| Quercus pennivenia | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fagales |
| Family: | Fagaceae |
| Genus: | Quercus |
| Subgenus: | Quercus subg. Quercus |
| Section: | Quercus sect. Lobatae |
| Species: | Q. pennivenia |
| Binomial name | |
| Quercus pennivenia Trel. [1] | |
Quercus pennivenia is a species of oak in the family Fagaceae, native to northern Mexico. [1]
Quercus pennivenia was first described by William Trelease in 1924. [2] It was later synonymized with Quercus urbani , but was restored as an independent species in 2020. It is placed in Quercus sect. Lobatae. [3]
Quercus pennivenia is endemic to Mexico, from northern and southeastern Sinaloa to southwestern Durango. [1]
An oak is a hardwood tree or shrub in the genus Quercus of the beech family. They have spirally arranged leaves, often with lobed edges, and a nut called an acorn, borne in a cup. The genus is widely distributed in the Northern Hemisphere; it includes some 500 species, both deciduous and evergreen. Fossil oaks date back to the Middle Eocene. Molecular phylogeny shows that the genus is divided into Old World and New World clades, but many oak species hybridise freely, making the genus's history difficult to resolve.
The Fagaceae are a family of flowering plants that includes beeches, chestnuts and oaks, and comprises eight genera with about 927 species. Fagaceae in temperate regions are mostly deciduous, whereas in the tropics, many species occur as evergreen trees and shrubs. They are characterized by alternate simple leaves with pinnate venation, unisexual flowers in the form of catkins, and fruit in the form of cup-like (cupule) nuts. Their leaves are often lobed, and both petioles and stipules are generally present. Their fruits lack endosperm and lie in a scaly or spiny husk that may or may not enclose the entire nut, which may consist of one to seven seeds. In the oaks, genus Quercus, the fruit is a non-valved nut called an acorn. The husk of the acorn in most oaks only forms a cup in which the nut sits. Other members of the family have fully enclosed nuts. Fagaceae is one of the most ecologically important woody plant families in the Northern Hemisphere, as oaks form the backbone of temperate forest in North America, Europe, and Asia, and are one of the most significant sources of wildlife food.
Quercus benthamii is a species of oak in the family Fagaceae. It is native to the cloud forests of Central America and southern Mexico. It is threatened by habitat loss.
Quercus coahuilensis is a species of plant in the family Fagaceae. It is endemic to the Mexican state of Coahuila. It is placed in section Lobatae.
Quercus depressipes is a species of plant in the family Fagaceae. It is found in North America, primarily Mexico and the United States.
Quercus vicentensis is a species of oak tree in the family Fagaceae, native to southern Mexico and northern Central America. It is placed in section Quercus.
Quercus delgadoana is an endangered species of oak in the family Fagaceae, found in eastern Mexico. It was originally misidentified as other members of the genus Quercus, but was determined as a new species in 2011.
Quercus confertifolia, synonym Quercus gentryi, is a species of flowering plant in the family Fagaceae, native to northern and southwestern Mexico.
Quercus porphyrogenita is a species of oak in the family Fagaceae, native to northeastern Mexico.
Quercus grahamii is a species of oak tree in the family Fagaceae, native to Mexico, central, southwestern and the gulf state of Veracruz. It was first described by George Bentham in 1840. It is placed in Quercus section Lobatae.
Quercus acutifolia, many synonyms including Quercus conspersa, is a species of oak tree. It is native to central and southern Mexico and northern Central America, from Nayarit south as far as Belize and Guatemala.
Quercus × dysophylla is a species of oak tree. It grows in central Mexico in Hidalgo, México State, D.F., Puebla, Michoacán, and San Luis Potosí. Its parents are Q. crassifolia and Q. crassipes, both members of section Lobatae.
Quercus urbani, also known as Quercus urbanii, is a species of oak. It is native to western and central Mexico from Sinaloa, Durango, and Zacatecas to Oaxaca. It was previously synonymized with Quercus pennivenia, but this was restored as an independent species in 2020.
Quercus potosina is a species of oak. It is native to northern Mexico, from Chihuahua, Durango, and Jalisco east as far as San Luis Potosí. It is placed in Quercus section Quercus.
Quercus coffeicolor is a species of oak. It is native to Nayarit, Sinaloa, and Jalisco in western Mexico.
Quercus eduardi is a species of oak tree. Q. eduardi is found in Sierra Fría, Aguascalientes, Mexico, between 2,200 and 2,600 metres above sea level. It is placed in Quercus section Lobatae.
Quercus jonesii is a species of oak tree native to Mexico. It is commonly known as palo manzano. It is placed in Quercus section Lobatae.
Quercus crispipilis is a species of oak native to Chiapas state in southern Mexico and to Guatemala.
Quercus saltillensis is a species of oak. It is native to northeastern Mexico. It is placed in Quercus section Lobatae.
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