Abstract
Plants whose morphological characteristics correspond to those of Orobanche filicicola Nakai ex Hyun, Lim et Shin as described by Nakai (1952) and validated by Huyn et al. (2003), were in 2012 found for the first time in Russia (Far East, Primorye Territory) growing on the banks of the Ussuri River in the Chuguyevsky District and in a mixed population with O. amurensis (Beck) Kom. on the SE flank of the Sikhote-Alin Mountains (Lazovsky District). The status of the taxon has been revised. As a result, it is reclassified as a new variety of O. pycnostachya Hance, namely as O. pycnostachya var. filicicola (Nakai ex Hyun, Lim et Shin) Rätzel et Uhlich. In this context, O. pycnostachya and O. amurensis are discussed, including the relationship of O. amurensis with O. pycnostachya. In addition, O. coerulescens Stephan, O. coerulescens f. cristata Beck, O. coerulescens f. lehmannii Beck, O. coerulescens f. pekinensis Beck, O. coerulescens var. arenaria Serg., O. macrolepis Turcz., O. pycnostachya, O. pycnostachya f. amurensis Beck, O. pycnostachya f. albo-lutea Beck, O. quadrivalvis Regel and O. ussuriensis Novopokr. are lectotypified. Three necessary new combinations of infraspecific taxa from O. coerulescens — O. coerulescens var. nipponica (Makino) Uhlich et Rätzel, O. coerulescens var. occidentalis f. multidentata (Beck) Uhlich et Rätzel and O. coerulescens f. arenaria (Serg.) Uhlich et Rätzel — are made. The name O. quadrivalvis is to be used as a synonym of O. kotschyi Reut.
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