Ini nga species ginbahin ha masunod nga subspecies:[6]
- T. n. nigrescens
- T. n. petrisavii
- ↑ <![CDATA[Zohary,M. & Heller,D.]]>, 1984 The Genus Trifolium. Jerusalem.
- ↑ <![CDATA[Heywood,V.H. & Ball,P.W.]]>, 1968 Leguminosae.In:Flora Europaea Vol.2.ed.Tutin,T.G.et al.
- ↑ Roskov Yu.R., 2005 Editorial scrutiny: Northern Eurasia data Import (unpubl.)
- ↑ Viviani,D., 1808 Fl.Ital.Fragm.
- ↑ Roskov,Yu.R., 1993 Bot.Zhurn.(Leningrad) 78(6):76-79. Amoria nigrescens...
- ↑ 6.0 6.1 Roskov Y., Kunze T., Orrell T., Abucay L., Paglinawan L., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Decock W., De Wever A., Didžiulis V. (ed) (2014). "Species 2000 & ITIS Catalogue of Life: 2014 Annual Checklist". Species 2000: Reading, UK. Ginkuhà 26 Mayo 2014.CS1 maint: multiple names: authors list (link) CS1 maint: extra text: authors list (link)
- ↑ ILDIS World Database of Legumes