MADDER FAMILY.
Fig 176. [Blue Field Madder. Sherardia arvensis] L.
![[Blue Field Madder. Sherardia arvensis]](#1525880611323293367_fig-176.jpg.id-208771799538743248.wrap-0.html.html){kind=link}
Blue Field Madder. Sherardia arvensis L. The parts often called seeds are in reality the half-fruits ripened, each one bearing at the apex three, white, pointed, persistent calyx lobes, the inner face showing a vertical groove, and in some of the fruits the calyx is broken off. Surface dull brown, clothed with small white hairs, obovoid, 2–2.5 mm. long. Introduced from Europe, not often found in the northern states.