Flora of North America species comparison

erect, simple or branched, slender, to 80 cm, subglabrous to retrorsely puberulent especially proximally, distal internodes frequently glutinous.

simple, branched in inflorescence, (10–)20–40(–70) cm.

2 per node;

blade with margins ciliate toward base, apex acute to obtuse;

basal blades oblanceolate, spatulate;

cauline narrowly oblanceolate to linear, 1–9 cm × 2–15 mm, scabrous or puberulent, rarely glabrous on both surfaces.

basal withering before flowering, blade lanceolate-spatulate, 2–5 cm;

cauline sessile to amplexicaulous, blade lanceolate to ovate or elliptic, 1–6 cm × 5–25 mm, apex acute.

cymose, open, branches usually ascending, several- to many-flowered, 1-flowered in depauperate specimens.

cymose, bracteate;

cyme capitate or with flowers clustered at end of slender branches;

bracts lanceolate-acicular, 2–10 mm.

0.1–0.5 cm.

mature calyx prominently 10-veined, campanulate to ovate, 5–9 × 3–5 mm, margins dentate, glabrous, veins parallel, with pale commissures;

lobes usually purple, triangular, acute, ca. 1 mm;

petals white, often suffused with dark red, rarely wholly dark red, limb ovate, usually 2-lobed, ca. 2.5 mm, slightly longer than calyx, rarely petals absent, claw narrow, appendages 0.1–0.4 mm;

stamens included;

styles 3;

stigmas included.

calyx usually purple tinged, 10-veined, elongate, clavate, lobed, constricted proximally into narrow tube, 13–17 × 2.5–4 mm, rather membranous;

lobes ovate-triangular, ca. 1 mm, apex obtuse;

petals pink (rarely white), unlobed, limb obovate, ca. 5 mm, base cuneate into claw 6–8 mm, auricles absent, appendages linear to lanceolate, 2–3 mm, apex acute;

stamens slightly longer than petal claws;

styles 3(–4), exserted.

equaling calyx, opening by 6 teeth;

carpophore less than 1 mm.

oblong, 7–10 mm, opening by 6 (or 8) spreading teeth;

carpophore 7–8 mm, glabrous.

dull gray-black, reniform, 0.5–0.8 mm diam., finely papillate.

dark brown, reniform-rotund, less than 1 mm diam., rugose.

= 24.

= 24 (Europe).