Oaks of the World

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  Quercus convallata
Author Trel. 1924 Mem. Natl. Acad. Sci. 20: 88 1924
Diagnosis here
Synonyms reticulata f. inclusa (Trel.) A.Camus 1935
reticulata f. apus (Trel.) A.Camus 1935
rhodophlebia f. inclusa Trel. 1924
rhodophlebia f. apus Trel. 1924
Local names
Range Mexico (Durango, Jaliso, Nayarit) ; 2300-2500 m;
Growth habit small shrub less than 3 m tall, to tree 10-15 m;

5-12 cm long x 3-6 wide, deciduous; leathery; obovate or oblong to elliptic-obovate; less than twice as long as wide ; apex obtuse, mucronate; base obtuse to cordate, sometimes oblique; margin thick, plane, sinuate or with 3-8 inconspicuous mucronate teeth; light green or olive green beneath, slightly lustrous, with persistent pubescence made of scattered fasciculate trichomes, especially at the base near the midrib, without glandular hairs; abaxially paler, with fasciculate trichomes and rare yellowish or whitish glandular ones; 9-12 veins pairs, straight or slightly curved; epidermis bullate and papillose; petiole 5-15 mm, persistently pubescent;

Flowers male catkins 4-6 cm long, with numerous flowers;

acorn 10-18 mm long, often sessile, or on a peduncle seldom more than 1 cm long; solitary or to 3; cup half-round with straight rim and pubescent scales, enclosing 1/3 of nut; maturing first year in July;

Bark, twigs and

bark dark grey, fissured with square plates; twigs at first yellowish then becoming darker, 3-4 mm thick, with rather dense and persistent tomentum; lenticels 0.5 cm long; bud ovoid or globose, 3-5 mm long, light brown, with pubescent scales;
Hardiness zone, habitat
Miscellaneous -- A. Camus : n° 185;
-- Sub-genus Quercus, Section Quercus, Series Leucomexicanae;
-- Very close to Q. obtusata, but this one has thinner, glabrescent twigs, larger leaves (to 16 cm long), leaves with glandular trichomes abundant beneath, and longer peduncles (1.5-5.5 mm.)
-- Ressembles also Q. potosina, but this species may have abundant glandular hairs beneath, scattered glandular trichomes adaxially, the blade never longer than 10 cm, and acorn stalks longer (1.,6 to
2.5 cm).

Subspecies and