Small Whorled Cheeseweed - Malva parviflora
Other Names:
Cheeseweed Mallow, Egyptian Mallow, Small-flowered Mallow
Puberulent annual or biennial. Stems mostly ascending, 10–70 cm. Leaf blades 1–5 cm long, cordate-orbicular, shallowly 5- to 7-lobed with crenate margins. Flowers whitish; petals 3–4 mm long with a glabrous claw; calyx barely shorter than the petals. Schizocarp 4–7 mm across, the sections puberulent and reticulate on the outside margin (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).