylum". IUCN Red List of Threatened Species. 2020: e.T193542A2243139. doi:10.2305/IUCN.UK.2020-1.RLTS.T193542A2243139.en. Retrieved 2 August 2023.
  2. Abh. Math.-Phys. Cl. Königl. Bayer. Akad. Wiss. 4(2): 154 (1845)
  3. "Acer distylum Siebold & Zucc". Plants of the World Online. Board of Trustees of the Royal Botanic Gardens, Kew. 2017. Retrieved 18 November 2020.
  4. Li, Jianhua; Stukel, Mark; Bussies, Parker; Skinner, Kaleb; Lemmon, Alan R.; Lemmon, Emily Moriarty; Brown, Kenneth; Bekmetjev, Airat; Swenson, Nathan G. (2019). "Maple phylogeny and biogeography inferred from phylogenomic data". Journal of Systematics and Evolution. 57 (6): 594–606. doi:10.1111/jse.12535. S2CID 202016131.
  5. Moore, D.; White, J. (2005) [1st pub. 2002]. "Maples". The Illustrated Encyclopedia of Trees (2nd ed.). Portland, Oregon: Timber press. p. 639. ISBN 0-88192-751-1.
  6. De Jong, P.C. (1994). Maples of the World. Hong Kong: Timber Press, Inc. pp. 107–108. ISBN 0-88192-000-2.
  7. "Acer distylum - Siebold.&Zucc". Ken Fern/Plants for a Future.
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