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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, shrub, tree. Stem: bark often peeling distinctively. Leaf: simple or 0, generally cauline, alternate, opposite (whorled), evergreen or deciduous, often leathery, petioled or not; stipules 0. Inflorescence: raceme, panicle, cyme, or flowers 1, terminal or axillary, generally bracted; pedicel often with 2 bractlets. Flower: generally bisexual, generally radial, bell-shaped, cylindric, or urn-shaped; sepals generally (0)4–5, generally free; petals generally (0)4–5, free or fused; stamens 8–10, free, filaments rarely appendaged, anthers awned or not, dehiscing by pores or slits; nectary generally present at ovary base, generally disk-like; ovary superior or inferior, chambers generally 1–5, placentas axile or parietal, ovules 1–many per chamber, style 1, stigma head- to funnel-like or lobed. Fruit: capsule, drupe, berry. Seed: generally many, winged or not.
± 100 genera, 3000 species: generally worldwide except deserts; some cultivated, especially Arbutus, Arctostaphylos, Rhododendron, Vaccinium. [Kron et al. 2002 Bot Rev 68:335–423] Monophyletic only if Empetraceae included, as treated here. Ledum included in Rhododendron. Non-green plants obtain nutrition from green plants through fungal intermediates. —Scientific Editors: Gary D. Wallace, Thomas J. Rosatti.
Key to Ericaceae
Shrub, tree, glabrous to hairy, burled or not. Stem: erect; bark smooth at first, then shredding or fissured. Leaf: alternate, evergreen, leathery. Inflorescence: panicle, bracted; bractlets 2. Flower: sepals 5, fused at base; corolla urn-shaped, petals 5, fused; stamens 10, anthers dehiscing by short separate gaping slits, awns elongate; ovary superior, papillate, chambers 5. Fruit: berry. Seed: few per chamber.
20 species: North America, Central America, western Europe, Mediterranean, western Asia. (Latin: name for Arbutus unedo L., strawberry tree)
Stem: < 40 m, bark ± red, twigs stout. Leaf: blade < 12 cm, ovate to oblong, glabrous, rounded to pointed at tip, entire to minutely serrate, abaxially ± white, adaxially bright green. Flower: < 8 mm; corolla yellow-white or ± pink. Fruit: < 12 mm, spheric, orange-red, papillate.
2n=26. Conifer, oak forests; 100–1500 m. Northwestern California, High Cascade Range, n&c High Sierra Nevada, Central Western California, n Channel Islands (Santa Cruz Island), Western Transverse Ranges, San Gabriel Mountains, Peninsular Ranges; to British Columbia, Baja California. Mar–May [Online Interchange]
Previous taxon: Arbutus
Next taxon: Arctostaphylos
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 17 2014
Citation for this treatment: [Author of taxon treatment] 2012. Arbutus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=13872, accessed on Apr 17 2014
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