• Scientific Name: Lysimachia arvensis var. caerulea (L.) Turland & Bergmeier
• Ref: Willdenowia 41:185. 1911
• Synonyms:
  • Anagallis arvensis f. azurea Hyl.
  • A. arvensis var. caerulea (L.) Gouan
  • A. caerulea L.
  • A. verticillata All.
• English Common Name: blue-scarlet pimpernel
• Chinese Common Name: 蓝花琉璃繁缕 lánhuā liúlí∙fánlǚ
• Japanese Common Name: ルリハコベ [瑠璃繁縷] rurihakobe
• Family: Primulaceae
• Genus: Lysimachia
• Distribution: Cultivated areas, wasteland, roadsides. Fujian, Guangdong, Taiwan, Zhejiang [Bhutan, India, Japan, Kashmir, Nepal, Pakistan, Russia; NW Africa, W Asia, Australia, Europe, North America, South America].
• Photo: Wenzhou, Zhejiang

Herbs annual or biennial, 10--30 cm tall. Stems quadrangular, short winged on ridges, usually branched from base. Leaves opposite, occasionally in whorls of 3, sessile, ovate to narrowly ovate, 7--18(--25) X 3--12(--15) mm, minutely glandular punctate mainly abaxially, base subrounded, margin entire, apex obtuse or acute. Pedicel recurved in fruit, 2--3 cm. Calyx lobes linear-lanceolate, 3.5--6 mm, hyaline margined, apex long acuminate, costate. Corolla blue, rotate, 4--6 mm, parted nearly to base; lobes obovate-elliptic, 2.7--3 mm wide, margin entire to denticulate. Stamens 1/3--1/2 as long as corolla; filaments pubescent. Style ca. 1.5 mm. Capsule ca. 3.5 mm in diam. 2n = 22, 28, 40@. (Flora of China)