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..
[Nuttallia Barton, Fl. N. A. 2: 74. pl. 62. 1822.]
Herbs, with lobed or divided leaves, and showy axillary or terminal perfect flowers. Bractlets of the involucel 1-3, separate, or none. Calyx deeply 5-parted. Petals cuneate, truncate, often toothed or fimbriate. Stamen-column anther-bearing at the summit. Cavities of the ovary ∞, I-ovuled; style-branches of the same number as the cells of the ovary, stig-matic along the inner side. Carpels ∞ (10-20), arranged in a circle, I-seeded, indehiscent or 2-valved, beaked at the apex, the beak separated from the cavity by a septum. Seed ascending. [A Greek mythological name.]
Bractlets of the involucels none.
Flowers 1' broad; carpels very pubescent.
Flowers 1 1/2'-2' broad; carpels scarcely pubescent.
Bractlets of the involucels 3.
Leaves triangular, crenate; carpels not rugose.
Leaves orbicular, palmatifid; carpels rugose.
Sida alceoides Michx. Fl. Bor. Am. 2: 44. 1803.
Perennial, erect, 8-20' high, slender, strigose-pubescent, branched at the base from a thick woody root. Basal leaves triangular, palmately lobed or incised, 2'-3 1/2' long, slender-petioled; stem-leaves palmatifid, the divisions linear or cuneate, acute or obtuse; flowers corymbose or racemose at the summit, pink or white, about 1' broad; pedicels 1'-2' long, slender; involucels none; calyx-lobes triangular, acuminate; petals dentate and somewhat fimbriate; carpels strigose-pubescent and conspicuously rugose-reticulate on the back.
In dry soil, Kentucky to Nebraska, Kansas and Texas. May-Aug.
Callirhoë digitata Nutt. Journ. Acad. Phila. 2: 181. 1821.
Nuttallia digitata Bart. Flora N. A. 2: 74. pl. 62. 1822.
Similar to the preceding species, sparsely pubescent or glabrous. Divisions of the stem-leaves longer, narrowly linear, sometimes quite entire and 4-5' long, sometimes deeply incised; basal leaves sometimes cordate-triangular, crenate, lobed or divided; involucels none; flowers long-pedun-cled, 1 1/2'-2' broad, reddish-purple or lighter; petals beautifully fimbriate; calyx-lobes triangular to lanceolate, acuminate; carpels strongly rugose-reticulate, scarcely pubescent.
In dry soil, Illinois and Missouri to Kansas and Texas. April-July.