Polanisia jamesii

Annuals, 15–40(–60) cm. Stems branched; hairs stalked, glandular throughout. Leaves: petiole green to purple, angled, (0.2–)0.5–0.8(–1) cm; leaflet blade linear to narrowly elliptic, 1.5–2.8 × 0.1–0.2 cm, margins entire, apex acute, mucronulate, surfaces densely glandular abaxially, sparsely glandular adaxially. Racemes 1–3 cm (6–8 cm in fruit); bracts trifoliate, ovate, 5–15 mm. Pedicels 5–15 mm. Flowers: sepals pale yellow, glandular, lanceolate, 1.6–2.6 × 0.8–1.2 mm, margins entire, apex acute to obtuse; petals white, oblong-ovate, clawed, abaxial pair 1.5–3 × 1–2 mm (6 or 7-lobed), apex emarginate to lacerate, adaxial pair 3–5 × 2–3 mm (4 or 5-lobed), apex emarginate to lacerate; nectary glands yellow (drying purple), 0.5–1 mm; stamens 6–9, slightly exserted, yellow, 3.2–5.2 mm; anthers yellow, 0.5–1 mm; gynophore 2–4 mm in fruit; ovary 2.5–5(–7) mm; style persistent in fruit, 2.5–4.5 mm; stigma red. Capsules 8–30 × 2–4 mm, reticulate, glandular. Seeds 18–36, bright reddish brown, globose to oblong, 1.8–2 mm, pebbled (without transverse ridges). 2n = 20.

Phenology: Flowering summer–early fall.
Habitat: Sandy soil, often in blowouts in prairies and stabilized dunes
Elevation: 200-1400 m

Distribution

• Generated Map
• Legacy Map

Colo., Ill., Ind., Iowa, Minn., Nebr., N.Mex., Ohio, Okla., S.Dak., Tex., Wis.

Discussion

Of conservation concern.

Populations of Polanisia jamesii in Indiana and Ohio are adventive.

Selected References

None.

Lower Taxa

None.