TY - JOUR T1 - ARTIFICIAL AND NATURAL HYBRIDS IN PYCNANTHEMUM (LABIATAE) JF - Brittonia Y1 - 1971 A1 - HL CHAMBERS A1 - KL CHAMBERS SP - 71–{&} VL - 23 UR - http://apps.isiknowledge.com/InboundService.do?product=WOS&action=retrieve&SrcApp=Papers&UT=A1971I872300003&SID=2AFL5dnj5MCc8JPedL5&SrcAuth=mekentosj&mode=FullRecord&customersID=mekentosj&DestFail=http%253A%252F%252Faccess.isiproducts.com%252Fcustom_image ER -