Thalictrum reniforme and its morphologically similar species, 1753

Zeng, You-Pai, Yuan, Qiong & Yang, Qin-Er, 2022, Thalictrum cuonaense (Ranunculaceae) is merged with the Himalayan T. reniforme, with notes on its morphologically similar species, Phytotaxa 554 (3), pp. 221-244 : 242

Key to Thalictrum reniforme and its morphologically similar species

1a. Stipules broadly auricular; sepals purplish-green, narrowly elliptic, smaller (4.5‒6 mm long), caducous, absent when flowering T. neurocarpum

1b. Stipules sheath-like; sepals usually purple, ovate, broadly ovate or broadly elliptic, usually larger (5‒15 mm long), not caducous, present when flowering ......................................................................................................................................................................2

2a. Stems (at least distal part), mature leaves and achenes glandular-pubescent; achenes flattened-compressed...................................3

2b. Stems, mature leaves and achenes glabrous; achenes slightly compressed .......................................................................................4

3a. Leaf axils with bulbils; achenes wingless, laterally not ribbed ........................................................................................ T. chelidonii

3b. Leaf axils without bulbils; achenes winged, laterally prominently 2‒3-ribbed ................................................................. T. delavayi

4a. Inflorescence lax, leafy, corymbiform; styles of achenes recurved at apex ................................................................ T. diffusiflorum

4b. Inflorescence more or less denser, not leafy, paniculiform; styles of achenes straight .................................................... T. reniforme