Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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Dieter H. Wilken

Shrub, tree, or vine, some dioecious
Leaves alternate or opposite, deciduous or evergreen, simple to pinnately compound
Inflorescence various; flower sometimes solitary
Flower sometimes unisexual, generally radial; calyx generally minute, tube cup-shaped, lobes 4–15; petals (0)4–6, generally fused; stamens generally 2, epipetalous; pistil 1, ovary superior, chambers 2, placentas axile, ovules 2–4 per chamber, style 1, stigma generally 2-lobed
Fruit: drupe, capsule, or winged achene
Seed 1 per chamber
Genera in family: ± 25 genera, 900 species: ± worldwide; some cultivated for ornamental (Forsythia ; Jasminum , jasmine; Ligustrum , privet; Syringa , lilac) or food (Olea )
Reference: [Wilson & Wood 1959 J Arnold Arbor 40:369–384]



Shrub or tree
Leaves simple, opposite, short-petioled, entire, leathery
Inflorescence: raceme or panicle, axillary or terminal
Flower generally bisexual; calyx 4-toothed to -lobed; corolla rotate, lobes 4
Fruit: drupe
Species in genus: 20 species: tropical, warm temp Eurasia, Africa
Etymology: (Greek: ancient name)


O. europaea L.

Tree generally < 10 m
Stem: bark gray, furrowed
Leaf 20–70 mm, 6–16 mm wide, densely silver-scaly below, dark green and sparsely scaly above
Flower: corolla 2.5–4 mm, lobes > tube, margins inrolled, white
Fruit 9–20 mm, oily, green, becoming black
Chromosomes: 2n=46
Ecology: Generally waif, disturbed places
Elevation: < 200 m.
Bioregional distribution: s North Coast Ranges, Great Central Valley, San Francisco Bay Area, South Coast, n Channel Islands (Santa Cruz Island)
Distribution outside California: introduced widely; native to w Asia
Widely cultivated for (food and) cooking oil in Medit for ± 6000 years.

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bioregional map for OLEA%20europaea being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Olea europaea
Retrieve dichotomous key for Olea
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
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