Botanical name: Lysimachia japonica Family: Primulaceae (Primrose family)
Japanese Yellow Loosestrife is a perennial herb from Eastern Himalayas. Stems are prostrate to rising, 7-15 cm, usually branched from base, with grayish multicellular hairs. Oppositely arranged leaves are carried on 2--5 mm long, narrowly winged stalks. Leaves are broadly ovate to circular, 1-2.5 X 0.7-2 cm, velvety, transparent gland dotted, base rounded to flat, tip pointed to blunt. Veins are 2 or 3 pairs. Flower-stalks, recurved in fruit, are 3-8 mm. Flowers are borne singly in leaf axils. Sepals are lanceshaped, 3-4 mm, enlarging to 7-8 mm in fruit, velvety. Flowers are yellow, 5-8 mm in diameter, petals triangular-ovate, transparent gland-dotted. Filaments are basally fused into a about 1 mm high ring, free parts 1-2 mm. Anthers are ovate. Style is 2-3 mm. Capsule is round, 3-4 mm in diameter, velvety at tip. Japanese Yellow Loosestrife is found on grassy banks, ditches, streamsides, at altitudes of 500-2000 m, in China, Bhutan, Sikkim, Darjeeling, Indonesia, Japan, Kashmir and Korea. Flowering: March-June.
Identification credit: Krishan Lal
The flower labeled Japanese Yellow Loosestrife is ...