Flora of North America species comparison

erect, branched at base and in inflorescence.

erect to ascending, unbranched proximally, few to many branched distal to middle.

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 0–13 pairs opposite (often fallen at anthesis), distal alternate, appressed-ascending;

stipular glands usually present, very rarely absent;

blade of proximal leaves oblanceolate or spatulate, of distal ones linear, 7–30 × 1–3 mm, margins entire, not ciliate, apex acute to subulate;

midrib prominent, marginal nerves less conspicuous.

panicles, with ascending to spreading branches.

racemelike;

bracts glandular-toothed, not ciliate.

0–3 mm.

1.3–4.7 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, outer sepals oblong, 2.3–3.7 mm, margins not scarious, all very coarsely, irregularly glandular-toothed (inner sepals more closely and finely toothed than outer), apex acute;

petals pale yellow, obovate, 5–10 mm;

stamen length unknown;

anthers 0.3–0.7 mm;

staminodia absent;

styles connate 0.2–1.8 mm at base, 2–4.5 mm;

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, 2.5–3.3 × 2.1–3 mm, apex rounded to acute, dehiscing freely into 10, sharp-pointed, 1-seeded segments, segments persistent on plant, false septa incomplete, margins prominently ciliate.

1.2–1.9 × 0.7–1.1 mm.

1.6–2.1 × 0.8–1.1 mm.

= 36.

= 30.