Dwarf Cheeseweed - Malva neglecta
Other Names:
Common Mallow
Short-hairy annual or biennial. Stems prostrate to ascending, branched below, 20–50 cm. Leaf blades 2–5 cm long, cordate-orbicular, shallowly lobed. Flowers white to light blue; calyx 4–7 mm long, inflated in fruit; petals ca. 10 mm long with a pubescent claw. Schizocarp 4–7 mm across, the sections puberulent, not reticulate (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).