Flora of North America species comparison

several, clustered, terete, 5–14 dm, branching opposite throughout.

single, 4-angled with wings 0.2–0.3 mm wide, (0.5–)3–7.5(–9) dm, branching proximally mostly opposite, distally mostly alternate.

all cauline at flowering time;

blade lanceolate to ovate-oblong or ovate, 2.5–6(–8.5) cm × 5–30(–45) mm.

all cauline at flowering time or basal sometimes persistent;

basal blades oblong-spatulate to ovate-orbiculate;

cauline blades lanceolate to widely ovate, 1–4 cm × 5–30(–40) mm.

corymboid dichasia of compact cymules;

pedicels 1–5 mm.

open cymes;

pedicels 10–60 mm.

5-merous;

calyx tube campanulate, 1–2 mm, mid- and commissural veins about equally prominent, not ridged or with low, narrow ridges, lobes triangular to linear-subulate, 0.1–3 mm;

corolla white or cream throughout, tube 2–4 mm, lobes oblong-oblanceolate, 4–7(–9) × 2–3(–4) mm, apex rounded to obtuse;

anthers recurving.

5(or 6)-merous;

calyx tube shallowly campanulate, 1–2 mm, mid- and commissural veins about equally prominent, low-ridged, lobes linear to narrowly oblong-lanceolate or occasionally ± foliaceous, 4–15(–18) mm;

corolla pink or occasionally white (sometimes drying orange), eye greenish yellow, projections of eye into corolla lobes triangular, usually with dark red border, tube 4–7 mm, lobes ± narrowly spatulate-obovate, 6–22 × 2–9(–11) mm, apex rounded to subacute;

anthers coiling circinately.

 = 38.