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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FAGACEAE

OAK FAMILY

John M. Tucker

Shrub or tree, monoecious, deciduous or evergreen
Leaves simple, alternate, petioled; margin entire to lobed; stipules small, generally deciduous
Staminate inflorescence: catkin or stiff spike; flowers many
Pistillate inflorescence 1–few-flowered, generally above staminate inflorescence; involucre in fruit generally cup-like or lobed and bur-like, bracts many, generally overlapping, flat or cylindric
Staminate flower: sepals generally 5–6, minute; petals 0; stamens 4–12+
Pistillate flower: calyx generally 6-lobed, minute; petals 0; ovary inferior, style branches generally 3
Fruit: acorn (nut subtended by scaly, cup-like involucre) or 1–3 nuts subtended by spiny, bur-like involucre; nut maturing in 1–2 years
Seed generally 1
Genera in family: 7 genera, ± 900 species: generally n hemisphere. Wood of Quercus critical for pre-20th century ship-building, charcoal for metallurgy; some now supply wood (Fagus, Quercus ), cork (Q. suber ), food (Castanea , chestnut).

CHRYSOLEPIS

CHINQUAPIN

Evergreen
Leaf leathery; margin entire or slightly wavy above middle; upper surface ± glabrous, green; lower surface golden, with densely spaced, minute, appressed scales; stipules generally deciduous
Staminate inflorescence simple, sometimes branched, stiff, solitary or clustered, ascending to erect
Pistillate inflorescence clustered below staminate inflorescence on same or separate stalk; flowers 1–3
Staminate flower: sepals generally 6, minute; stamens generally 8–10+
Pistillate flower: sepals generally 6, minute
Fruit: nuts 1–3, enclosed by spiny, bur-like involucre, ovoid to subspheric, ± angled, maturing in 2 years
Species in genus: 2 species: w North America
Etymology: (Greek: golden scale, from lower leaf surface)
Reference: [Hjelmqvist 1960 Bot Not 113:373–380]
Asian Castanopsis has involucre with 7 free valves (5 outer, 2 inner separating 3 nuts).

Native

C. chrysophylla (Hook.) Hjelmq.

GIANT CHINQUAPIN

Shrub or tree < 30(45) m; top ± conic
Stem: trunk bark ± thick, rough, furrowed
Leaf: petiole 5–12 mm; blade 5–15 cm, lanceolate to oblong, base tapered, tip abruptly long-tapered; upper surface dark green; lower surface golden
Fruit: bur 3–5 cm diam; nut 6–15 mm
Ecology: Coniferous forest, closed-cone-pine forest, chaparral
Elevation: < 2000 m.
Bioregional distribution: Northwestern California, n Cascade Range, n High Sierra Nevada (El Dorado Co.), Central Western California (except Inner South Coast Ranges)
Distribution outside California: to Washington
Horticultural information: DRN: 4, 5, 6, 15, 16, 17 &IRR: 1, 2, 3, 7, 14, 18; DFCLT

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bioregional map for CHRYSOLEPIS%20chrysophylla 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 Chrysolepis chrysophylla
Retrieve dichotomous key for Chrysolepis
Overlay Consortium of California Herbaria specimen data by county on this map
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