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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 (2–5)8–10, free, filaments rarely appendaged, anthers dehiscing by pores or slits, awns 0 or 2(4), seemingly abaxial, reduced or elongate, generally curved; 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 to tree, glabrous, hairy, and/or with glandular scale-like hairs. Stem: prostrate to erect, bark thin, sometimes peeling or shredding. Leaf: alternate, evergreen or deciduous, ovate to obovate to elliptic, margin entire, flat to rolled under. Inflorescence: raceme, 1–many-flowered, bracts green to red-brown. Flower: sepals, petals generally 5, corolla radial to bilateral, 1–5 cm, petals free to ± fused, spots or blotch present or 0; anther awns 0; ovary superior. Fruit: capsule, septicidal, dehiscing base to tip or tip to base, placentas axile. Seed: many, fusiform, ± flat to not, wings and/or tails present or 0.Key to Rhododendron
± 1000 species: northern hemisphere, tropical Asia, to Australia. (Greek: rose tree)
Unabridged references: [Chamberlain 1982. Notes Roy. Bot. Gard. Edinburgh 39:209–486; Cullen 1980 Notes Roy. Bot. Gard. Edinburgh 39:1–207]
Hairs sparse to dense, glandular or not. Stem: <= 8 m, densely branched, hairy. Leaf: (2.5)3.5–8.2(10.8) cm, (0.8)1.2–2.9(3.6) cm wide, deciduous, margin ciliate. Inflorescence: short, 3–15-flowered, bracts red-brown, margins ciliate or glandular. Flower: corolla widely funnel-shaped, white to pink to salmon, upper petal yellow- to orange-blotched; stamens 5, ± equal. Fruit: longer than wide, dehiscing tip to base. Seed: ovate to fusiform, coat expanded around seed.
2n=26. Streambanks, ocean bluffs, moist wooded slopes and canyon bottoms, serpentine ridges; < 2700 m. Northwestern California (except High North Coast Ranges), High Cascade Range, n Sierra Nevada Foothills, High Sierra Nevada, Great Central Valley, Central Coast, San Francisco Bay Area, n Inner South Coast Ranges, Peninsular Ranges; Oregon. Apr–Aug [Online Interchange]
Previous taxon: Rhododendron macrophyllum
Next taxon: Sarcodes
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 28 2015
Citation for this treatment: [Author of taxon treatment] 2013. Rhododendron, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=41152, accessed on Apr 28 2015
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Charles Thoreau Townsend © 1999 California Academy of Sciences
|Geographic subdivisions indicated for the distribution of Rhododendron occidentale|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
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