This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Herbs, with entire cordate or divided leaves, and axillary or terminal, solitary or racemose, short-pedicelled perfect flowers. Calyx 5-cleft. Bractlets of the involucels small, 1-3 or none. Stamen-column anther-bearing at the apex. Cavities of the ovary 5-∞, I-ovuled. Style-branches of the same number, stigmatic at the summit only, forming capitate stigmas; carpels indehiscent or imperfectly 2-valved, falling away from the axis at maturity, their apices pointed or beaked. Seed ascending. [Greek, star-mallow.]
About 75 species, natives of America and South Africa, 2 of them widely distributed as weeds in tropical regions. In addition to the following, about 15 other species inhabit the southern and western United States. Type species: Malvastrum coccineum (Pursh) A. Gray.
Leaves lanceolate-oblong, dentate.
Leaves pedately 5-parted, the lobes incised.
22. 1848. Malveopsis hispida Kuntze, Rev. Gen. Pl. 72. 1891.
Annual, erect with the habit of a Sida, slender, branching, pubescent with appressed hairs, 6'-12' high. Leaves oblong-lanceolate, or linear-oblong, petioled, acute, finely dentate with somewhat distant teeth, 9"-10" long, 2"-4" wide; flowers yellow, 4"-6" broad, mostly solitary in the axils of the upper leaves, short-peduncled; bractlets of the involucels 2-3, linear, shorter than the ovate-triangular pubescent acute calyx-lobes; petals about equalling the calyx; carpels 5, somewhat pubescent, reniform, 2-valved at maturity.
Malva coccinea Nutt. in Fraser's Cat. Name only. 1813.
Cristaria coccinea Pursh, Fl. Am. Sept. 454. 1814.
M. coccineum A. Gray, Mem. Am. Acad. (II.) 4: 21. 1848.
Perennial, erect or ascending, 4'-10' high, freely branched, densely and silvery stellate-pubescent. Lower leaves 1'-2' wide, ovate-orbicular in outline, slender-petioled, the uppermost nearly sessile, all pedately 3-5-parted; lobes cuneate to linear, incised, mainly obtuse; flowers red, 6"-9" broad, in dense short terminal spicate racemes; bractlets of the involucels commonly none; petals much longer than the lanceolate acutish calyx-lobes; carpels 10-15, rugose-reticulated, indehiscent, 1-seeded (rarely 2-seeded).