Quercus × morehus,Carl B. Wolf, “California Plant Notes I, x Quercus morehus,” Occasional Papers, Rancho Santa Ana Botanic Garden of the Native Plants of California, Volume 1 (Number 1): pages 47-52 (1938) Abram's oak in Kellogg's original descriptionAlbert Kellogg, "On a new species of Oak, brought from Clear Lake by Mr. A. A. Veatch," Proceedings of the California Academy of Sciences, series 1, volume 2: page 36 (1863) (later called oracle oak by JepsonWillis Linn Jepson, A Manual of the Flowering Plants of California, p. 277 (genus Quercus and some other parts 1923, the rest 1925)), is a named hybrid between the red oaks Quercus kelloggii (California black oak) and Quercus wislizeni (interior live oak).Online link to The Jepson Manual eFlora = http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=40652 accessed 1 October 2015 Originally published as the unique species Quercus morehus by Kellogg rather than as the hybrid it is called today this tree is found in the US states of California and possibly southern Oregon,Online link to Consortium of Pacific Northwest Herbaria (specimens #1, #4-17, #19-30, #32-34) = http://www.pnwherbaria.org/data/results.php?DisplayAs=WebPage&ExcludeCultivated=Y&GroupBy=ungrouped&SortBy=Year&SortOrder=DESC&SearchAllHerbaria=Y&QueryCount=1&Family1=fagaceae&IncludeSynonyms1=Y&Genus1=quercus&Species1=morehus&Zoom=4&Lat=55&Lng=-135&PolygonCount=0 accessed 1 October 2015 usually where the territories of the purported parents overlap.
Because the name Q. × morehus was adopted before 1980, while Q. wislizeni and Quercus parvula were still considered conspecificKevin C. Nixon and Cornelius H. Muller, “New Names in California Oaks,” Novon, volume 4: pages 391-393 (1994) it is often applied not only to trees appearing intermediate in form between Q. kelloggii and Q. wislizeni but also to those that could be Q. kelloggii × Q. parvula. Pending formal description, the name Q. × ‘wootteni’ (Wootten's oak) has been proposed for the California black oak (Q. kelloggii) × Shreve oak (Q. parvula var. shrevei) hybrid.Duncan A. Hauser, Al Keuter, John D. McVay, Andrew L. Hipp, and Paul S. Manos, The evolution and diversification of the red oaks of the California Floristic Province (Quercus section Lobatae, series Agrifoliae), American Journal of Botany, October 2017 104:1581-1595
Quercus × morehus is a hybrid between a deciduous oak and an evergreen oak. Leaves are generally deciduous or partially deciduous and intermediate in form between Q. kelloggii and Q. wislizeni.
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