@article {181, title = {Quercus delgadoana (Fagaceae), a New Species from the Sierra Madre Oriental, Mexico}, journal = {Novon: A Journal for Botanical Nomenclature}, volume = {21}, year = {2011}, pages = {274{\textendash}277}, abstract = {

.\  Quercus delgadoana S. Valencia, Nixon \& L. M. Kelly (Fagaceae), a new species from the states of Hidalgo, Puebla, and Veracruz in the Sierra Madre Oriental, Mexico, is described and illustrated. We discuss its morphological similarity to Q. eugeniifolia Liebm., Q. sapotifolia Liebm., Q. salicifolia N\ée, Q. laurina Bonpl., and Q. affinis Scheidw., with which it shares narrowly lanceolate leaves and fasciculate stipitate trichomes in the axils of the secondary veins on the underside of the lamina. A dichotomous key is provided to distinguish these species.

}, issn = {1055-3177}, doi = {10.3417/2009054}, url = {http://www.bioone.org.proxy.uchicago.edu/doi/10.3417/2009054}, author = {Valencia Avalos, Susana and Nixon, Kevin C and Kelly, Lawrence M} } @article {179, title = {The taxonomic status of the Mexican oak Quercus undata (Fagaceae, Quercus, section Quercus)}, journal = {Revisita Mexicana de Biodiversidad}, volume = {82}, year = {2011}, pages = {1123-1131}, abstract = {

Quercus undata Trel. (Fagaceae, Quercus, Section Quercus) has a complex taxonomic and nomenclatural history. Intensive sampling of oaks at the type locality of Q. undata Trel. in Durango, Mexico and evaluation of herbarium specimens and plants in the field indicate that Q. undata represents variation in Quercus chihuahuensis Trel. in white oak communities where introgressive hybridization among Q. chihuahuensis, Q. grisea Liebm., and a third white oak, Q. arizonica Sarg. made species identification difficult. Endlich\’s type specimen of Q. undata, as designated by Trelease, was apparently destroyed in bombing raids on Berlin during World War II, and we propose herein as lectotype the Trelease illustration of the type. An epitype is also designated in support of the lectotype, given that some features cannot be critically observed on the illustration. The long peduncles of the specimen illustrated by Trelease indicate a close relation to Q. chihuahuensis.

}, keywords = {epitype, introgressive hybridization, lectotype, Mexico, Sierra Madre Occidental}, author = {Bacon, Jeffrey R. and D{\'a}vila-Aranda, Patricia Dolores and Spellenberg, Richard and Gonz{\'a}lez-Elizondo, M. Socorro} } @article {134, title = {Cytogenetic studies on Quercus L. (Fagaceae) species belonging to Ilex and Cerris section in Turkey}, journal = {CaryologiaCaryologia}, volume = {64}, number = {3}, year = {2011}, pages = {297-301}, abstract = {A detailed karyotype analyses of the five species of Quercus L. (Q. coccifera L., Q. ilex L., Q. aucheriJaub. \& Spach, Q. cerris L. and Q. ithaburensis Decne subsp. macrolepsis (Kotschy) Hedge \& Yalt.) belonging toIlex and Cerris section were examined. The somatic chromosome number of all studied taxa 2n = 24 was found.The karyotypes of investigated species showed the great similarity with the chromosome length and the positionof centromere. Chromosome number and detailed karyotype of these species were first time counted from Turkey.}, keywords = {cerris, ilex, Karyotype analyses, Quercus, Turkey}, author = {Yilmaz Aykut and Emel Uslu and M. Tekin Baba{\c c}} }