Leavenworthia uniflora

Stems (when present) 1–2 dm. Basal leaves: petiole 0.3–2.6 cm; blade 2.3–8.5(–10) cm, lobes 3–10 on each side, margins coarsely dentate, terminal lobe suborbicular, 0.3–0.6 cm × 5–7 mm (slightly shorter than wide), slightly larger than lateral lobes, margins coarsely dentate. Fruiting pedicels: solitary flowers 30–120 mm; racemes to 40 mm. Flowers: sepals widely spreading, oblong, 2.5–4.5 × 0.9–1.5 mm; petals often erect, white, oblanceolate, 3.7–6.4 × 1–2(–2.5) mm, claw white or pale yellow, 1.3–2.5 mm, apex obtuse or truncate; filaments: median 2.5–4.2 mm, lateral 1.6–2.6 mm; anthers 0.5–0.8(–1) mm. Fruits narrowly oblong, (1.5–)2–3 cm × 3–4(–5) mm, smooth, latiseptate; valves thin; ovules 18–26 per ovary; style 0.9–2(–2.5) mm. Seeds 2.3–3.5 mm diam.; wing 0.2–0.4 mm wide; embryo slightly accumbent. 2n = 30.

Phenology: Flowering Mar–Apr.
Habitat: Rocky ledges, cedar glades, pastures, roadsides, old fields, thin soil on limestone beds, seeps on limestone rubble
Elevation: 100-500 m

Ala., Ark., Ga., Ind., Ky., Mo., Ohio, Tenn.

Discussion

Leavenworthia michauxii Torrey, which pertains here, is an illegitimate name based on Cardamine uniflora Michaux.

Selected References

None.

Lower Taxa