Chisos Red Oak vs Common Oak

Quercus gravesii compared with Quercus robur

Taxonomic Classification

Rank	Chisos Red Oak	Common Oak
Kingdom same	Plantae (植物)	Plantae (植物)
Phylum same	Magnoliophyta (被子植物門)	Magnoliophyta (被子植物門)
Class same	Magnoliopsida (モクレン綱)	Magnoliopsida (モクレン綱)
Order same	Fagales (ブナ目)	Fagales (ブナ目)
Family same	Fagaceae (Beech Family)	Fagaceae (Beech Family)
Genus same	Quercus (Oaks)	Quercus (Oaks)
Species	Quercus gravesii	Quercus robur

Evolutionary Relationship

Chisos Red Oak and Common Oak share a common ancestor at the Genus level: Quercus. (Oaks)

Conservation Status

Chisos Red Oak

LC — Least Concern

Common Oak

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	Chisos Red Oak	Common Oak
Diet	—	Autotroph
Average Lifespan	—	1000 years
Average Length	—	25.0 m
Average Weight	—	—

Habitat & Geographic Range

Chisos Red Oak

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Common Oak

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Widely distributed across Africa (Lesotho, South Africa), Asia (Armenia, India), Europe (8 countries), North America (Canada, United States), Oceania and the Pacific (Australia, New Zealand), and South America (4 countries).

Chisos Red Oak

The Chisos Red Oak (Quercus gravesii) is a medium-sized deciduous oak native to the mountain ranges of the Trans-Pecos region of Texas and extending into adjacent areas of northeastern Mexico, including the Sierra Madre Oriental foothills. It belongs to the red oak group (section Lobatae) within the family Fagaceae, characterised by leaves with lobes ending in bristle tips and acorns that take two seasons to ripen. Quercus gravesii typically grows on rocky slopes and canyon walls at mid to high elevations, forming part of diverse Madrean woodland and pinyon-juniper communities alongside other oaks, junipers, and conifers. Its foliage turns red and orange in autumn, providing a striking display in the typically muted desert mountain landscape. The species is an important component of its ecosystem, providing food and habitat for numerous birds and mammals; acorns are consumed by jays, woodpeckers, deer, and small rodents. Hypnotic hybridisation with related oak species is documented in areas of sympatry. The IUCN classifies Chisos Red Oak as Least Concern, with populations considered stable across its range. It is well represented within protected areas including Big Bend National Park and the Davis Mountains. Threats are limited but include drought stress exacerbated by climate change and browsing pressure from white-tailed deer.

Common Oak

ヨーロッパで最も重要かつ広く分布する落葉樹の一つであるイングリッシュオーク（Quercus robur）は、1,000年以上生き、高さ40mに達し、ヨーロッパのどの樹種よりも多くの生物多様性を支える。2,300種以上の昆虫・菌類・地衣類・苔・鳥類が成熟したナラに直接依存している。ヨーロッパ全域から西アジアにかけての温帯林に分布し、その硬くて耐久性のある木材は歴史的に造船・建築・樽製造に欠かせなかった。