| Cephalanthera longifolia (L.) Fritsch | Averyanov, L. V., N. A. Medvedeva & V. P. Serov. 1985. Chromosome numbers in the representatives of the family Orchidaceae from the Caucasus. Bot. Zhurn. SSSR 70(7): 999–1000. (In Russian). | 84-85 | | 32 |
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| Cephalanthera longifolia (L.) Fritsch | VIJ, S. P. & R. Sood. 1986. Cytology in relation to morphology in Spiranthes lancea (Sw.) Backer. Pp. 147--161. In S.P. Vij (editor), Biology, Conservation, and Culture of Orchids. New Delhi, for Orchid Society of India, Affiliated East–West Press. | 86-87 | | 34 |
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| Cephalanthera longifolia (L.) Fritsch | Schwarzacher, T. & D. Schweizer. 1982. Karyotype analysis and heterochromatin differentiation with Giemsa C-Banding and fluorescent counterstaining in Cephalanthera (Orchidaceae). Pl. Syst. Evol. 141: 91–113. | 82-83 | | 32 |
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| Cephalanthera longifolia (L.) Fritsch | Capineri, R. & W. Rossi. 1987. Numeri cromosomici per la flora Italiana: 1127--1135. Inform. Bot. Ital. 19: 314–318. | 88-89 | | 32 |
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| Cephalanthera longifolia (L.) Fritsch | D'Emerico, S., P. Grünanger, A. Scrugli & D. Pignone. 1999. Karyomorphological parameters and C-band distribution suggest phyletic relationships within the subtribe Limodorinae (Orchidaceae). Pl. Syst. Evol. 217: 147–161. | 98-00 | | 32 |
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| Cephalanthera longifolia (L.) Fritsch | Schwarzacher, G. 2000. In C. Dobea & E. Vitek, Documented Chromosome Number Checklist of Austrian Vascular Plants. Verlag des Naturistorischen Museums Wien, Vienna. | 98-00 | | 32 |
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| Cephalanthera longifolia (L.) Fritsch | Schwarzacher, T., P. Ambros & D. Schweizer. 1980. Application of Giesma banding to orchid karyotype analysis. Pl. Syst. Evol. 134: 293–297. | 79-81 | | 32 |
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| Cephalanthera longifolia (L.) Fritsch | Scrugli, A. 1978. Numeri cromosomici per la Flora Italiana: 526-533. Inform. Bot. Ital. 10: 414–421. | 79-81 | | 33 |
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