Some notes on China aster (Callistephus chinensis (L.) Nees) with particular attention paid to the changeability of florets and inflorescences in view of the so far used descriptions

The paper is mostly devoted to the variability of florets and heads in Callistephus sp.- in its wild form and cultivated varieties. Describing the variability of heads more attention was paid to florets and specially ray florets including rare and often incorrectly described florets with tubular corollas. Attention was called to the necessity of using univocal and generally accepted basic vocabulary for heterogamic heads.