Erythronium L.
Erythronium is a genus with ca. 27 predominantly New World species. Only E. dens-canis (and some segregates) are of Eurasian origin (Allen & Robertson 2002). None is native in Belgium but E. dens-canis is sometimes grown as an ornamental and has been recorded as an escape or relic.
Literature:
Allen G.A. & Robertson K.R. (2002) Erythronium. In: Flora of North America Editorial Committee (eds.), Flora of North America, vol. 2. Oxford University Press, New York-Oxford: 153-164. [available online at: http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=112169]
Allen G.A., Soltis D.E. & Soltis P.S. (2003) Phylogeny and biogeography of Erythronium (Liliaceae) inferred from chloroplast matK and nuclear rDNA ITS sequences. Syst. Bot. 28(3): 512-523. [available online at: https://www.researchgate.net/profile/Douglas_Soltis/publication/23268732...
Clennett J.C.B. (2006) A taxonomic revision of Erythronium L. (Liliaceae). Milton Keynes: Open University, PhD Thesis: 290 p.
Clennett J.C.B., Chase M.W., Forest F., Maurin O. & Wilkin P. (2012) Phylogenetic systematics of Erythronium (Liliaceae): morphological and molecular analyses. Botanical Journal of the Linnean Society 170(4): 504-528. [available online at: https://academic.oup.com/botlinnean/article/170/4/504/2416135]
Kelly J. (1997) The Erythronium species of California and SW Oregon. New Zealand Garden J. 2(2): 5-8.
Mathew B. (1992) A taxonomic and horticultural review of Erythronium L. (Liliaceae). Bot. J. Linn. Soc. 109(4): 453-471. [available online at: https://watermark.silverchair.com/j.1095-8339.1992.tb01444.x.pdf?token=A...
Mathew B. (1998) The genus Erythronium. Quart. Bull. Alp. Gard. Soc. 66(3): 308-322.
Matthews V.A. & Lees J.M. (1986) Erythronium. In: Walters S.M. & al. (eds.), The European Garden Flora, vol. 1. Cambridge University Press, Cambridge: 177-178.
Shevock J.R., Bartel J.A. & Allen G.A. (1990) Distribution, ecology, and taxonomy of Erythronium (Liliaceae) in the Sierra Nevada of California. Madrono 37(4): 261-273. [available online at: https://www.biodiversitylibrary.org/part/171075#/summary]
Takahashi M. (1987) Pollen morphology in the genus Erythronium (Liliaceae) and its systematic implications. Amer. J. Bot. 74(8): 1254-1262. [available online at: https://www.researchgate.net/profile/Masamichi_Takahashi3/publication/27...