Quercus paxtalensis C.H. Mull.

Mexico (Chiapas, Hidalgo, Oaxaca, Tamaulipas, Veracruz); 1000-1800 m

7-20 m tall ;

8-16 x 2.8-5 cm; subcoriaceous; lanceolate to narrowly elliptic, sometimes oblong, often asymmetrical at base; apex acute to acuminate, bristle-tipped; base cuneate or truncate; margin flat, with 7-11 pairs of aristate teeth; adaxially lustrous, hairless; abaxially less lustrous, glabrous or seldom with stipitate, fascicled trichomes at veins axils; 9-13 veins pairs, straight, ending in the teeth, weakly raised or not at all above, prominent beneath; epidermis slightly papillose or smooth; petiole 2-4 cm, glabrous;

acorn 1.2-1.7 cm long, 1-1.2 wide, ovoid-cylindrical; solitary or paired; on a 4-5 mm long peduncle; cupule turbinate 12-17 mm in diameter, 10-12 mm high, with greyish pubescent scales; enclosed at 1/3 in the cup; maturing in 1 year in August to October.

– A. Camus : n° 399; – Sub-genus Quercus, section Lobatae, Series Erythromexicanae, Group Acutifoliae; – For some Mexican Authors (Silvia Romero Rangel, 2006), as well for Govaerts 2013, this species is a synonym of Q.xalapensis . But for S. Valencia 2016 it is a true species which differs from Q. xalapensis which has acorns maturing in 2 years, a tawny cupule more tomentose, and foliar base rounded or obtuse ; – Possible confusion with Q. sartorii which has leaves only slightly shiny obove, and the teeth located in the distal half or 2/3 of the blade. – Differs from Q. meavei which has acorns maturing in 2 years, more secondary veins (13-18) impressed above.