Heterotheca villosa (Pursh) Shinners | Powell, A. M. & S. A. Powell. 1978. Chromosome Numbers in Asteraceae. Madroño 25(3): 160–169. | 75-78 | 18 | |
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Heterotheca villosa (Pursh) Shinners | Love, A. & H. E. Connor. 1982. Relationships and taxonomy of New Zealand wheat grasses. New Zealand J. Bot. 20: 169–186. | 82-83 | | 36 |
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Heterotheca villosa (Pursh) Shinners | Chinnappa, C. C. & J. G. Chmielewski. 1987. Documented plant chromosome numbers 1987: 1. Miscellaneous counts from western North America. Sida 12: 409–417. | 86-87 | | 18 |
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Heterotheca villosa (Pursh) Shinners | Carr, G. D., R. M. King, A. M. Powell & H. E. Robinson. 1999. Chromosome numbers in Compositae. XVIII. Amer. J. Bot. 86(7): 1003–1013. | 98-00 | 18II | |
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Heterotheca villosa (Pursh) Shinners | Semple, J. C. 1977. Cytotaxonomy of Chrysopsis and Heterotheca (Compositae Astereae): A new interpretation of phylogeny. Canad. J. Bot. 55: 2503–2513. | 75-78 | 18 | |
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Heterotheca villosa (Pursh) Shinners | Hartman, R. L. 1977. In IOPB chromosome number reports LVI. Taxon 26: 257–274. | 75-78 | 18 | |
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Heterotheca villosa (Pursh) Shinners | Keil, D. J. & T. F. Stuessy. 1977. Chromosome counts of Compositae from Mexico and the United States. Amer. J. Bot. 64: 791–798. | 75-78 | 9,18 | |
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Heterotheca villosa (Pursh) Shinners x fulcrata (Greene) Shinn. | Keil, D. J., M. A. Luckow & D. J. Pinkava. 1988. Chromosome studies in Asteraceae from the United States, Mexico, the West Indies, and South America. Amer. J. Bot. 75: 652–668. | 88-89 | 9III | |
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