|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Sapindaceae||View Description||Dichotomous Key|
|Genus: Acer||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Acer glabrum Torr.
Habit: Shrub, small tree, < 6 m; dioecious (or staminate plant with some bisexual flowers). Leaf: 3-lobed (or 3 sessile leaflets) 1/4--3/4(1) of leaf length, at least outer side toothed, teeth 3--22, acute to obtuse; abaxial surface pale green, glabrous. Inflorescence: terminal, ascending, flowers 3--8, appearing after leaves. Flower: petals 2--3 mm, +- = sepals. Fruit: wings spreading (0)70--120°, rarely touching, parallel.
Unabridged Note: Acer glabrum is a very variable sp., but the pattern of variation is confusing. The species has been divided into as many as six varieties, but most of the variation probably results from local selection and clinal variation, not divergence that can be recognized taxonomically. Acer glabrum var. douglasii (Hook.) Dippel is found from northern and eastern Oregon, southern Idaho, south-central Montana north to southern Alaska. This variety has been reported for California, but all specimens seen named as var. douglasii from southern of Lane County, Oregon have been misidentified. Acer glabrum var. douglasii differs from our California plants as follows:
eFlora Treatment Author: Alan T. Whittemore
Jepson Online Interchange
Previous taxon: Acer circinatum
Next taxon: Acer glabrum var. diffusum
Citation for this treatment: Alan T. Whittemore 2016. Acer glabrum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=11736, accessed on December 10, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on December 10, 2016.