| Digitalis purpurea L. | Freeman, C. C. & R. E. Brooks. 1988. Documented plant chromosome numbers 1988: 1. Chromosome counts for North American plants -- I. Sida 13: 241–250. | 88-89 | 28 | |
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| Digitalis purpurea L. | Chandran, R. & K. V. Bhavanandan. 1987. Cytological investigation of the family Scrophulariaceae II. Coenocytism in Digitalis purpurea Linn. Cytologia 52: 81–84. | 86-87 | 28 (irr.) | |
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| Digitalis purpurea L. | Subramanian, D. & R. Pondmudi. 1987. Cytotaxonomical studies of south Indian Scrophulariaceae. Cytologia 52: 529–541. | 86-87 | 24 | 48 |
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| Digitalis purpurea L. | Probatova, N. S. & A. P. Sokolovskaya. 1989. Chromosome numbers in vascular plants from Primorye Territory, the Amur region, Sakhalin, Kamchatka and the Kuril Islands. Bot. Zhurn. (Moscow & Leningrad) 74: 120–123. | 88-89 | | 48 |
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| Digitalis purpurea L. | Wentworth, J. E., J. P. Bailey & R. J. Gornall. 1991. Contributions to a cytological catalogue of the British and Irish flora, 1. Watsonia 18: 415–417. | 90-91 | | 56 |
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| Digitalis purpurea L. | Chatterjee, A., S. Ghosh & S. C. Roy. 1989. A cytological survey of eastern Himalayan plants III. Cell Chromosome Res. 12: 22–29. | 90-91 | 28 | |
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| Digitalis purpurea L. | Hollingsworth, P. M., R. J. Gornall & J. P. Bailey. 1992. Contribution to a cytological catalogue of the British and Irish flora, 2. Watsonia 19: 134–137. | 92-93 | | 56 |
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| Digitalis purpurea L. | Murín, A. 1997. Karyotaxonomy of some medicinal and aromatic plants. Thaiszia 7: 75–88. | 94-95 | | 56 |
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| Digitalis purpurea L. | Mĕsíček, J. 1992. In J. M|3esí|3ccek & V. Jav@0urková-Jarolímová, List of Chromosome Numbers of the Czech Vascular Plants. Academia, Praha. | 96-97 | | 56 |
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| Digitalis purpurea L. | Albers, F. & W. Pröbsting. 1998. In R. Wisskirchen & H. Haeupler, Standardliste der Farn- und Blütenpflanzen Deutschlands. Bundesamt für Naturschutz & Verlag Eugen Ulmer, Stuttgart. | 98-00 | | 56 |
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| Digitalis purpurea L. | Bacchetta, G. 2001. Números cromosomáticos de plantas occidentales, 863--879. Anales Jard. Bot. Madrid 58(2): 341–342. | 01-03 | | 56 |
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