Subsections, clades, and complexes for sect. Lobatae and sect. Quercus in North America

A great paper on the taxonomy of sect. Lobatae and sect. Quercus is "An Updated Infrageneric Classification of the North American Oaks (Quercus Subgenus Quercus): Review of the Contribution of Phylogenomic Data to Biogeography and Species Diversity". It provides good descriptions and evidence for multiple clades that help simplify the taxonomy of Quercus species. Here I'll outline the basic taxonomic structure the paper provides

Sect. Lobatae

Subsect. Agrifoliae: Q. agrifolia, Q. kelloggii, Q. parvula, Q. wislizeni
"Subevergreen complex" (Q. agrifolia complex): Q. agrifolia, Q. parvula, Q. wislizeni

Subsect. Palustres: Q. palustris, Q. texana

Subsect. Coccineae: Q. acerifolia, Q. buckleyi, Q. coccinea, Q. ellipsoidalis, Q. rubra, Q. shumardii, Q.
velutina
Q. shumardii complex: Q. acerifolia, Q. buckleyi, Q. shumardii, Q. rubra
Q. coccinea complex*: Q. velutina, Q. coccinea, Q. ellipsoidalis

Subsect. Phellos: Q. arkansana, Q. elliottii, Q. falcata, Q. georgiana, Q. hemispherica, Q. ilicifolia, Q.
imbricaria, Q. incana Q. inopina, Q. laevis, Q. laurifolia, Q. marilandica, Q. myrtifolia, Q. nigra, Q.
pagoda, Q. phellos
Q. incana complex*: Q. hemisphaerica, Q. incana, Q. myrtifolia, Q. inopina
Q. ilicifolia complex*: Q. ilicifolia Q. georgiana Q. imbricaria
Q. phellos complex*: Q. pumila, Q. pagoda, Q. phellos, Q. laurifolia, Q. nigra, Q. arkansana
Q. marilandica complex*: Q. laevis, Q. marilandica, Q. falcata

Sect. Quercus

Subsect. Dumosae: Q. berberidifolia, Q. cornelius-mulleri, Q. douglasii, Q. dumosa, Q. durata, Q.
gambelii, Q. garryana, Q. john-tuckeri, Q. lobata, Q. pacifica
Grade (not monophyletic): Q. gambelii, Q. garryana, Q. lobata
Q. berberidifolia—Q. durata complex (Q. berberidifolia complex for INat): Q. berberidifolia, Q. durata
Q. dumosa complex*: Q. pacifica, Q. dumosa, Q. cornelius-mulleri, Q. john-tuckeri, Q. douglasii
Subclade: Q. cornelius-mulleri, Q. john-tuckeri, Q. douglasii (would not be included in INat taxonomy)

Subsect. Prinoideae: Q. bicolor, Q. lyrata, Q. macrocarpa, Q. muehlenbergii, Q. prinoides
Q. prinoides complex*: Q. muehlenbergii, Q. prinoides
Q. lyrata complex*: Q. bicolor, Q. lyrata, Q. macrocarpa

Subsect. Albae: Q. alba, Q. michauxii, Q. montana

Subsect. Stellatae: Q. austrina, Q. boyntonii, Q. chapmanii, Q. havardii, Q. margettae, Q. oglethorpensis,
Q. similis, Q. sinuata, Q. stellata
Q. austrina complex* (which species was named first is unclear) : Q. austrina, Q. margarettae
Q. chapmanii complex*: Q. chapmanii, Q. havardii
Q. stellata complex*: Q. stellata, Q. similis, Q. boyntonii

Subsect. Polymorphae: Q. hinckleyi, Q. laceyi, Q. mohriana, Q. polymorpha, Q. pungens, Q. vaseyana
Q. vaseyana complex*: Q. hinckleyi, Q. pungens, Q. vaseyana

*Not specifically named in the paper but given a name based off of the most senior specific epithet in the group

Manos PS, Hipp AL. An Updated Infrageneric Classification of the North American Oaks (Quercus Subgenus Quercus): Review of the Contribution of Phylogenomic Data to Biogeography and Species Diversity. Forests. 2021; 12(6):786. https://doi.org/10.3390/f12060786

Posted on March 28, 2024 06:59 AM by leytonjfreid