Jepson Herbarium
		University of California, Berkeley

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Indexes to all accepted names and synonyms: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

Tree, shrub, [woody vine].
Leaf: opposite [ alternate], generally palmately or ternately [pinnately] lobed to compound, deciduous, petioled; stipules 0.
Inflorescence: umbel, panicle, or pendent raceme, axillary or terminal.
Flower: unisexual or bisexual, radial or ± bilateral; sepals (4)5, free or fused; petals 0, 4, or 5(6); prominent disk between petals and stamens; stamens 5–12, free; ovary superior, chambers 2–3, each 2[1]-ovuled, style short or 0, stigmas 2(3), linear, or 1, unlobed.
Fruit: 2(3) 1-seeded mericarps, conspicuously winged, or generally leathery, generally 1[many]-seeded capsule [ berry, nut, drupe].
150 genera, 1500 species: ± worldwide. Acer traditionally placed in Aceraceae, Aesculus in Hippocastanaceae. Cupaniopsis anacardioides (A. Rich.) Radlk. possibly naturalizing in s CA. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.
Unabridged references: [Harrington, M.G., K.J. Edwards, S.A. Johnson, M.W. Chase, & P.A. Gadek. 2005. Phylogenetic inference in Sapindaceae sensu lato using plastid matK and rbcL DNA sequences. Syst Bot 30: 366–382.]
Unabridged note: Acer and Aesculus have traditionally been placed in small families (Aceraceae and Hippocastanaceae, respectively). However, virtually all the traits considered characteristic of these two small families are also found in the closely related large family Sapindaceae, and it seems more reasonable to emphasize the close relationship of the whole group by treating it as a single family, rather than maintaining two small segregate families that differ from Sapindaceae in virtually nothing except opposite leaves (Harrington et al. 2005).

Key to Sapindaceae

Shrub, tree; occasionally monoecious.
Inflorescence: umbel, panicle, or pendent raceme.
± 130 species: n hemisphere. (Latin name for Acer campestre) Many species monoecious or dioecious.
Unabridged note: The sexuality of Acer species is complex, with some species described as dioecious or monoecious and many species described as having both unisexual and bisexual flowers on the same tree. However, maple flowers that appear morphologically bisexual may be functionally unisexual, producing functional pollen or ovules but not both. More study of sexuality is needed in our native maples. In some Acer species, fruit may become fully developed even if no seed is set, so that production of morphologically normal fruit is no proof that a plant is reproducing.

Tree < 20 m; dioecious.
Leaf: 1–2- ternate, leaflets 3(9); terminal leaflets 4–11 cm, 3–9 cm wide, toothed, generally 1–2-lobed, abaxial surface green, generally felty, occasionally sparsely pubescent
Inflorescence: panicle axillary, pendent, appearing with leaves, flowers 10–250.
Flower: petals 0.
Fruit: wings spreading 60–90°.
Streamsides, bottomland; < 1800 m. California Floristic Province;

Previous taxon: Acer macrophyllum
Next taxon: Acer saccharinum

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].

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Bioregions in which taxon occurs	Red area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon; markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may have georeferencing or identification issues.
Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates.	Map made in collaboration with Scott Loarie. Data provided by the participants of the Consortium of California Herbaria. View all CCH records   CCH collections by month Duplicates counted once; synonyms included. Species do not include records of infraspecific taxa. Blue line denotes Manual flowering time.