Quercus kelloggii |
Quercus georgiana |
|
---|---|---|
California black oak, Kellogg oak |
Georgia oak, stone mountain oak |
|
Habit | Trees, deciduous, to 25 m. Bark dark brown to black, ridges broad, irregular. | Trees, deciduous, to 15 m. Bark gray to light brown, scaly. |
Twigs | brown to red-brown, (1.5-)2-3.5 mm diam., glabrate. |
deep red, 1-2 mm diam., glabrous. |
Leaves | blade ovate or broadly elliptic to obovate, 60-200 × 40-140 mm, base cordate to obtuse, occasionally rounded, margins with 7-11 lobes and 13-45 awns, lobes acute to distally expanded, separated by deep sinuses, apex acute; surfaces abaxially glabrous with small axillary tufts of tomentum to densely pubescent, adaxially glabrous to minutely pubescent, veins raised on both surfaces. |
blade broadly ovate to elliptic or obovate, 40-130 × 20-90 mm, base cuneate to obtuse, margins with 3-5(-7) oblong lobes and up to 10 awns, apex acute; surfaces abaxially glabrous except for conspicuous axillary tufts of tomentum, veins raised, adaxially planar, glabrous. |
Acorns | biennial; cup saucer-shaped to deeply bowl-shaped, 13-27 mm high × 20-28 mm wide, covering 1/2-2/3 nut, outer surface glabrous to sparsely puberulent, inner surface 1/3 to completely pubescent, scales more than 4 mm long, attenuate or acuminate to acute, smooth, occasionally tuberculate near base of cup, tips loose, especially at margin of cup; nut oblong to broadly ellipsoid, 21-34 × 14-22 mm, puberulent, especially at apex, scar diam. 5.5-10.5 mm. |
biennial; cup thin, saucer-shaped, 4-6 mm high × 9-14 mm wide, covering 1/3 nut, outer surface puberulent, inner surface glabrous or with a few hairs around scar, scale tips appressed, acute; nut globose or ovoid, 9-14 × 9-14 mm, glabrous, scar diam. 4-7.5 mm. |
Terminal | buds chestnut brown, ovoid, 4-10 mm, glabrous or with scales ciliate on margins. |
buds red-brown, ovoid to subconic, 2.5-5 mm, glabrous or scales somewhat ciliate. |
2n | = 24. |
|
Quercus kelloggii |
Quercus georgiana |
|
Phenology | Flowering late spring. | Flowering spring. |
Habitat | On slopes and valleys of hills and mountains | Granitic outcrops and dry slopes and knolls |
Elevation | 300-2400 m (1000-7900 ft) | 50-500 m (200-1600 ft) |
Distribution |
CA; OR
|
AL; GA; SC
|
Discussion | The abundant crops of acorns from Quercus kelloggii were at one time an important food source for Native Americans. The species reportedly hybridizes with Quercus agrifolia (= Q. ×ganderi C. B. Wolf) and Q. wislizenii (= Q. ×morehus Kellogg). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Quercus georgiana reportedly hybridizes with Q. marilandica (= Q. ×smallii Trelease) and Q. nigra, although D. M. Hunt (1989) has questioned the validity of the former report. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Fagaceae > Quercus > sect. Lobatae | Fagaceae > Quercus > sect. Lobatae |
Sibling taxa | ||
Synonyms | Q. californica, Q. tinctoria var. californica | |
Name authority | Newberry: Pacif. Railr. Rep. 6: 28, 89, fig. 6. (1859) | M. A. Curtis: Amer. J. Sci. Arts, ser. 2, 7: 406. (1849) |
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