Pilosella piloselloides
Pilosella piloselloides var. praealta (syn. P. praealta; Hieracium praealtum) (Asteraceae, Cichorieae) is a model plant used to study gametophytic apomixis, the asexual formation of seeds. Otherwise known as Mendel's Hawkweed it is a perennial herbs that form mats of tight, interconnected rosettes with thick underground root systems, and often with above-ground root systems (stolons) as well. Leaves (25-150 x 6-50 cm) are dull green to dark green above, usually paler (occasionally purplish) below, with those at the base of the plant usually slightly toothed, and with bristly hairs above and star-shaped hairs below. Thin stems (10-75 cm) have milky sap. Lemon or yellow dandelion-like flowers (orange, purple when dry, in H. aurantiacum and H. x stoloniflorum), which occasionally have red stripes on outer face and are followed by fluffy seeds with dirty-white hairs (4-8 mm).