Flora of North America species comparison

erect, usually unbranched proximal to inflorescence, sometimes branched from decumbent base.

erect-ascending, unbranched or branched from base, unbranched proximal to inflorescence, conspicuously ribbed distally.

blade narrowly elliptic to oblanceolate or narrowly obovate or oblong, larger 5–18 × 1.4–3.1 mm, largest at midstem, reduced in size both proximally and distally, apex obtuse to acute.

proximal 5–20 pairs opposite, distal opposite or alternate, erect to spreading;

stipular glands absent;

blade elliptic to oblanceolate or obovate, 15–35 × 4–10 mm, margins entire, not ciliate, apex obtuse or acute.

panicles.

elongate panicles.

6–35 mm.

0–4 mm.

sepals broadly lanceolate to ovate, outer sepals 2–3 mm, inner sepals broader, shorter, margins of all or sometimes only of inner sparsely but conspicuously glandular-toothed, apex acute to acuminate;

petals white or whitish, base yellowish, 2–5 mm, obovate;

stamens 1 mm, anthers 0.2–0.3 mm;

styles 0.5–1 mm.

sepals persistent, lanceolate to ovate, 1.5–3.5 mm, margins not scarious, eglandular or inner with a few delicate small marginal glands, apex acute or apiculate;

petals pale yellow, obovate, 2.7–4.6 mm;

stamens 1.5–2 mm;

anthers 0.3–0.7 mm;

staminodia absent;

styles distinct, 1.2–2 mm;

stigmas capitate.

ovoid, 2–2.5 × 2 mm, fragile and subject to crushing when pressed;

segments persistent on plant, septa margins ciliate.

globose, carpels convex abaxially, 1.3–1.9 × 1.8–2.3 mm, apex depressed, dehiscing freely into 10, 1-seeded segments, segments falling freely, false septa nearly complete, proximal margins not ciliate.

1–1.5 × 0.6–0.8 mm.

1–1.4 × 0.5–0.7 mm.

= 16.

= 36.