Flora of the Hawaiian Islands
Dicotyledon Literature for Veronica arvensis
Wagner et al., 1990, 1999.
   Plantaginaceae -- The Plantain Family Bibliography
      Veronica arvensis

Common name(s): speedwell, corn speedwell
General Information
DistributionNative to Eurasia, widely naturalized.In the Hawaiian Islands, naturalized on O`ahu, Moloka`i, Maui, Hawai`i.

Plantaginaceae - Veronica arvensis Plantaginaceae - Veronica arvensis

Taprooted annual herbs; stems erect or decumbent at base, 0.5-2(-3) dm long, unbranched to branched, moderately to sparsely hirtellous and + puberulent.
Leaves ovate to broadly ovate, 5-15(-20) mm long, 3-13 mm wide, sparsely to moderately hirtellous, margins crenate-serrate, apex rounded, base truncate to subcordate, petioles 0-3 mm long.
Flowers solitary in the upper leaf axils, forming a terminal raceme, pedicels 0.5-1(-2) mm long, bracts narrowly elliptic to linear-elliptic, gradually becoming reduced; calyx 3-5 mm long, the lobes lanceolate, the upper pair longer than lower ones; corolla inconspicuous, blue to violet, 1-1.5 mm long.
Capsules obcordate, strongly compressed, 2.5-3.5 mm long, 3-4 mm wide, the notch 0.5-0.8 mm deep, glandular puberulent along the margins.
Seeds 8-12 per cell, 0.7-1 mm long.
2n = 14, 16, 18