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, generally dioecious
Stem: bark smooth to furrowed, generally gray; twigs generally puberulent, becoming glabrous
Leaves opposite, deciduous, odd-pinnate, petioled, generally thin, generally glabrous; leaflet dark green above, pale below, generally glabrous, base and tip rounded to acute
Inflorescence: clusters or panicles, axillary, often peduncled; flowers pedicelled
Flower: calyx 1–2 mm, shallowly ± 4-lobed; petals 0, 2, or 4, free or fused
Staminate flower: stamens generally 2; pistil vestigial
Pistillate flower: stamens 0; ovules 2 per chamber
Fruit: achene, winged
Seed generally 1
Species in genus: ± 65 species: temp North America, Eurasia, tropical Asia
Etymology: (Latin: ancient name)
Reference: [Little 1952 J WA Acad Sci 42:369–380]


F. dipetala Hook. & Arn.


Shrub or tree < 7 m
Stem: twigs cylindric to 4-angled
Leaf 5–19 cm; petiole (sub)glabrous; leaflets 3–7(9), 1–7 cm, short-stalked to subsessile, (ob)ovate to ± round, generally serrate
Flower generally bisexual; petals 2, 2.5–4 mm, white
Fruit 20–32 mm, 5–9 mm wide; body flat, winged from near base
Chromosomes: 2n=46
Ecology: Canyons, slopes, chaparral, oak/pine woodland
Elevation: 100–1300 m.
Bioregional distribution: North Coast Ranges, Cascade Range Foothills, n Sierra Nevada Foothills, c&s Sierra Nevada, Central Western California, Transverse Ranges, Peninsular Ranges
Horticultural information: DRN: 7, 14, 15, 16, 17, 22, 23, 24 &IRR: 8, 9, 18, 19, 20, 21.

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bioregional map for FRAXINUS%20dipetala 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 Fraxinus dipetala
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