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| Euphorbia cyparissias L. | Strid, A. & I. A. Andersson. 1985. Chromosome numbers of Greek mountain plants. An annotated list of 115 species. Bot. Jahrb. Syst. 107: 203–228. | 84-85 | | 40 |
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| Euphorbia cyparissias L. | Schulz-Schaeffer, J. & S. Gerhardt. 1987. Cytotaxonomic analysis of the Euphorbia spp. ("leafy spurge") complex. Biol. Zentralbl. 106: 429–438. | 86-87 | | 36-42 |
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| Euphorbia cyparissias L. | Molero, J. & A. M. Rovira. 1992. Euphorbia L. subsect. Esula (Boiss. in DC.) Pax in the Iberian Peninsula. Leaf surface, chromosome numbers and taxonomic treatment. Collect. Bot. (Barcelona) 21: 121–181. | 92-93 | | 20 |
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| Euphorbia cyparissias L. | Druskovic, B. & M. Lovka. 1995. IOPB chromosome data 9. Int. Organ. Pl. Biosyst. Newslett. (Zurich) 24: 15–19. | 94-95 | | 20 |
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| Euphorbia cyparissias L. | Dobea, C., B. Hahn & W. Morawetz. 1997. Chromosomenzahlen zur Gefässpflanzen-Flora Österreichs. Linzer Biol. Beitr. 29(1): 5–43. | 96-97 | | 40 |
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| Euphorbia cyparissias L. | Wiebecke, W. 2000. In C. Dobea & E. Vitek, Documented Chromosome Number Checklist of Austrian Vascular Plants. Verlag des Naturhistorischen Museums Wien, Vienna. | 98-00 | | 40 |
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| Euphorbia cyparissias L. E. esula L. | Wiebecke, W. 2000. In C. Dobea & E. Vitek, Documented Chromosome Number Checklist of Austrian Vascular Plants. Verlag des Naturhistorischen Museums Wien, Vienna. | 98-00 | | 50 |
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