Cardamine integra Heenan

Perennial herb, single rosette or with short lateral branches. Leaves up to 70 mm long, usually simple, seldom pinnatifid or pinnatisect; lamina 2.5–19.0 × 2.0–11.0 mm, green, membranous, glabrous on abaxial surface, glabrous or occasionally with hairs on adaxial surface, glabrous or sparsely hairy to glabrescent on margin and petiole; hairs 0.2–0.25 mm long, spreading to patent; petiole up to 50 mm long. Terminal pinna 2.5–19.0 × 2.0–11.0 mm, simple, oblong-elliptic, broadly oblong-elliptic, to oblong-orbicular; margin entire to shallowly crenate, with 2–4 indistinct hydathodes; apex obtuse with a usually indistinct hydathode; base cuneate to occasionally obtuse. Lateral pinnae absent or 1–2, 2.0–5.0 × 1.5–3.2 mm, broadly oblong-elliptic to oblong-orbicular; apex obtuse; base often oblique; sessile or petiolule < 0.5 mm long. Cauline leaves similar to rosette leaves but smaller, narrower, with no lateral pinnae; terminal pinna up to 18.0 × 10.0 mm, oblong-elliptic, narrowly oblong-orbicular. Inflorescence with 1–8 corymbs, each corymb 2–4-flowered or flowers sometimes solitary; peduncle up to 150 mm long, 0.5–1.0 mm diam. at base, spreading to weakly ascending, glabrous. Pedicels 6.0–42.0 mm long, 0.25–0.5 mm diam., glabrous. Sepals 1.8–2.5 × 0.4–1.0 mm, oblong, elliptic-oblong, saccate, green, sparsely hairy, hairs spreading to patent, margin white and membranous, apex obtuse, base truncate. Petals 4.5–6.0 × 1.8–2.0 mm, white, limb obovate; apex obtuse; base attenuate, tapering to a 1.0–1.2 mm long claw. Stamens 6; median filaments 4, 1.6–2.2 mm long; lateral filaments 2, 1.5–1.8 mm long; anthers 0.5–0.6 mm long, cream to pale yellow, when dehiscent held at a similar height to or slightly below the stigma. Ovary 2.5–3.5 mm long, 0.4–0.5 mm diam., ± terete, green, glabrous; ovules 20–34; style c. 0.4–0.5 mm long, ± terete; stigma 0.3–0.4 mm diam. Siliques 9.0–20.0 × 0.9–1.1 mm, glabrous, style 0.5–1.4 mm long; valves green to yellow-green at maturity and when dehiscent; replum 0.3–0.4 mm wide. Seeds 0.8–0.9 mm long, 0.5–0.6 mm wide, 0.25–0.35 mm thick, oblong to broadly oblong, henna-green to henna; wing absent.

Cardamine integra is distinguished from C. corymbosa by the rosette leaves being mostly simple and having a cuneate to occasionally obtuse base, and the cauline leaves being simple and oblong-elliptic to narrowly oblong-orbicular. Cardamine grandiscapa is also found on the limestone bluffs at Rockdale, but it occurs under shaded forest in south-facing gullies. These two species are most easily distinguished by C. integra having rosette and cauline leaves, mostly simple, oblong-elliptic, broadly oblong-elliptic to oblong-orbicular, and with a cuneate to occasionally obtuse base; C. grandiscapa has rosette and cauline leaves, usually pinnatisect, orbicular, orbicular-reniform to orbicular-deltoid, and an obtuse, truncate or cordate base.

Cardamine integra is restricted to limestone habitats, where it occurs on ledges and in crevices on bluffs and rock outcrops.

Flowering September–February; Fruiting October–March.