Quercus greggii
Quercus greggii, the Mexican oak, is a monoecious, semi-evergreen oak adapted to dry environments. It is native to Mexico and typically grows at high elevations, around 2,000–3,300 meters (6,600–10,800 feet), in the Sierra Madre Oriental and Sierra Madre de Oaxaca regions.
The tree usually reaches about 6.1–7.6 meters (20–25 feet) in height, but can be smaller (as little as 1.8 meters or 6 feet). It is about 3–4.6 meters (10–15 feet) wide. The leaves are waxy, rounded-oval, about 3–6 by 2–4 centimeters, and are densely covered in tiny hairs. The bark is light gray and scales with small lenticels, and the twigs are woolly.
In April, the tree produces catkins roughly 3–4.5 centimeters long. Because the plant is monoecious, it has both male and female flowers on the same tree; the female inflorescences carry 2–4 hairy flowers. The acorns can appear alone or in small clusters on short stalks.
La Siberica is a cultivar of this species.
Taxonomy: Binomial name Quercus greggii (A.DC.) Trelease. It belongs to the family Fagaceae, genus Quercus, subgenus Quercus, and section Quercus.
Synonyms include Quercus derrumbaderoensis, Quercus greggii f. subglabra, Quercus loeseneri, Quercus reticulata var. greggii, Quercus reticulata f. pungens, and Quercus revoluta f. pungens, among others.
This page was last edited on 1 February 2026, at 17:48 (CET).