Crataegus uniflora Münchh.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Shrub 1–2 m with slender, spreading branches; twigs villous when young; lvs obovate, 1.5–3 × 0.8–2 cm, or larger and sometimes broadly elliptic or suborbicular on vegetative shoots, cuneate and often glandular at base, crenate or serrate, firm, scabrate and shining above, pubescent at least on the veins beneath; petiole stout, 2–5 mm, pubescent; fls 1–1.6 cm wide, solitary or rarely 2 together on short-pubescent pedicels; sep foliaceous, pectinate or deeply glandular-serrate; fr 0.8–1.2 cm thick, greenish-yellow or dull red, with a broad, slightly elevated cal and thin hard flesh; nutlets usually 5. Usually in sandy or rocky ground; L.I. and Pa. to Fla., w. to O., Mo., and e. Tex.