| Colchicum ritchii var. guessfeldtianum (Asch. & Schweinf.) Stef. |
| CAI (Dg- S) |
| CAI (Dg Type- St.Catherine) |
| CAI |
| CAI (2) |
| Qottan قطان |
| Aqtan أقطان |
| Egypt (EX -Extinct) |
| Täckholm, V, and Drar. 1954. Flora of Egypt. Vol.3:Bull.Fac.Sci. 30: 1-644 |
| Hosni, A. Hosny, A., Shamso, E. and Hamdy, R. 2013. Endemic and Near-Endemic Taxa in the flora of Egypt. Egyp.J.Bot. 53(2):357-383 |
| Boulos, L. 2009. Flora of Egypt Checklist, Revised annotated edition, Al Hadara Publishing, Cairo, Egypt |
| Boulos, L.2005. Colchicaceae in L. Boulos, Flora of Egypt, vol 4. Al Hadara publishing, Cairo, Egypt |
| Täckholm, V. 1974. Students' Flora of Egypt ed.2. Cairo University |
| El Hadidi, M.N.& Fayed, A. 1994/95. Materials for Excursion Flora of Egypt (EFE). Taeckholmia 15 |
| El Hadidi, M.N. and Hosni, H.A. Conservation and threats in M.N. El Hadidi (2000)Flora aegyptiaca vo;.1(1):105-151.Palm Press and Cairo University Herbarium |
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