Polygala persicariifolia, Knotweed Leaved Milkwort

Polygala persicariifolia DC.
Family: Polygalaceae
Synonyms: Polygala buchanani Buch.-Ham. ex D. Don, Polygala septemnervia Merr., Polygala wallichiana Wight
Common name: Knotweed Leaved Milkwort

Erect herbs to 35 cm high. Leaves to 5 x 0.8 cm, linear-lanceolate, acuminate, glabrous. Racemes to 5 cm long, slender, pubescent, many-flowered. Flowers pink; inner sepals 6 x 6 mm, orbicular, white; outer sepals 3 x 2 mm, ovate; wing petals 2 mm long, cordate at base, hairy, dorsal petal 6 x 4 mm, obovate, glabrous, crest fimbriate, 2-lobed. Capsule 4 x 3 mm, glabrous; seeds 3 x 1 mm, pubescent, caruncle 1/2 as long as the seed.

Published article of Polygala persicariifolia:
A contribution to the study of saponins contained in polygalaceae the identification of the saponin extracted from Polygala persicariifolia
DELAUDE C - Source: Bulletin de la Societe Royale des Sciences de Liege  Volume: 42   Issue: 11-12   Pages: 635-638   Published: 1973