Flora of North America species comparison

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

several, simple or branched, spreading to ascending, leafy, 10–30 cm, densely pubescent, glandular.

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.

2 per node, mostly cauline, blade 1.5–6 cm × 3–14 mm, apex sharply acuminate, pubescent and viscid on both surfaces;

distal sessile, blade elliptic-lanceolate;

proximal short-petiolate, blade oblanceolate.

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

leafy, flowers terminal and axillary.

straight, rather slender, 1/5 times to equaling calyx.

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 prominently 10-veined, tubular to narrowly obconic in flower, 16–20 × 4–5 mm, clavate and broadening to 7 mm in fruit, narrowed proximally around carpophore, coarsely glandular-pubescent and viscid, veins parallel, green, with pale commissures, lobes narrowly lanceolate, 5–7 mm, margins narrow, membranous, apex acuminate;

corolla white to pale yellow, sometimes purple tinged, clawed, ca. 2 times calyx, claw longer than calyx, broadened into obtriangular limb, limb 5–8 mm, cleft ca. to middle into (2–)4–8 lanceolate to oblong lobes, appendages 2, very short;

stamens exserted, shorter than petals;

styles 3, exserted, slender, shorter than petals.

equaling calyx, opening by 6 teeth;

carpophore less than 1 mm.

narrowly ovoid, equaling calyx, opening by 3 teeth that tardily split into 6;

carpophore 3–6 mm.

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

brown, broadly reniform, flattened, ca. 1.5 mm, sides rugose, margins papillate;

papillae conic, acute.

= 24.

= 96.