A Cytological Study of Two Putative Skimmia Hybrids (Rutaceae)

Summary. Cultivars of the putative hybrid Skimmia japonica Thunb. subsp. japonica x subsp. reevesiana (Fortune) N. P. Taylor & Airy Shaw have 2n = 30, regular meiosis (15 bivalents) and are highly fertile; they are best assigned to S.japonica subsp.japonica. It is doubtful whether this hybrid has ever been in cultivation. S. x confusa N. P. Taylor (S.japonica x anquetilia N. P. Taylor & Airy Shaw) has 2n = 30 and forms 15 bivalents at metaphase I; it is, however, largely sterile.