Schemes (A, C) and cross-sections of the achenes (B, D), Takhtajaniantha clade. A, B Scorzonera pusilla (Takhtajaniantha type), B from Aidarova s.n. (FRU) C, D S. pseudodivaricata (Pseudodivaricata type), D from Gubanov 8816 (MW0194378). Designation of the colours: orange (A) – mechanical subepidermal parenchyma; yellow – thin-walled parenchyma; red – sclerenchyma (of parallel orientation); blue – seed coat; violet dots – vestiges of vascular bundles in the seed coat; green – endosperm; central white area – seed hollow.