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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Perennial herb to tree [vine], hairs 0 or peltate or not; rarely dioecious. Leaf: simple to odd-pinnately compound, alternate or generally opposite, deciduous or evergreen; stipules 0. Inflorescence: various; flowers >= 1. Flower: generally bisexual, generally radial; calyx generally minute (0), tube cup-shaped, lobes 4–15; petals (0)4–6(8), generally fused; nectar disk often present; stamens (0)2(4–5), epipetalous; pistil 1, ovary superior, chambers 2, each 2–4 ovuled, placenta axile, style 1, stigma generally 2-lobed. Fruit: drupe, capsule, or winged achene. Seed: 1 per chamber.
± 25 genera, 900 species: ± worldwide; some cultivated for ornamental (Forsythia; Jasminum, jasmine; Ligustrum, privet; Syringa, lilac) or food (Olea, olive). [Lee et al. 2007 Molec Biol Evol 24:1161–1180] —Scientific Editor: Bruce G. Baldwin.
Unabridged references: [Jensen et al. 2002 Phytochemisty 60:213–231; Kim & Jansen 1998 Amer J Bot 85(6): Suppl. 139; Wallander & Albert 2000 Amer J Bot 87(12):1827–1841]
Key to Oleaceae
Shrub or tree; generally dioecious, often bisexual (in California). Stem: older bark smooth or becoming furrowed, generally gray; lenticels broadly elliptic; twigs cylindric to 4-angled, glabrous to hairy; developing short-shoot spurs. Leaf: simple or generally odd-pinnate, opposite, deciduous; petioles channeled, occasionally winged, hairy or not; if compound, leaflets (1)3–9, lanceolate to ovate or obovate, generally acute to acuminate at tip, entire or ± crenate-serrate, generally dark green adaxially, pale abaxially, thin to ± leathery in drier habitats, generally glabrous or with simple hairs abaxially or throughout, proximal opposite on rachis, stalked or not, terminal generally largest, stalk longer. Inflorescence: axillary, of clusters or long-branched panicles; flowers pedicelled. Flower: unisexual or bisexual; calyx 1–2 mm, shallowly ± 4-lobed to cut, persistent on fruit; petals 0, 2, or 4, free or fused to basal filaments. Staminate flower: stamens 2(3); pistil vestigial. Pistillate flower: stamens 0; style slender; ovules 2 per chamber. Fruit: achenes, winged, wings generally flat, extending to tip or base of seed-containing chamber. Seed: generally 1.Key to Fraxinus
± 65 species: temperate. North America, Eurasia, tropical Asia. (Latin: ancient name) [Little 1952 J Washington Acad Sci 42:369–380; Miller 1955 Cornell Univ Agric Exp Sta Mem 335:1–64] Fraxinus uhdei (Wenzig) Lingelsheim, Mexican ash, cultivated in western United States; similar to Fraxinus velutina, with ± larger leaves and leaflets, generally with stiff hairs to 0.5 mm bordering abaxial midvein and occasionally 2° veins abaxially (as occasionally in Fraxinus velutina), and ± larger fruit, but margins tapered to near base of fruit body; native northern Mexico to Honduras.
Tree < 25 m, trunk < 1.5 m diam; dioecious. Stem: bark gray-brown, furrowed; twigs cylindric, brown-gray, ± long-shaggy-hairy or glabrous. Leaf: compound, 12–33(50) cm, ± long-shaggy-hairy or glabrous; petioles 3–7(9) cm, channeled; leaflets (3)5–7, 4–11(14) cm, 2.4–7.5 cm wide, ovate or oblong-(ob)ovate, broadly wedge-shaped to ± rounded at base, acuminate at tip, entire to ± serrate, lateral leaflets ± sessile, terminal leaflet ± larger, stalk to 10–35 mm. Flower: petals 0. Staminate flower: calyx > 0.5 mm, 4-toothed; anthers 2, 2–3.5 mm. Pistillate flower: calyx ± 1 mm, finely irregularly cut; style ± 3 mm; stigma ± 1.3 mm. Fruit: 25–50 mm, 5–9 mm wide; body 15–18 mm, ± cylindric, wing flat, extending proximally as tapering margin down 1/2–3/4 body; fruit pedicel tip much expanded.
2n=46. Canyons, streambanks, woodland; < 1700 m. Northwestern California, Cascade Range, Sierra Nevada, Great Central Valley, San Francisco Bay Area, Modoc Plateau; to British Columbia. Pure in northern California; mostly introgressed with Fraxinus velutina in southern California. Mar–May [Online Interchange]
Unabridged synonyms: [Fraxinus oregona Nutt.; Fraxinus pennsylvanica subsp. oregona (Nutt.) G.N. Mill.]
Previous taxon: Fraxinus dipetala
Next taxon: Fraxinus parryi
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Mar 10 2014
Citation for this treatment: [Author of taxon treatment] 2012. Fraxinus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=26105, accessed on Mar 10 2014
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