Flora of North America species comparison

erect, branched at base and in inflorescence.

erect, unbranched below inflorescence.

opposite near base or alternate throughout, appressed-ascending;

stipular glands present;

blade linear to linear-lanceolate, 8–20 × 0.5–2.1 mm, margins entire or with scattered minute marginal glands, not ciliate, apex acute; 1-nerved.

proximal opposite, distal alternate, ascending;

stipular glands absent;

blade of cauline leaves narrowly elliptic or linear-oblanceolate, 23 × 4 mm, margins entire, not ciliate, apex acute or apiculate.

panicles, with ascending to spreading branches.

panicles.

0–3 mm.

0–2.5 mm.

sepals persistent, lanceolate to ovate, 2.5–5 mm, margins of inner sepals narrowly scarious, conspicuously glandular-toothed, apex acute or acuminate;

petals lemon yellow, oblanceolate or narrowly obcordate, 7–11 mm;

stamens 2–8 mm;

anthers 0.5–1 mm;

staminodia present;

styles distinct, 3–6.5 mm;

stigmas capitate.

sepals persistent, lanceolate or oblanceolate to obovate, 2.8–3.8 mm, inner broader, somewhat shorter than outer, margins not scarious, entire, apex apiculate;

petals yellow, obovate, 8–11 mm;

stamens 6 mm;

anthers 0.8 mm;

staminodia absent;

styles distinct, length unknown;

stigmas capitate.

ovoid, 2–3 × 2–2.5 mm, apex sharp-pointed, dehiscing readily into 10, 1-seeded segments, segments falling freely, false septa incomplete, false and true septa margins ciliate.

ovoid, 3.4–3.9 × 3.2–3.5 mm, apex obtuse, dehiscing freely into 10, 1-seeded segments, segments persistent on plant, falling tardily, false septa nearly complete, proximal margins very sparsely and inconspicuously ciliate.

1.2–1.9 × 0.7–1.1 mm.

2.8–3 × 1.2 mm.

= 36.