The two varieties differ in habit, habitat, leaf size and lobing, and geographic range, and considerable variability exists within both varities as to the degree and density of silvery stellate-pubescence on the abaxial surface of the leaf. Sun leaves of both tend to have a higher proportion of silvery pubescence, and shade leaves and some individual trees tend to have more glabrate leaves, although evidence of flat-stellate trichomes is usually apparent. Plants with young, expanding leaves sometimes are mistaken for Quercus nigra , a member of the red oak group.
Quercus sinuata is a species of oak comprising two distinct varieties, Quercus sinuata var. breviloba and Quercus sinuata var. sinuata, occurring in southeast North America.
Quercus sinuata is a deciduous tree up to 20 metres (67 feet) tall. Leaves are narrow, with shallow rounded lobes. It tends to grow in wet habitats, such as on river bluffs, river bottoms, and flatwoods, and generally over basic substrates, such as mafic rocks, shells, or calcareous sediment.[3][4]
There are two varieties, with morphologically intermediate forms sometimes occurring where their ranges overlap:[2][3]
Perhaps arising from the classification challenges posed by a lack of morphological consistency among individuals of the species, the common name bastard oak[5] may refer to either var. sinuata or var. breviloba or to any of their intermediate forms. The common names Durand oak[3] and Durand white oak most often refer to Quercus sinuata var. sinuata.[6] Other common names for Quercus sinuata var. sinuata include bastard white oak and bluff oak, but these names more often refer to Quercus austrina.[7] Common names for Quercus sinuata var. breviloba are Bigelow oak, Bigelow's oak, shallow-lobed oak, white shin oak, scaly-bark oak, limestone Durand oak, and shortlobe oak. Other common names include scrub oak or shin oak, but these names may refer to a number of other low growing, clump forming oak species, subspecies or varieties. For clear differentiation in common reference, American Forests uses Durand Oak to mean Quercus sinuata var. sinuata and Bigelow oak to mean Quercus sinuata var. breviloba, a shrubby variety of Quercus sinuata distinguished in part by its habit of forming clonal colonies in parts of its range.
Quercus sinuata var. breviloba is native to central and north central Texas, south central and southwest Oklahoma, and to Coahuila, Nuevo León, and Tamaulipas in northern Mexico. Quercus sinuata var. sinuata is native to the south-central and southeastern United States from central Texas and southwestern Arkansas to the Carolinas.[3][8] Their respective ranges intersect in the Hill Country of central Texas, where streams flowing through dry, brushy limestone hills create a mosaic of wet and well drained habitats.[3]
Quercus sinuata is a species of oak comprising two distinct varieties, Quercus sinuata var. breviloba and Quercus sinuata var. sinuata, occurring in southeast North America.
Multimedia w Wikimedia Commons Quercus sinuata Walter – gatunek rośliny z rodziny bukowatych (Fagaceae Dumort.). Występuje naturalnie w Meksyku (w stanach Coahuila, Nuevo León i Tamaulipas) oraz południowych i południowo-wschodnich Stanach Zjednoczonych (w Oklahomie, Teksasie, Alabamie, Arkansas, na Florydzie, w Georgii, Luizjanie, Missisipi, Południowej Karolinie i Północnej Karolinie)[3][4].
Rośnie w widnych lasach, suchych zaroślach, na łąkach oraz brzegach rzek. Występuje na wysokości do 600 m n.p.m.[4]
W obrębie tego gatunku wyróżniono jedną odmianę[2]:
Quercus sinuata Walter – gatunek rośliny z rodziny bukowatych (Fagaceae Dumort.). Występuje naturalnie w Meksyku (w stanach Coahuila, Nuevo León i Tamaulipas) oraz południowych i południowo-wschodnich Stanach Zjednoczonych (w Oklahomie, Teksasie, Alabamie, Arkansas, na Florydzie, w Georgii, Luizjanie, Missisipi, Południowej Karolinie i Północnej Karolinie).
Quercus sinuata là một loài thực vật có hoa trong họ Cử. Loài này được Walter miêu tả khoa học đầu tiên năm 1788.[1]
Quercus sinuata là một loài thực vật có hoa trong họ Cử. Loài này được Walter miêu tả khoa học đầu tiên năm 1788.
