Ranunculus spissidens (Markl. ex Fagerstr.)

Ranunculus spissidens (Markl. ex Fagerstr.)

Ericss. 1992. In: Ann. Bot. Fenn. 29(2): 152.

Most important morphological characters: small or medium-sized (slim) plant with linear, narrow toothless cauline leaves. Most developed basal cycle leaves medium-sized with angle 30–70° of leaf base. Basal cycle leaves mostly trilobated with no leaves with whole leaf blade – most developed leaves with 3-lobed leaf blade with lobed lateral segments, but, at same time, at least one leaf blade with whole, divided but not lobated lateral segments. Flowers with fully or nearly fully developed petals ( Fig. 18 View Figure 18 ).

Distribution and ecology in Latvia: occurs very rarely in central and northern part of Latvia, only in three localities in Lubāna mitrājs Nature Reserve and near Kauguri in Gauja National Park. Species is known from different forest habitats – wet birch forests and shrublands as well as from wet pine forest on mineral soil.