Rorippa hengduanshanensis, Zheng & Yu & Xing & Han, 2021

Zheng, Quan-Jing, Yu, Chih-Chieh, Xing, Yao-Wu & Han, Ting-Shen, 2021, A new Rorippa species (Brassicaceae), R. hengduanshanensis, from the Hengduan Mountains in China, Phytotaxa 480 (3), pp. 210-222 : 219

Key to R. hengduanshanensis and related species

1. Racemes ebracteate, rarely lowermost 1 or 2 flowers bracteate ........................................................................................................2

– Racemes bracteate throughout or rarely only along lowermost third......................................................................... R. benghalensis

2. Seeds biseriate; fruit often 1–2.5 cm long, 1–1.5 mm wide ................................................................................................. R. indica

– Seeds uniseriate; fruit often 2–3.5 cm long, 0.5–1 mm wide.............................................................................................................3

3. Petals mostly absent, if present, often shorter than sepals, 1.5–2.5 mm long, 0.2–0.7(–1) mm wide; fruit straight, (1.5–) 2.5–3.5(–4) cm long, 0.7–0.9 (–1) mm wide ............................................................................................................................................. R. dubia

– Petals present, petals longer than sepals or equal to the sepals, (1.5–)2–3(–3.5) mm long, 1–2 mm wide; fruit often curved, (1.5–)2–3(–3.5) cm long, 0.5–0.7 (–8) mm wide ..................................................................................................... R. hengduanshanensis