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.

usually single, occasionally 2–several, terete or distally ± 4-angled but not winged, 0.8–5 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 elliptic to widely spatulate, 1–6(–10) cm × 4–30 mm.

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

pedicels 10–90(–110) mm.

open, few-flowered cymes;

pedicels (10–)30–60 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.

5–7-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.

 = 34 + 8B.

 = 64.