Flora of North America species comparison

single, terete, 2.5–8(–10) dm, branching all or mostly alternate.

single, terete, 1.5–9(–11) dm, branching alternate.

basal and cauline usually present at flowering time;

basal blades oblanceolate to spatulate, 4–10 cm × 9–25 mm;

cauline blades abruptly differentiated, linear to lanceolate, 1.5–5(–6.5) cm × 1–8(–15) mm.

all cauline at flowering time;

blade mostly linear, 1–5 cm × 0.5–2 mm or those near base to 5 mm wide, distal leaves filiform.

flowers solitary or paired at ends of branches;

pedicels (30–)80–120 mm.

open, few-flowered cymes or solitary flowers;

pedicels (20–)40–120 mm.

8–12(–14)-merous;

calyx tube shallowly campanulate, (2–)3–4(–8) mm, mid- and commissural veins about equally prominent, not ridged;

lobes narrowly linear to subulate, 4–20 mm;

corolla pink or rarely white, eye yellow, projections of eye into corolla lobes oblong, usually with a red border, tube 5–9 mm, lobes narrowly spatulate-obovate, 16–35 × 5–12 mm, apex rounded to obtuse;

anthers coiling circinately.

5-merous;

calyx tube campanulate, 6–25(–30) mm, midveins slightly more prominent than commissural veins, veins not ridged or midveins low-ridged, lobes subulate to linear;

corolla pink or occasionally white, eye yellow, projections of eye into corolla lobes oblong, usually with red border, tube 3–8 mm, lobes narrowly to medium-widely obovate, (13–)17–30 × 5–15 mm, apex rounded to subacute;

anthers coiling circinately.

 = 36.

 = 36.