This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", 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..
[Seymeria Pursh, Fl. Am. Sept. 736. 1814.]
Erect stout branched annual or perennial herbs, mostly with opposite leaves, at least the lower 1-2-pinnately parted or dissected, and yellow flowers solitary in the axils, or in terminal bracted spikes or racemes. Calyx campanulate, 5-cleft or 5-parted. Corolla slightly irregular, campanulate or rotate, the tube short, broad, the limb 5-lobed, the lower lobe exterior in the bud. Stamens 4, slightly unequal, scarcely or not at all exserted; filaments short, villous, at least near the base; anthers 2-celled, the sacs parallel, distinct. Style short or slender. Capsule globose or ovoid, acute and more or less compressed at the summit. Seeds numerous, reticulated. [Named for Adam Afzelius, 1750-1812, professor at Upsala.]
About 10 species, natives of North America, Mexico and Madagascar. Besides the following, 4 others inhabit the southern United States. Type species: Anonymos cassioides Walt.
1835. A. macrophylla Kuntze, Rev. Gen. Pl. 457. 1891.
Annual (?), puberulent or glabrate; stem sparingly branched, or simple, 4°-6° high. Lower leaves long-petioled, pinnately parted, 6'-15' long, their segments lanceolate, coarsely dentate, irregularly incised, or pinnatifid; upper leaves short-petioled or sessile, oblong or lanceolate, 1'-3' long, entire, obtuse or acutish at the apex, narrowed at the base, each with a sessile flower in its axil; flowers 5"-7" long; calyx-lobes lanceolate or ovate, acute, about as long as the tube; corolla 2-3 times as long as the calyx, woolly in the throat; style short, club-shaped; capsule globose-ovoid, 3"- 4" high, twice as long as the calyx.
In moist thickets and along streams, Ohio to Iowa, Nebraska, Kentucky and Texas. Aug.-Oct.