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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Shrub, tree, evergreen or not; monoecious. Leaf: simple, alternate, petioled; margin entire to lobed; stipules small, generally deciduous. Staminate inflorescence: catkin or stiff spike, many-flowered. Pistillate inflorescence: 1–few-flowered, generally above staminate inflorescence; involucre bracts many, generally overlapping, flat or cylindric. Staminate flower: calyx generally 4–6-lobed, minute; petals 0; stamens 4–12+. Pistillate flower: calyx generally 6-lobed, minute; petals 0; ovary inferior, style branches generally 3. Fruit: 1 nut subtended, partly enclosed by scaly, cup-like involucre or 1–3 nuts subtended, enclosed by spiny, bur-like involucre; mature years 1–2. Seed: generally 1.
7 genera, ± 900 species: generally northern hemisphere. [Li et al. 2004 Int J Plant Sci 165:311–324] Wood of Quercus critical for pre-20th century ship-building, charcoal for metallurgy; some now supply wood (Fagus, Quercus), cork (Quercus suber), food (Castanea, chestnut). Lithocarpus densiflorus moved to Notholithocarpus. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Li, R.-Q., Chen, Z.-D., Lu, A.-M., Soltis, D. E., Soltis, P. S., & Manos, P. S. 2004. Phylogenetic relationships in Fagales based on DNA sequences from three genomes. Int. J. Plant Sci. 165: 311–324.]
Key to Fagaceae
Evergreen or not. Leaf: stipules small, generally early-deciduous. Staminate inflorescence: catkins, 1–several, pendent, slender, proximal on twig. Pistillate inflorescence: in upper leaf axils, short-stalked; flower generally 1. Staminate flower: stamens 4–10. Pistillate flower: calyx minute, generally 6-lobed; ovary enclosed by involucre. Fruit: nut 1, partly enclosed by cup-like involucre (cup) with appressed scales (nut and cup = acorn); scales tubercled to not; mature years 1 (on younger stems) or 2 (on older stems).Key to Quercus
± 600 species: northern hemisphere, to northern South America, India. (Latin: ancient name for oak) [Manos et al. 1999 Molec Phylogen Evol 12:333–349] Many named hybrids; those (3) treated here form widespread populations; most others occur as single individuals, and some but not all of these are mentioned here, under the first parent treated (alphabetically). Reproduction of many species declining due to habitat degradation or loss as well as disease.
Unabridged references: [Manos, P. S., Doyle, J. J., & Nixon, K. C. 1999. Phylogeny, biogeography, and processes of molecular differentiation of Quercus subgenus Quercus (Fagaceae). Molec Phylogen Evol 12: 333–349.]
Shrub 1–5 m to tree 8–20 m, deciduous; trunk bark thin, in age widely ridged, scaly, ± gray; twigs short-hairy, ± green, glabrous in age, red-brown. Leaf: 5–15 cm; petiole 5–25 mm; blade elliptic to obovate, adaxially shiny, dark green, abaxially short-hairy, dull, light green, tip obtuse to rounded, margin lobes 5–7 per leaf, deep, entire or 2-toothed. Fruit: cup 12–25 mm wide, 4–9 mm deep, cup- to bowl-shaped, lower scales ± tubercled, upper ± not; nut 20–30 mm, ovoid to ± spheric, tip rounded, shell glabrous inside; mature year 1. [Online Interchange]
Shrub, spreading, with multiple trunks. Stem: terminal buds 3–5 mm, ovoid, hairs sparse, brown or ± red. Leaf: blade 5–9 cm, abaxially with erect hairs, rays of stellate hairs generally 4–6, 0.25–0.5 mm.
Mtn slopes, conifer forest, maritime chaparral; (150)1400–2000 m. Klamath Ranges, High North Coast Ranges, Central Coast (nw San Luis Obispo Co.); to Oregon. Hybridizes with Quercus sadleriana. Apr–Jun [Online Interchange]
Previous taxon: Quercus garryana
Next taxon: Quercus garryana var. garryana
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 23 2014
Citation for this treatment: [Author of taxon treatment] 2013. Quercus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=64727, accessed on Jul 23 2014
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|Quercus garryana var. breweri|
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Charles Webber © 1998 California Academy of Sciences
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