Flora of North America species comparison

usually simple proximal to inflorescence, 30–50(–70) cm, puberulent and shortly stipitate-glandular, especially distally.

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

2 per node, gradually reduced distally;

basal petiolate, blade oblanceolate, spatulate, 5–9 cm × 7–15 mm (including petiole), apex acute to obtuse, usually glabrous adaxially, sparsely pubescent abaxially;

cauline in 4–6 pairs, blade linear-lanceolate, 1–6(–8) cm × 2–6 mm, puberulent and shortly stipitate-glandular.

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.

thyrsate, 3–25-flowered, open, bracteate, pedunculate, stipitate-glandular, viscid;

bracts narrowly lanceolate, 2–25 mm, apex acuminate.

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.

ascending.

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

calyx prominently 10-veined, narrowly campanulate, umbilicate, somewhat clavate and constricted below middle around carpophore, 9–15 × 3–4 mm in flower, broadening to 7 mm in fruit, membranous, shortly stipitate-glandular, veins parallel, slender, tinged dark red, with pale commissures, lobes ovate-lanceolate, obtuse, 2–3 mm, margins scarious;

corolla creamy white, sometimes pink tinged, clawed, claw equaling calyx, glabrous, broadening only slightly into limb 3–8 mm, limb with 4–6 linear lobes, some splitting to 10 linear segments, appendages 4–6, linear, 1–1.5 mm, apex acute;

stamens ca. equaling petals;

filaments glabrous;

stigmas 3(–5), ca. equaling petals.

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.

ellipsoid, slightly longer than calyx, opening by 6 (or 8 or 10) very brittle teeth;

carpophore 2–4 mm.

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

carpophore ca. 1 mm.

brown, ± reniform, angular, glossy, shallowly tuberculate.

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

papillae slightly longer than broad.

= 48.

= 24.