Abstract
Berlandiera is revised to includeB. subacaulis, B. pumila, B. texana, andB. lyrata with its varietieslyrata andmacrophylla. All species may be induced to interbreed readily, producing F1 progeny which are vigorous but with reduced fertility. Sympatric species produce natural hybrids which are proposed here asB. Xhumilis (=B. pumila XB. subacaulis) andB. Xbetonicifolia (=B. pumila XB. texana). All taxa investigated hadn = 15 chromosomes, including new counts forB. subacaulis and all six F1 hybrids.
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Pinkava, D.J. Biosystematic study of Berlandiera (Compositae). Brittonia 19, 285–298 (1967). https://doi.org/10.2307/2805783
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DOI: https://doi.org/10.2307/2805783