From the German Trollblume, meaning globe flower.
Herbaceous perennials. Leaves basal and on the stem, palmately divided, the segments usually further divided. Flowers terminal, large, with 5-20 or more outer sepal-like segments and 5-15 inner segments, mostly white to yellow or purple, each generally with a nectary at the base. Stamens numerous. Carpels 5-20 or so. Fruits a cluster of follicles.
Occasionally offered in nurseries. T. europaeus L. from Europe and N America has globe-shaped yellow flowers with 10-15 segments in summer. T. yunnanensis (Franch.) Ulbr. has mostly 5-8 yellow segments.
Flowers yellow; leaves palmately divided; fruit a cluster of follicles.
About 31 species from temperate Eurasia.
Source: (1997). Ranunculaceae. In: . Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.
Updated by: Rob Cross, December 2017