Flora of North America species comparison

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

usually single, occasionally 2–several, terete or distally ± 4-angled but not winged, 0.8–5 dm, branching all or 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;

blade elliptic to widely spatulate, 1–6(–10) cm × 4–30 mm.

corymboid dichasia of compact cymules;

pedicels 1–5 mm.

open, few-flowered cymes;

pedicels (10–)30–60 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.

5–7-merous;

calyx tube shallowly campanulate, 1.5–5 mm, midveins slightly more prominent than commissural, veins not ridged or midveins with low, narrow ridges, lobes oblanceolate to spatulate or ± foliaceous, 8–25(–32) mm;

corolla pale pink proximally, distally white, or white throughout except for eye, eye yellow, projections of eye into corolla lobes triangular, without a contrasting border, tube 3–6 mm, lobes oblanceolate to narrowly spatulate-obovate, 6–15 × 2–6 mm, apex rounded to obtuse;

anthers becoming slightly recurved.

 = 64.