Flora of North America species comparison

1 or 2(or 3), (3–)5–12(–15) cm, puberulent or retrorsely hairy, sometimes glabrate.

erect, glabrous or puberulent.

basal and proximal cauline, blade oblanceolate to narrowly oblanceolate or spatulate, 12–78 × 2–18 mm, surfaces glabrous or glabrate;

cauline 1–3 pairs, blade narrowly lanceolate to linear, 8–28 × 1–3 mm.

basal and cauline, cauline smaller, opposite, sometimes alternate distally;

petiole present or absent;

blade not fleshy, ± leathery or not, margins entire.

1–5 cm, verticillasters 2–7, continuous, sparsely puberulent and, usually, sparsely glandular-puberulent;

bracts ovate to lanceolate, proximal ones 8–19 × 4–7 mm.

terminal, spikelike, secund racemes;

bracts present.

0–4 mm, glabrous or sparsely glandular-pubescent.

present or absent;

bracteoles absent.

calyx tube 8–9 mm, sparsely glandular-puberulent, lobes triangular, 1.5–2.5 × 2–2.5 mm;

corolla greenish white or creamy white, 10–15 mm, glabrous externally, palate and proximal parts of abaxial limb densely white-lanate, hairs to 1.5 mm, tube 3–4 mm, pollen sacs 0.5–0.6 mm, explanate;

staminode 5–7 mm;

style 10–12 mm.

bisexual;

sepals 5, proximally connate, calyx radially symmetric, cylindric to funnelform, lobes triangular to narrowly ovate;

corolla greenish white, creamy white, or pale lavender, bilaterally symmetric, bilabiate, tubular-funnelform, tube base not spurred or gibbous, throat not densely pilose internally, lobes 5, abaxial 3, adaxial 2;

stamens 4, proximally adnate to corolla, didynamous, filaments glabrous;

staminode 1, ± filiform;

ovary 2-locular, placentation axile;

stigma capitate.

capsules, dehiscence septicidal.

8–9.5 × 4.5–6 mm.

tan to brown, ellipsoid to fusiform with tail on each end, 3–4.2 mm.

10–20, tan or brown, ellipsoid to fusiform or ellipsoid-disciform, wings present.

= 8.

= 16.