Quercus toumeyi


Gard. & Forest 8: 92. 1895.

Common names: Toumey oak
Synonyms: Quercus hartmanii Trelease
Treatment appears in FNA Volume 3.

Shrubs or small trees, deciduous or subevergreen. Bark dark gray to almost black, scaly. Twigs brownish, 1-2 mm, usually persistently pubescent. Buds reddish brown, ovoid, ca. 1 mm. Leaves: petiole 2-3.5 mm. Leaf blade oblong-elliptic or lanceolate, 15-25(-30) × (6-)8-12(-15) mm, base obtuse or cuneate, rarely subcordate, margins strongly cartilaginous, entire, sometimes sparsely mucronate-dentate toward apex, secondary veins 7-8 on each side, apex acute, sometimes rounded; surfaces abaxially dull gray, microscopically pubescent with long, soft, white or yellow hairs concentrated in tufts along midvein and base, adaxially glossy green, sparsely minutely stellate-pubescent or glabrate. Acorns solitary or paired, subsessile or on peduncle 2 mm; cup cup-shaped, 6 mm deep × ca. 8-9 mm wide, enclosing ca. 1/3 nut, scales moderately tuberculate; nut light brown, narrowly ovoid or elliptic, 8-15 × 6-8 mm. Cotyledons distinct.

Phenology: Flowering spring.
Habitat: Rocky slopes, oak woodlands, and open chaparral
Elevation: 1500-1800 m


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Ariz., N.Mex., Tex., Mexico (Chihuahua and Sonora).


Quercus toumeyi, particularly the more spinescent-leaved form, is often confused with Q. turbinella. The latter species has acorns on peduncles greater than 10 mm, and more or less evenly distributed minute, flat, stellate trichomes on the abaxial leaf surface, in contrast to the subsessile acorns and longer straight hairs along the midvein of the abaxial leaf surface in Q. toumeyi.

Selected References


Lower Taxa

... more about "Quercus toumeyi"
Kevin C. Nixon +  and Cornelius H. Muller +
Sargent +
Toumey oak +
Ariz. +, N.Mex. +, Tex. +  and Mexico (Chihuahua and Sonora). +
1500-1800 m +
Rocky slopes, oak woodlands, and open chaparral +
Flowering spring. +
Gard. & Forest +
Illustrated +
Quercus hartmanii +
Quercus toumeyi +
Quercus sect. Quercus +
species +