Polanisia jamesii

(Torrey & A. Gray) H. H. Iltis

Brittonia 10: 54. 1958.

Common names: James’s clammyweed
EndemicConservation concern
Basionym: Cristatella jamesii Torrey & A. Gray Fl. N. Amer. 1: 124. 1838
Treatment appears in FNA Volume 7. Treatment on page 203. Mentioned on page 201.

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

V7 264-distribution-map.gif

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.
... more about "Polanisia jamesii"
Gordon C. Tucker +
(Torrey & A. Gray) H. H. Iltis +
Cristatella jamesii +
James’s clammyweed +
Colo. +, Ill. +, Ind. +, Iowa +, Minn. +, Nebr. +, N.Mex. +, Ohio +, Okla. +, S.Dak. +, Tex. +  and Wis. +
200-1400 m +
Sandy soil, often in blowouts in prairies and stabilized dunes +
Flowering summer–early fall. +
Endemic +  and Conservation concern +
Cristatella +
Polanisia jamesii +
Polanisia +
species +