Quercus incana |
Quercus myrtifolia |
|
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bluejack oak |
myrtle oak |
|
Habit | Trees, deciduous, to 10 m. Bark dark brown to black with square plates. | Trees or shrubs, evergreen, to 12 m. Bark gray and smooth distally, dark and shallowly furrowed near base. |
Twigs | brown to reddish brown, 1-2.5 mm diam., tomentose to sparsely pubescent. |
dark red-brown, 1-2.5(-3) mm diam., persistently pubescent, rarely almost glabrous. |
Leaves | blade narrowly ovate or elliptic to obovate, usually widest near middle, planar, 30-100 × 12-35 mm, base acute (rarely attenuate) to rounded, margins entire, with 1 apical awn (leaves on juvenile or 2d-flush growth may have 2-3 shallow lobes and 3-5 awns), apex acute or obtuse, rarely rounded; surfaces abaxially densely tomentose, hairs in vein axils often reddish, easily distinguished from others, adaxially often glossy, sparsely pubescent, especially along midrib and near base, veins often raised. |
blade elliptic to narrowly or broadly obovate, occasionally spatulate, 15-50(-70) × 10-25(-35) mm, base cuneate to rounded, margins entire, somewhat revolute, with 1-4 awns, apex obtuse or rounded; surfaces abaxially glabrous except for axillary tufts of tomentum, occasionally yellow-scurfy, adaxial surface planar, glabrous. |
Acorns | biennial; cup saucer-shaped to bowl-shaped, 4.5-8 mm high × 10-18 mm wide, covering 1/4-1/3(-1/2) nut, outer surface pubescent or puberulent, inner surface uniformly pubescent, scale tips tightly appressed, obtuse or acute; nut ovoid (rarely subglobose) to broadly ellipsoid, 10-17 × 10-16 mm, occasionally striate, glabrate, scar diam. 5.5-10.5 mm. |
biennial; cup saucer-shaped to shallowly goblet-shaped, 4-7 mm high × 8.5-14.5 mm wide, covering 1/4-1/3 nut, outer surface puberulent, inner surface half to fully pubescent, scale tips tightly appressed, acute; nut broadly ovoid to globose, 9.5-14 × 8-13 mm, glabrate, scar diam. 5-8 mm. |
Terminal | buds light brown to reddish brown, narrowly ovoid to conic, 3.5-7 mm, distinctly 5-angled in cross section, scales pubescent, often tuft of reddish or silvery hairs at apex. |
buds reddish to purplish brown, ovoid, 2-5.5 mm, glabrous or with tuft of tawny hairs at apex. |
Quercus incana |
Quercus myrtifolia |
|
Phenology | Flowering spring. | Flowering spring. |
Habitat | Well-drained sandy soils of barrens, hammocks, dunes, and upland ridges | Dunes, hammocks, sandhills, dry sandy ridges, and oak scrub |
Elevation | 0-250 m (0-800 ft) | 0-100 m (0-300 ft) |
Distribution |
AL; AR; FL; GA; LA; MS; NC; OK; SC; TX; VA
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AL; FL; GA; MS; SC
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Discussion | Quercus incana reportedly hybridizes with Q. falcata [= Q. ×subintegra (Engelmann) Trelease], Q. hemisphaerica (D. M. Hunt 1989), Q. laurifolia (= Q. ×atlantica Ashe), Q. laevis (= Q. ×asheana Little), Q. marilandica (= Q. ×cravenensis Little), Q. nigra (= Q. ×caduca Trelease), and Q. phellos (E. J. Palmer 1948); with Q. pumila (D. M. Hunt 1989); and with Q. velutina (= Q. ×podophylla Trelease), and questionably, Q. myrtifolia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
This species flowers one to two weeks earlier than Q. inopina (A. F. Johnson and W. G. Abrahamson 1982). Quercus myrtifolia reportedly hybridizes with Q. incana (= Q. ×oviedoensis Sargent), but E. J. Palmer (1948) questioned the identification of the type specimen; the brief description by Sargent suggests that the specimen may be from an individual of Q. inopina. D. M. Hunt (1989) cited evidence of hybridization with Q. arkansana, Q. hemisphaerica, Q. inopina, Q. laurifolia, Q. marilandica, Q. nigra, and Q. pumila (Hunt suggested that the last may give rise to occasional reports of annual fruiting in Q. myrtifolia). (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. cinerea | |
Name authority | W. Bartram: Travels Carolina, 378. (1791) | Willdenow: Sp. Pl. 4(1): 424. (1805) |
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