Quercus chapmanii |
Quercus sadleriana |
|
---|---|---|
Chapman oak, Chapman's oak |
deer oak, sadler oak |
|
Habit | Shrubs, deciduous or subevergreen, 0.5-3(-6) m, often rhizomatous. | Shrubs, evergreen, to 1-3 m, rhizomatous. |
Bark | brown, scaly. |
gray, smooth. |
Twigs | yellowish, 1-2 mm diam., densely fine-tomentulose. |
reddish or brown, pruinose, 3-4 mm diam., glabrous, sometimes sparsely puberulent around buds. |
Buds | reddish brown, globose, 1-2(-3) mm, proximal scales densely tomentulose, distal scales glabrous. |
yellowish or tan, broadly ovoid or globose, 8-10 mm; scales loose, acute-ovate, silky. |
Leaves | blade obovate or oblanceolate, 30-70(-85) × 14-30(-45) mm, base cuneate or attenuate, margins minutely revolute, entire or sinuately lobed, sometimes obscurely 3-lobed distally or with 3-5 rounded, irregular lobes in distal 1/2, secondary veins curved, 8-9 on each side, apex ovate or triangular-lobed, often retuse; surfaces abaxially grayish or yellowish, with yellowish, erect branched hairs, these soon shed, leaving matted glandular and waxy hairs except on ± glabrate yellowish veins, adaxially bright glossy, very reflective, glabrous or with minute, scattered, stellate hairs. |
blade obovate or elliptic, 70-140 × 35-80 mm, base rounded or rounded-acuminate, rarely subcordate, margins serrate, not deeply lobed, teeth antrorse-acuminate, sharply mucronate, secondary veins prominent, parallel, straight, (8-)10-15 on each side, apex acuminate or acute; surfaces abaxially light green, waxy, with sparse or scattered, minute, asymmetric, appressed, 4-8-rayed stellate hairs 0.1-0.2 mm diam., and prominent raised stomates giving surface minute granular appearance, adaxially dark green, glabrous. |
Acorns | 1-2, on peduncle 1-6(-35) mm; cup hemispheric, 5-11 m deep × 10-15 mm wide, including 1/3-1/2 nut, scales closely appressed, gray, tomentulose; nut light brown, ovoid to barrel-shaped, 15-20 × 9-13 mm, apex rounded, glabrous or puberulent. |
solitary or paired, subsessile; cup hemispheric or funnel-shaped, 7-9 mm deep × 10-18 mm wide, scales gray, moderately tuberculate, tips reddish brown; nut light brown, ovoid or subglobose, 15-20 × 10-15 mm. |
Cotyledons | distinct. |
distinct. |
Quercus chapmanii |
Quercus sadleriana |
|
Phenology | Flowering late winter–early spring. | Flowering spring. |
Habitat | Open pine forests, scrublands, xerophytic scrub oak, on sand near coast | Open slopes in coniferous forest |
Elevation | 0-100 m (0-300 ft) | 600-2200 m (2000-7200 ft) |
Distribution |
FL; GA; SC
|
CA; OR
|
Discussion | Quercus sadleriana is one of the most distinctive western oaks, with strong similarities to certain eastern North American and Asian species of Quercus with "chestnut" leaves. Its restricted distribution in the Siskiyou region and uncertain relationships suggest it is a relictual species. It hybridizes occasionally with Q. garryana var. breweri (see treatment). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Fagaceae > Quercus > sect. Quercus | Fagaceae > Quercus > sect. Quercus |
Sibling taxa | ||
Name authority | Sargent: Gard. & Forest 8: 93. (1895) | R. Brown ter: Ann. Mag. Nat. Hist., ser. 4, 7: 249. (1871) |
Web links |