This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol1", 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..
Perennial, somewhat mucilaginous herbs, with mostly narrow and elongated leaves, and showy regular flowers in terminal or terminal and axillary umbels subtended by leaf-like or scarious bracts. Sepals 3, herbaceous. Petals 3, obovate, ovate or orbicular, sessile. Stamens 6, all alike and fertile, or those opposite the petals shorter; filaments bearded or glabrous. Ovary 3-celled, the cells 2-ovuled. Capsule 3-celled, loculicidally 3-valved, 3-12-seeded. [In honor of John Tradescant, gardener of Charles I, died 1638.]
Leaves linear or linear-lanceolate, 12-50 times longer than broad.
Stems 1' to rarely 4' long; bracts longer than the leaves.
Stems elongated, 4'-3° long; bracts mostly shorter than the leaves.
Foliage bright green; pedicels, like the sepals, pilose or villous.
Pedicels and sepals pilose with gland-tipped hairs.
Stems 4'-1° tall; bracts lanceolate, the bases sac-like, whitish, broader than the leaves.
Stems 1°-2 1/2° tall; bracts linear, the bases not sac-like, green, narrower than the
Pedicels and sepals villous with non-glandular hairs.
Foliage glaucous; pedicels glabrous; sepals with a tuft of hairs at the apex.
T. reflex a.
Leaves lanceolate, 2-10 times longer than broad.
Slender; stems strict; cymes solitary and terminal or on corymbed branches; species Alleghanian.
Stout; stems zigzag; cymes terminal and sessile in the upper axils; species campestrian.
Villous with long spreading hairs, stems only 1'-4' high, the plant often appearing nearly acaulescent; leaves mostly basal, 6'-12' long, 4"-8" wide, grasslike, linear-lanceolate, acuminate, ciliate, at least at the base, glabrous or villous toward the apex; bracts similar to the leaves, but usually more elongated; umbel 4-12-flowered, sessile in the bracts, the pedicels slender, 1'-2' long, villous; sepals oblong; corolla about 1' broad, blue or rose-purple.
In dry soil, Indiana to Kentucky and Missouri. April-May.