Pinedrops, ptérospore andromeda

Inflorescences 1.5-17 dm , glandular-hirsute; bracts 2-3.5 × 0.5-1 cm, scarious at maturity. Flowers: sepals 4-6 × 2-3 mm; corolla 6-9 mm, base not saccate, lobes reflexed, rounded to blunt; stamens 3-5 mm; anthers horizontal at anthesis, ca. 1 mm diam., awns to 1.5 mm; ovary 3-4 × 4-6 mm, glabrous; style 1-3 × 1 mm; stigma yellowish, ca. 1.5 mm diam. Capsules persistent, thin-segmented, remaining connate at apex, 5-10 × 7-14 mm. Seeds 0.2-0.5 mm including wing. 2n = 16, 48.

Flowering summer. Moist to dry, often deep humus of mixed-deciduous or coniferous forests (sometimes on calcareous substrates); 60-3700 m; Alta., B.C., N.B., Ont., P.E.I., Que., Sask.; Alaska, Ariz., Calif., Colo., Idaho, Mich., Mont., Nebr., Nev., N.H., N.Mex., N.Y., Oreg., S.Dak., Tex., Utah, Vt., Wash., Wyo.; Mexico (Chihuahua, Durango, Nuevo León).