Taxonomic revision of the Allium filidens group (Amaryllidaceae) in Kyrgyzstan

On the basis of herbarium specimens and documented observations, the taxonomic confusion around Allium filidens s.l. (including A. filidentiforme) in Kyrgyzstan is resolved. The species status of A. filidentiforme is confirmed, and this species is classified in A. subsect. Crystallina, comb. nov. In Central Asia, the A. filidens group (A. subsect. Filidentia) includes species with whitish perianth colours (A. filidens s.str., A. karakense, A. ugami) and greenish perianth colours (A. mogianense, A. valentinae). The occurrence of A. filidens s.str. in Kyrgyzstan is confirmed. Allium valentinae is reported as new to Kyrgyzstan. The nomenclature of A. filidens is clarified, and its neotype is designated. The complete distributions of A. filidens, A. filidentiforme, A. mogianense, A. ugami and A. valentinae are mapped.