Quercus eduardi Trel.

Mexico (Aguascalientes, Chihuahua, Durango, Guanajuato, Hidalgo, Jalisco, Michoacán, Nayarit, Querétaro, San Luis Potosí, Tamaulipas, Veracruz, Zacatecas); 1500-2700 m;

5-9 m or shrub 2-6 m tall;

3-6 cm long, 1-3 wide; deciduous; leathery, not rough; oblong or elliptic-oboval, sometimes oblong-lanceolate; apex aristate, acute or rounded, seldom obtuse; base cordate sometimes rounded; margins slightly revolute or flat, rarely entire or more often with 2-5 pairs of aristate teeth in the distal half; dark lustrous green above, glabrescent or with some stellate, sessile trichomes persistent near base; abaxial surface not so lustrous, paler, with dense whitish pubescence made of fasciculate, sessile, spiraly twirled, tangled hairs and axillary tufts; 4-8 vein pairs, mostly straight, flat above; epidermis flat; petiole 4-8 mm, pinkish, minutely tomentose, glabrescent;

June-July; male catkins 2-3 cm, with densely hairy rachis bearing more than 20 flowers; 1 or 2 pubescent female flowers on 0.5-1 axis;

very small, ovoid acorn, 8-10 mm long, sessile or nearly so (peduncle 2-5 mm long); paired or to 3; enclosed 1/2 by cup; cup halfround 1 cm in diameter, with thin, slightly tomentose and appressed scales; long stylopodium ; maturing in 1 year in August to November;

– Sub-genus Quercus, section Lobatae, Series Erythromexicanae; – Related to Q.emoryi that has the apical lobe larger; – Differs from Q. durifolia which has the leaf margin entire, only fasciculate hairs abaxially, hairs with undulate rays. – Resembles Q. affinis but the lower side of the leaf of this species has some hairs only at the vein axils. – Q. eduardi has fasciculate contorted hairs abaxially, like Q. mexicana, but the latter has elliptic, lanceolate to oblong leaves, entire and slightly revolute foliar margins, 7-12 vein pairs, a bullate and papillose epidermis.. – Named after Edward Palmer, 1831-1911, who collected it near Durango in 1896; the latinization form of “Edward” being “Eduardus”, the termination with a single “i” is correct.