Grasses in Poland: invincible, but threatened
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Biodiv. Res. Conserv. 2010;(19):93–102
The paper presents problems connected with expansiveness and threats to grasses in Poland. Some subjectively selected grass species are discussed. They have conventionally been divided into two opposite groups: (i) expansive or even invasive grasses, referred to here as "invincible", and (ii) grasses that are threatened for a variety of reasons, and deserve protection.