Flora of North America species comparison

erect, branches 1–several from base, unbranched proximal to inflorescence.

erect, usually unbranched below inflorescence, sometimes branched at base.

proximal 4–10 pairs opposite, distal alternate, erect to spreading;

stipular glands absent;

blade of proximal leaves spatulate, central and distal elliptic, oblanceolate, or obovate, 15–25 × 3–7 mm, margins entire, not ciliate, apex acute to apiculate.

alternate, spreading;

stipular glands present or absent;

blade linear, 15–30 × 0.6–1.4 mm, margins entire or distalmost glandular-toothed, not ciliate, apex long-attenuate.

corymbs.

ascending or spreading cymes.

1–10 mm.

4.5–9 mm.

sepals persistent, lanceolate-ovate, inner shorter, broader, thinner than outer, outer sepals 2–4 mm, margins not scarious, inner sepals usually with a few small, sessile glands along margin distal to middle, rarely eglandular, outer ones entire, apex acute to acuminate;

petals yellow, obovate (sometimes notched at apex), 3–5.5 mm;

stamens 1.2–3 mm;

anthers 0.5–1 mm;

staminodia absent;

styles distinct, 1–2 mm;

stigmas capitate.

sepals deciduous, lanceolate, inner sepals slightly shorter than outer, outer ones 4.5–7 mm, margins of inner sepals narrowly scarious, all glandular-toothed, apex short-awned;

petals orange-yellow, broadly obovate, 10–17 mm;

stamens 4.5–7 mm;

anthers 0.8–2.3 mm;

staminodia absent;

styles connate nearly to apex, 4–6 mm;

stigmas capitate.

globose, carpels flattened or ± concave abaxially, 1.3–1.8 × 2–2.5 mm, apex depressed, dehiscing freely into 10, 1-seeded segments, segments falling freely, false septa nearly complete, proximal margins usually sparsely and inconspicuously few-ciliate.

ovoid, 4–5 × 3.4–3.7 mm, thick textured, apex obtuse, dehiscing into 5, 2-seeded segments, segments persistent on plant, false septa complete, proximal part membranaceous, not terminating in loose fringe, distal part cartilaginous, margins ciliate.

1–1.5 × 0.6–0.9 mm.

2.3–2.8 × 1–1.3 mm.

= 36.

= 60.