01691nas a2200217   4500008004100000245009600041210006900137300001400206490000700220520098700227653001201214653003201226653001401258653001101272653002801283100002301311700003801334700002501372700003201397856004401429       2011                        eng d00aThe taxonomic status of the Mexican oak Quercus undata (Fagaceae, Quercus, section Quercus)0 ataxonomic status of the Mexican oak Quercus undata Fagaceae Quer  a1123-11310 v823 a<p>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&rsquo;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.</p>
10aepitype10aintrogressive hybridization10alectotype10aMexico10aSierra Madre Occidental1 aBacon, Jeffrey, R.1 aDávila-Aranda, Patricia, Dolores1 aSpellenberg, Richard1 aGonzález-Elizondo, Socorro  uhttps://quercus.myspecies.info/node/17901839nas a2200169   4500008004100000245011000041210006900151300001200220520123300232653005901465100002001524700001901544700002101563700001801584700002301602856004401625       2015                        eng d00aLeaf phenology mediates provenance differences in herbivore populations on valley oaks in a common garden0 aLeaf phenology mediates provenance differences in herbivore popu  an/a-n/a3 a<p>1. Plants from different populations often display a variation in herbivore resistance. However, it is rarely understood what plant traits mediate such differences. 2. It was tested how leaf phenology affects herbivore populations in a 15-year-old common garden of valley oaks (Quercus lobata N&eacute;e) with different populations and maternal parents from throughout the Q. lobata range. 3. The abundance of leaf miners (Stigmella sp. Shrank) and leaf phenology of oaks in the common garden was measured. 4. Leaf miner abundance varied among provenance locations (population), but not among maternal parents within populations. Leaf phenology varied by provenance location and maternal parent, and trees that leafed out earlier accrued higher leaf-miner abundance. Path analysis indicated that leaf phenology was the likely driver of provenance and parental differences in resistance to leaf miners. 5. Understanding population differences is particularly important when considering transport of genotypes for ornamental or restoration purposes. The present study suggests that similarity in leaf phenology may be one factor that could be used to find genotypes with a similar herbivore resistance to local genotypes.</p>
10aFolivory leaf mine local adaptation provenance Quercus1 aPearse, Ian, S.1 aBaty, Jill, H.1 aHerrmann, Dustin1 aSage, Richard1 aKoenig, Walter, D.  uhttps://quercus.myspecies.info/node/177