Bartram Shadbush vs Chisos Mountains Oak

Amelanchier bartramiana compared with Quercus tardifolia

Key Differences

• Bartram Shadbush is Least Concern while Chisos Mountains Oak is Data Deficient.

Taxonomic Classification

Rank	Bartram Shadbush	Chisos Mountains Oak
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Rosales (Roses & Allies)	Fagales (Beeches & Oaks)
Family	Rosaceae (Rose Family)	Fagaceae (Beech Family)
Genus	Amelanchier	Quercus (Oaks)
Species	Amelanchier bartramiana	Quercus tardifolia

Evolutionary Relationship

Bartram Shadbush and Chisos Mountains Oak share a common ancestor at the Class level: Magnoliopsida. (Dicots)

Conservation Status

Bartram Shadbush

LC — Least Concern

Chisos Mountains Oak

DD — Data Deficient

Physical Characteristics

Attribute	Bartram Shadbush	Chisos Mountains Oak
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bartram Shadbush

Habitat

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

Range

Distributed across Canada, France, and United States.

Chisos Mountains Oak

Habitat

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

Bartram Shadbush

The Bartram Shadbush (Amelanchier bartramiana) is a species in the genus Amelanchier. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Chisos Mountains Oak

The Chisos Mountains Oak (Quercus tardifolia) is a rare deciduous oak endemic to the Chisos Mountains of Big Bend National Park in Trans-Pecos Texas, USA. Belonging to the red oak group (section Lobatae) within the family Fagaceae, it is one of the most geographically restricted oaks in North America, known from only a very small area within the high-elevation woodland zones of the park. The species grows at elevations roughly between 1,800 and 2,400 metres, where it occurs in mixed woodland communities alongside other oaks, junipers, and pines. Like other red oaks, its acorns require two years to mature, and the leaves typically display the deep sinuses and bristle-tipped lobes characteristic of the section. The IUCN currently classifies Quercus tardifolia as Data Deficient, reflecting uncertainty about its precise population size, the extent of hybridisation with related oak species, and the degree to which apparent stands represent genetically distinct individuals versus hybrids. Climate change poses a significant long-term threat to this mountain-island endemic, as rising temperatures could compress or eliminate the cooler, moister habitat on which it depends. Conservation efforts focus on accurate taxonomic assessment, population monitoring within Big Bend National Park, and seed banking to preserve genetic diversity.