Root – the plants are attached to the soil by highly developed rhizome, which can be extremely large. It is also used for vegetative reproduction. Dry petioles and stipules remain on it for a long time.
Stem – each species very different in height (5-80 cm) and position (upright, elevated, arch-shaped, etc.). A very important group of features is the amount, appearance, and type of hair, which are of taxonomical importance.
Leaf – the basal leaves are aggregated into a rosette and are used to determine the species. Their general shape may be rotund to reniform, ± palmately lobed, segmented, or dissected. The lobes are more or less dentate; the teeth are different in shape and size. The cauline leaves are much smaller than the basal ones and often concrescent with the stipules.
Flowers – there is high morphological variability, even within a single individual. The inflorescence is paniculate; the florets have stalks of different size. The hypanthia are semispherical, bell-shaped or reverse-conical, with a glandular nectar disc at the mouth. The calyx is double, with no petals. The inner and proper sepals are 4 of each, green, yellowish-green, or yellow. The stamens (4-5) are located in the mouth of the hypanthium, with short filaments and rudimentary anthers. They are attached out of the nectar disc. The carpel is single, enclosed in the hypanthium. The style is filiform, exceeding the nectar disc, with a globular stigma.
Fruit – flat ovate, wholly or partially enclosed in the hypanthium, with a tapering apex. The achene is yellowish-brown and fall of along with the hypanthium.
Pictures of the morphology and variability of the root, stem, leaves, and flowers are coming soon.