Table 1.

Taxonomic concept of Platanus adopted for the present study and geographical ranges of species and varieties (from Nixon and Poole, 2003)

Taxon (Nixon and Poole, 2003)	Variety	Distribution	Notes*
Platanus kerrii Gagnep.†		Vietnam
P. orientalis L.		South-eastern Europe, south-western Asia
P. racemosa Nutt.	var. racemosa	California, Baja California	1
P. racemosa Nutt.	var. wrightii (S.Wats.) Benson	Arizona, New Mexico, Chihuaha	1
P. gentryi Nixon & Poole		Sonora, Sinaloa, Chihuaha	1
P. occidentalis L.	var. occidentalis	Eastern Canada, eastern USA	2
P. occidentalis	var. palmeri (Kuntze) Nixon & Poole ex Geerinck	Texas, Coahuila	2
P. rzedowskii Nixon & Poole		Nuevo Leon, Tamaulipas	2
P. mexicana Moric.	var. mexicana	Veracruz, Puebla, Oaxaca, Chiapas	3
P. mexicana Moric.	var. interior Nixon & Poole	San Luis Potosi, Queretaro	3

* Notes: 1, P. racemosa species aggregate; 2, P. occidentalis species aggregate; 3, P. mexicana s.l.

^† Subgenus Castaneophyllum; all the remaining species belong to subgenus Platanus.