RT Journal Article SR Electronic T1 Checklists of Cultivars of Linden (Tilia) Species JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 157 OP 164 DO 10.48044/jauf.1985.036 VO 11 IS 5 A1 Frank S. Santamour, Jr. A1 Alice Jacot McArdle YR 1985 UL http://auf.isa-arbor.com/content/11/5/157.abstract AB The difficulties of taxonomy in Tilia are many and varied. Cultivars of Tilia are described and discussed under the European species T. cordata, T. platyphyllos, and T. tomen-tosa, as well as the only United States species recognized, T. americana. The hybrids T. X europaea (T. cordata X T. platyphyllos) and T. X flavescens (T. americana X T. cordata) are also recognized as having valid cultivars. Several cultivars of doubtful hybrid origin are listed under the species they most resemble while some are grouped under “other hybrids.”