Arethusa divaricata Linnaeus, Sp. Pl. 2: 951. 1753; Pogonia divaricata (Linnaeus) R. Brown

Plants (15–)31–76 cm (in flower). Leaves: blades on flowering stems, 33–150 × 5–23 mm. Flowers: sepals 31–65 × 3–5.5 mm; petals 27–53 × 5–19 mm; lip (26–)34–55 × 18–24 mm, central keel relatively thin or evidently thin-winged, 3–4 mm wide, deeply and broadly grooved, groove 1.5 mm deep, smooth with 1–3 low, continuous ridges; column 21–25(–29)mm. Capsules (35–)40–65(–80) × 5–10 mm. 2n = 18.

Flowering May (Fla.)--Jul (Del.). Coastal Plain savannas, in acidic soil; 0--200 m; Del., Fla., Ga., Md., N.J., N.C., S.C., Va.