Belongs within: Sapindales.
Acer, the maples, is a genus of trees and shrubs found in temperate regions of the Northern Hemisphere (Hickman 1993). Many species are widely grown as ornamentals.
Characters (from Hickman 1993): Leaf simple or pinnately compound. Inflorescence with flower clusters drooping, generally appearing before or with emerging leaves. Fruit paired, each with elongate wing ribbed on the proximal side.
<==Acer |--A. arcticum CBH93 |--A. buergerianum [incl. A. trifidum] LO98 |--A. campestre ZB01 |--A. caudatum O88 |--A. circinatum H93 |--A. cissifolium LO98 |--A. dasycarpum J23 |--A. glabrum H93 | |--A. g. var. glabrum H93 | |--A. g. var. diffusum H93 | |--A. g. var. greenei H93 | `--A. g. var. torreyi H93 |--A. grandidentatum A02 |--A. macrophyllum H93 |--A. mono T03 |--A. monspessulanum H91 |--A. negundo O01 | |--A. n. var. negundo H93 | `--A. n. var. californicum H93 |--A. nigrum MS98 |--A. palmatum LO98 |--A. platanoides RB05 |--A. pseudoplatanus D01 |--A. rubrum ZB01 |--A. rufinerve LO98 |--A. saccharinum O01 |--A. saccharum O01 |--A. sempervirens SL06 |--A. sieboldianum S00 |--A. subintegrilobum Ettingshausen 1886 F71 |--A. subproductum Ettingshausen 1886 F71 |--A. tataricum S-TG10 `--A. turkestanicum P93
*Type species of generic name indicated
References
[A02] Anderson, R. S. 2002. Curculionidae Latreille 1802. In: Arnett, R. H., Jr, M. C. Thomas, P. E. Skelley & J. H. Frank (eds) American Beetles vol. 2. Polyphaga: Scarabaeoidea through Curculionoidea pp. 722–815. CRC Press.
[CBH93] Collinson, M. E., M. C. Boulter & P. L. Holmes. 1993. Magnoliophyta (‘Angiospermae’). In: Benton, M. J. (ed.) The Fossil Record 2 pp. 809–841. Chapman & Hall: London.
[D01] Doweld, A. B. 2001. The systematic relevance of fruit and seed structure in Bersama and Melianthus (Melianthaceae). Plant Systematics and Evolution 227: 75–103.
[F71] Fletcher, H. O. 1971. Catalogue of type specimens of fossils in the Australian Museum, Sydney. Australian Museum Memoir 13: 1–167.
[H93] Hickman, J. C. (ed.) 1993. The Jepson Manual: Higher Plants of California. University of California Press: Berkeley (California).
[H91] Hubálek, Z. 1991. Biogeographic indication of natural foci of tick-borne infections. In: Dusbábek, F., & V. Bukva (eds) Modern Acarology: Proceedings of the VIII International Congress of Acarology, held in České Budĕjovice, Czechoslovakia, 6–11 August 1990 vol. 1 pp. 255–260. SPB Academic Publishing: The Hague.
[J23] James, E. 1823. Account of an Expedition from Pittsburgh to the Rocky Mountains, performed in the years 1819 and ’20, by order of the Hon. J. C. Calhoun, sec’y of war: under the command of Major Stephen H. Long. From the notes of Major Long, Mr. T. Say, and other gentlemen of the exploring party vol. 1. H. C. Carey & I. Lea: Philadelphia.
[LO98] Lack, H. W., & H. Ohba. 1998. Die Xylothek des Chikusai Kato. Willdenowia 28: 263–276.
[MS98] Margulis, L., & K. V. Schwartz. 1998. Five Kingdoms: An Illustrated Guide to the Phyla of Life on Earth 3rd ed. W. H. Freeman and Company: New York.
[O88] Ohba, H. 1988. The alpine flora of the Nepal Himalayas: an introductory note. In: Ohba, H., & S. B. Malla (eds) The Himalayan Plants vol. 1. The University Museum, University of Tokyo, Bulletin 31: 19–46.
[O01] Ozman, S. K. 2001. The life history and population development of Rhyncaphytoptus negundivagrans Farkas (Acari: Diptilomiopidae). In: Halliday, R. B., D. E. Walter, H. C. Proctor, R. A. Norton & M. J. Colloff (eds) Acarology: Proceedings of the 10th International Congress pp. 352–354. CSIRO Publishing: Melbourne.
[P93] Pittaway, A. R. 1993. The Hawkmoths of the Western Palaearctic. Harley Books: Colchester.
[RB05] Ruczyński, I., & W. Bogdanowicz. 2005. Roost cavity selection by Nyctalus noctula and N. leisleri (Vespertilionidae, Chiroptera) in Białowieża Primeval Forest, eastern Poland. Journal of Mammalogy 86 (5): 921–930.
[SL06] Schulz, H.-J., & P. Lymberakis. 2006. First contribution to the knowledge of the Collembola fauna of the White Mountains (Lefká Óri) in west Crete (Insecta, Collembola, Isotomidae). Senckenbergiana Biologica 86 (2): 229–234.
[S00] Siddiqi, M. R. 2000. Tylenchida: Parasites of plants and insects 2nd ed. CABI Publishing: Wallingford (UK).
[S-TG10] Simova-Tošić, D., D. Graora, R. Spasić & D. Smiljanić. 2010. Oligotrophus betheli Felt (Diptera: Cecidomyiidae), a new species in the fauna of Europe. Arch. Biol. Sci. 62 (4): 1219–1221.
[T03] Tsurusaki, N. 2003. Phenology and biology of harvestmen in and near Sapporo, Hokkaido, Japan, with some taxonomical notes on Nelima suzukii n. sp. and allies (Arachnida: Opiliones). Acta Arachnologica 52: 5–24.
[ZB01] Zhang, N., & M. Blackwell. 2001. Molecular phylogeny of dogwood anthracnose fungus (Discula destructiva) and the Diaporthales. Mycologia 93 (2): 355–365.