Taxonomic revision of the genus Trigonosciadium (Apiaceae) in Turkey Author Eroğlu, Hüseyin Yüzüncü Yıl University, Faculty of Sciences, Department of Biology, 65090, Tuşba-Van, Turkey; Author Behçet, Lütfi Bingöl University, Faculty of Science and Arts, Department of Biology, 1200, Bingöl, Turkey. Author Pinar, Süleyman Mesut Yüzüncü Yıl University, Van School of Health, 65090, Tuşba-Van, Turkey. text Phytotaxa 2017 2017-07-11 313 1 43 60 http://dx.doi.org/10.11646/phytotaxa.313.1.3 journal article 10.11646/phytotaxa.313.1.3 1179-3163 13700212 Key to the Turkish species of the genus Trigonosciadium : 1. Stem terete below; radiant petal 6–10 mm ; two of the sepals linear-lanceolate, 1–3 mm long............................. 3. T. intermedium - Stem angled below; radiant petal up to 6 mm ; sepals shorter than 1 mm ..........................................................................................2 2. Petals 2–3 mm , yellow, radiant, bracteoles longer than pedicel.............................................................................. 4. T. lasiocarpum - Petals 4–6 mm , white, radiant; bracteoles not longer than pedicels...................................................................................................3 3. Stem triquetrous below, purple spotted, nodes dense villous ..................................................................................... 2. T. viscidulum - Stem 4–5 angled below, not spotted (even if purple), nodes not villous.................................................................... 1. T. tuberosum