Ranunculus heikkinenii (Markl.) Ericss. 1992

Evarts-Bunders, Pēteris, Evarte-Bundere, Gunta, Krasnapoļska, Dana, Svilāne, Inita & Bojāre, Aiva, 2021, Studies On The Species Of Ranunculus Auricomus Complex In The Flora Of Latvia: Ranunculus Fallax Group, Acta Biologica Universitatis Daugavpiliensis 21 (1), pp. 37-58 : 45

8. Ranunculus heikkinenii (Markl.) Ericss. 1992 , Ann. Bot. Fenn. 29, 2: 141. Heikinena gundega ( Fig. 10 .)

Most important morphological characters:

Robust plant with oblanceolate to rhomboidally lanceolate, sessile or subsessile, irregularly toothed (6–9 teeth) or sometimes even lobed cauline leaves. Most developed basal cycle leaves robust with angle 50–130° of leaf base, with at least one leaf with whole blade and at least one – with 3-lobed leaf blade with wide, non-overlapped and deeply lobed lateral segments. Flowers with completely developed petals. Species resembling R. antigohyllus , from which differs by significantly bigger, most developed basal leaves with whole, unlobed leaf blade.

Distribution and ecology in Latvia: Occurs rarely and unequally in Latvia, mostly in central part – in different habitats – natural alluvial forests, different contact zones – roadsides, ditches and other habitats.

Figures

Fig. 10. Ranunculus heikkinenii (Markl.) Ericss.