Flora of North America species comparison

erect, sparingly branched below inflorescence, robust, to 65 cm.

several, erect, freely branched, leafy, elongate, 30–80 cm, scabrid-puberulent and glandular-viscid.

basal few, usually withering by time of anthesis, blade spatulate;

cauline numerous, 2 per node, blade 1-veined, ovate-lanceolate to oblanceolate, 3–7 cm × 7–30 mm, margins entire, apex acute.

2 per node;

basal long-petiolate, blade oblanceolate, (2–)5–18 cm × 5–30 mm, base narrowed into petiole, apex ± acute, glandular-puberulent on both surfaces;

cauline not greatly reduced in distal stem, blade 5–15 cm × 10–20 mm, viscid glandular-pubescent, sparsely so in shade forms, proximal petiolate and blade oblanceolate, distal sessile and blade lanceolate, apex acute.

many-flowered, open, bracteate;

primary branches racemose, elongate, with sessile or shortly pedunculate cymes of 1–6 flowers per node;

bracts narrowly lanceolate, 3–12 mm, hyaline-margined, apex acute.

open, elongate, dichotomously branched, branches ascending, bracteate;

bracts leaflike, reduced distally.

ascending, ± straight, 1–2 times calyx, broadening at calyx base.

ascending, may be partially deflexed, rather slender, longer than calyx, viscid glandular-pubescent with septate hairs, septa colorless.

calyx often obscurely ca. 20-veined, elliptic, abruptly contracted at base, opening constricted to 1/2 its diam., slightly inflated in flower, 7–10 × 3–4 mm, in fruit tightly enveloping capsule, ovoid, thin, enlarging to 9–13 × 5–7 mm, herbaceous, margins narrow, membranous, dentate with broadly triangular lobes to 1 mm, glabrous, veins obscure, usually purple tinged, without conspicuous, pale commissures, longitudinal, parallel, not obviously reticulate;

petals white, clawed, claw equaling calyx, limb deeply 2-fid into 2 spatulate lobes, to 5 mm, appendages ca. 0.5 mm;

stamens exserted, to 2 times length of calyx;

filaments usually dark purple;

stigmas 3, exserted, to 2 times length of calyx.

calyx prominently 10-veined, tubular in flower, 8–12 × 2–4 mm, swelling to campanulate and 5–7 mm broad in fruit, not contracted proximally around carpophore, viscid glandular-pubescent, especially on veins, veins parallel, green, with pale commissures, those to lobes broadened distally, lobes erect, narrowly lanceolate, 3–4 mm, rigid, setose-scabrous, glandular-viscid, apex recurved;

corolla greenish white, claw equaling calyx, limb 2-lobed, ca. 3 mm, appendages ca. 0.5 mm, margins erose;

stamens equaling petals;

styles 3, equaling petals.

ovoid, equaling calyx and sometimes splitting it, opening by 6 recurved, narrowly lanceolate teeth;

carpophore ca. 1 mm.

slightly exserted from calyx, narrowly ovoid, opening by 6 teeth;

carpophore 1–2 mm.

grayish brown, plump, broadly reniform, 0.6–1 mm, with concentric rings of papillae;

papillae slightly longer than broad.

almost black, ellipsoid-reniform, ca. 1 mm, coarsely papillate;

papillae inflated.

= 24.

= 48.