Quercus ellipsoidalis
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Scan day: 05 March 2014 UTC
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Description: Facts on physical characteristics, habitat, and range. Provides distribution map.
Quercus ellipsoidalis in Flora of North America @ efloras.org E. J. Hill, Bot. Gaz. 27: 204, plates 2, 3. 1899. Northern pin oak, jack oak, Hill's oak Trees , deciduous, to 20 m; lower trunk often with stubs of dead branches. Bark dark gray-brown, shallowly fissured, inner bark orangish. Twigs dark reddish brown, (1-)1.5-3 mm diam., glabrous. Terminal buds dark reddish brown, ovoid, 3-5 mm, often conspicuously 5-angled in cross section, usually silvery- or tawny-pubescent toward apex. Leaves: petiole 20-50 mm, glabrous. Leaf blade elliptic, 70-130 × 50-100 mm, base obtuse to truncate, margins with 5-7 deep lobes and 15-55 awns, lobes distally expanded, sinuses usually extending more than 1/2 distance to midrib, apex acute; surfaces abaxially glabrous except for minute axillary tufts of tomentum, adaxially glossy light green, glabrous, secondary veins raised on both surfaces. Acorns biennial; cup narrowly turbinate to deeply cup-shaped, 6-11 mm high × 10-19 mm wide, covering 1/3-1/2 nut, outer surface reddish brown, puberulent, inner surface light brown, glabrous, rarely with ring of pubescence around scar, scales with straight or slightly concave margins, tips tightly appressed, obtuse or acute; nut ellipsoid to ovoid, rarely subglobose, 10-20 × 9-15 mm, occasionally striate, glabrous, occasionally with 1 or more faint rings of fine pits at apex, scar diam. 4-8 mm.
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| Page title: | Quercus ellipsoidalis in Flora of North America @ efloras.org |
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| Date | Creation Date: 2003-08-14T15:34:40Z Expiry Date: 2014-08-14T15:34:40Z |