Atlantic J. 1: 120. 1832.
Plants 2–5 dm; rhizomes thin, spreading. Cauline leaves 2–4; blade dark glossy green adaxially, oblong to elliptic obovate, 15–30 × 5–10 cm. Inflorescences in short, terminal racemes, 3–8 (–10) -flowered; bracts 1 (–3), narrowly foliaceous. Flowers nodding; tepals yellow to yellowish green, narrowly oblong, 12–16 × 3.5–4.5 mm; filaments 12–17.5 mm; anthers oblong, 2–3.5 mm. Berries ultramarine blue, ovoid, 8–16-seeded, 8–12 mm. Seeds 3–5 mm. 2n = 28, 32.
Phenology: Flowering early May–early Jul.
Habitat: Rich coniferous, mixed, or deciduous woods
Elevation: 0–1600 m
St. Pierre and Miquélon, Man., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Conn., Ga., Ill., Ind., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Tenn., Vt., Va., W.Va., Wis.
Throughout the range of Clintonia borealis a stabilized, 2n = 32 cytotype has been reported (F. H. Utech and L. B. Thien 1973; B. M. Kapoor 1973).
"thin" is not a number."thicker" is not a number.