Great Basin Naturalist


Reviewed are the oak taxa as they are presently understood in Utah. Keys and descriptions are included, occurrences are cited, and problems of hybridization are discussed. Named as new varieties from Utah are Quercus gambelii Nutt. var. bonina Welsh and Quercus havardii Rydb. var. tuckeri Welsh. Both varieties occur in southeastern Utah. Quercus eastwoodiae Rydb. is proposed as a hybrid.