Quercus rugosa

Anales Ci. Nat. 3: 275. 1801.
Common names: Netleaf oak
Synonyms: Quercus ariifolia Trelease Quercus diversicolor Trelease Quercus durangensis Trelease Quercus reticulata Humboldt & Bonpland Quercus rhodophlebia Trelease Quercus vellifera Trelease
Treatment appears in FNA Volume 3.

Shrubs or trees, evergreen, usually moderate-sized, rarely large. Bark light or dark brown, scaly. Twigs brown, turning gray with age, 1-2 mm diam., tomentose to tomentulose, variously glabrate or persistently pubescent. Buds brown, ovoid, 2-4 mm, apex obtuse, sparsely pubescent or eventually glabrate. Leaves: petiole to 7 mm. Leaf blade broadly obovate or panduriform to orbiculate or elliptic, rarely narrowly obovate, usually cupped, strongly concave proximally, sometimes planar, to 100 × 70 mm, stiff, leathery, base deeply or shallowly cordate, margins usually somewhat revolute, cartilaginously thickened, undulately crisped or flat with inconspicuous or coarse mucronate teeth near apex, secondary veins 8-10(-12) on each side, branched, apex broadly rounded, rarely subacute; surfaces abaxially dull, glaucous, or densely brownish tomentose, becoming nearly glabrate or pubescence persistent, especially about midribs, secondary veins very prominently raised, reticulate, adaxially dark green, lustrous, sparsely stellate-pubescent especially about base of midrib, secondary veins impressed. Acorns 1-3 or more on slender axillary peduncle 30-60 mm; cup deeply cup-shaped to saucer-shaped, to 9 mm deep × 15 mm wide, enclosing to 1/2 nut, scales loosely appressed, characteristically somewhat spreading, brown, ovate, tuberculate-thickened or only slightly so, tomentose or obscurely tomentulose; nut light brown, ovoid to elliptic, to 20 × 15 mm, glabrous or minutely villous. Cotyledons distinct, often reddish or purple.

Phenology: Flowering early–late spring.
Habitat: Wooded slopes
Elevation: 2000-2500 m


V3 508-distribution-map.gif

Ariz., N.Mex., Tex., Mexico, Central America (Guatemala).


Quercus rugosa occurs on wooded slopes at high elevations in trans-Pecos Texas, southern New Mexico, and Arizona, and throughout most of the mesic montane parts of Mexico, south to Guatemala.

Selected References


Lower Taxa


... more about "Quercus rugosa"
Kevin C. Nixon +
Netleaf oak +
Ariz. +, N.Mex. +, Tex. +, Mexico +  and Central America (Guatemala). +
2000-2500 m +
Wooded slopes +
Flowering early–late spring. +
Anales Ci. Nat. +
Illustrated +
Quercus ariifolia +, Quercus diversicolor +, Quercus durangensis +, Quercus reticulata +, Quercus rhodophlebia +  and Quercus vellifera +
Quercus rugosa +
Quercus sect. Quercus +
species +