Iris verna L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Lvs grass-like, bright green, glaucous on one side, 3–4 cm × 3–10 mm at anthesis, later much elongate; spathe 1–2-fld, the valves pale green to whitish or pink-tinged, rather closely sheathing each other; perianth-tube dull green, ± exceeding the spathe-valves, the limb 5–6 cm wide, bright violet (pale or white); sep spreading or recurved; with a broad, yellow, papillose-hairy band extending from the middle of the blade into the claw and frequently surrounded by white markings; pet erect, with long slender claw and obovate blade; fr obtusely 3-angled, slender-beaked, 1.5–2.5 cm; seeds arillate; 2n=42. Sandy open woods and pine-lands. Pa. to Ky., Miss. and Ga. Apr., May. (Neubeckia v.)