For landscaping in the conditions of sharply con-tinental climate of Siberia cold resistant perennials with early flowering and long vegetation period are of great value. They include species of the genus Pulmonaria L. - lungwort. The aim of this research conducted in 2012-2015 was to determine the pe-culiarities of seasonal development of P. mollis and P. saccharata in the forest-steppe zone of West Siberia (Novosibirsk). The species were forest shade-tolerant mesophytes and had a life form of herbaceous short-rhyzomed polycarpic. Their phenorhythmotypes were identified as spring-summer-autumngreen with spring (P. mollis f. alba), spring and early summer (P. mollis) or early sum-mer (P. saccharata) rhythm of flowering. The early flowering Pulmonaria species were characterized by accelerated development at the beginning of the growing season: the period before budding took 6-12 days and before flowering it was no more than 3 weeks from spring growth. The main phenological dates differed in a small annual variation. Vegeta-tion period came to an end with the establishment of a snow cover. The studied species were promis-ing as early flowering and foliage plants. Ornamen-tal features of lungwort were due to early flowering, long vegetation and also intraspecific polymorphism in inflorescence color (P. mollis) or leaves (P. saccharata). The high decorative effect of composi-tions with lungwort was ensured at cultivation on light shady, slightly matted and moist areas.
lungwort, seasonal development, phenorhythmotype, decorative perennials, introduc-tion, West Siberia
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