Malva parviflora L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Much like nos. 5 [Malva neglecta Wallr.] and 6 [Hypericum boreale (Britton) E. P. Bicknell]; pedicels mostly less than 10 mm, even in fr; cal strongly accrescent and reticulate-veiny in fr; fr as in no. 6, but the margins of the carpels narrowly winged; 2n=42. Native of the Mediterranean region, widespread as a weed in c. and w. U.S., and local with us.