Flora of North America species comparison

simple or with 1–10 ascending branches proximally, 2–37 cm, glabrous proximally, puberulent to glandular-puberulent distally.

erect, not fleshy, glabrous or hairy.

puberulent to glandular-puberulent;

proximal cauline: blade linear, 5–25 mm;

cauline: blade ± ovate or obovate, 8–50 mm, base sessile, margins pinnatifid, rarely bipinnatifid, lateral lobes 2–11.

cauline, usually subopposite to opposite proximally, alternate distally;

petiole absent;

blade not fleshy, not leathery, margins entire (proximal cauline leaves) or pinnatifid, rarely bipinnatifid.

terminal, spikelike racemes;

bracts present.

0.3–0.5 mm, glabrous.

present;

bracteoles absent.

calyx 6–13 mm, puberulent to glandular-puberulent, tube 4–7 mm, lobes triangular to narrowly lanceolate, 1–4 × 1–1.5 mm;

corolla yellow, rarely yellow and white, or white, fading to rose pink, 10–25 mm, densely hairy, beak dark purple, not hooked, abaxial lobes spreading, 2–5 mm, throat abruptly indented, forming a fold under abaxial corolla lip, adaxial lobes projecting;

stamens included, pollen sac yellow, 1.5–2 mm, glabrous, dehiscing longitudinally;

style 12–22 mm, glabrous;

stigma capitate.

sepals 4, calyx bilaterally symmetric, tubular or campanulate, lobes triangular to narrowly lanceolate;

petals 5, corolla yellow, white, purple, or white, fading to rose pink, strongly bilabiate, tubular and club-shaped, abaxial lobes 3, saccate, throat folded proximal to abaxial lips (except in T. pusilla), adaxial 2, adaxial lip beaked, ± straight, opening directed forward;

stamens 4, didynamous, filaments glabrous, pollen sac 1;

staminode 0;

ovary 2-locular, placentation axile;

stigma capitate, 2-lobed, or filiform to subcapitate.

4–8 × 2.5–4.5 mm, glabrous.

dehiscence loculicidal.

30–100, ovoid, 0.5–1 mm.

10–100, dark brown, ovoid to ellipsoid, wings absent.

racemes interrupted, dense distally, 1–24 cm;

peduncle absent;

bracts pinnatifid, rarely bipinnatifid, ± ovate, 2–30 mm, lateral lobes 2–8.

= 11.