Flora of North America species comparison

1–several, clustered, terete or distally 4-ridged but not angled or winged, 0.8–6 dm, branching all or mostly alternate.

1–many, clustered, terete or distally 4-ridged but not angled or winged, 1.5–6(–9) dm, branching all or mostly alternate.

basal absent at flowering time, internodes between cauline leaves mostly 1.25+ times as long as subtending leaves;

blade elliptic- or oblong-lanceolate, 1.5–7 cm × 4–12(–16) mm.

all cauline at flowering time;

blade narrowly lanceolate or oblong (proximal) to linear (all or distal), 1–4 cm × 1–7(–12) mm.

open, few-flowered monochasia or solitary flowers at ends of branches;

pedicels 10–90(–110) mm.

open, few-flowered cymes or solitary flowers at ends of branches;

pedicels (20–)40–70(–90) mm.

7–12(–14)-merous;

calyx tube obconic to campanulate, 1.5–4 mm, mid- and commissural veins about equally prominent, 4-ridged;

lobes linear to oblong-lanceolate or occasionally narrowly spatulate or ± foliaceous, 4–20 mm;

corolla purplish pink or rarely white, eye yellow, projections of eye into corolla lobes oblong, sometimes shallowly 3-lobed, usually with a red border, tube (3–)4–8 mm, lobes oblanceolate to narrowly spatulate-obovate, (10–)12–25 × 3–11 mm, apex rounded to subacute;

anthers coiling circinately.

5-merous;

calyx tube turbinate to shallowly campanulate, 1–3 mm, mid- and commissural veins about equally prominent, not or low-ridged, lobes setaceous to narrowly linear;

corolla pink or rarely white, eye yellow, projections of eye into corolla lobes oblong, usually with a red border, tube 2–6 mm, lobes oblanceolate, 6–24 × 3–9(–11) mm, apex obtuse;

anthers coiling circinately.

 = 34 + 8B.

 = 34.