Trees & Shrubs 2: 3, plate 102. 1907.
Shrubs or trees, 50–70 dm. Stems: twigs: new growth pubescent, 1-year old light gray-brown, older grayish; thorns on twigs numerous, 1-year old bright chestnut-brown, slender, 4–7 cm. Leaves: petiole length 20% blade, villous early, glabrescent; blade narrowly obovate, 5–6 cm, base narrowly cuneate, lobes 0, margins serrulate, venation camptodromous, veins 4–6 per side, apex acute, abaxial surface veins villous, adaxial soft-white-hairy young, glabrescent. Inflorescences 12–20-flowered; branches puberulent; bracteoles ± persistent, numerous, very narrow, membranous, margins glandular. Flowers 14–15 mm diam.; hypanthium densely villous; sepals narrowly triangular, margins glandular-serrate; stamens 10–15, anthers cream; styles 2 or 3. Pomes yellowish red, suborbicular, 9–10 mm diam., punctate, glabrous; sepals narrow, ± reflexed; pyrenes 2, dorsally grooved, sides plane.
Phenology: Flowering May; fruiting Sep–Oct.
Habitat: Gravelly stream beds
Elevation: 150–200 m
Ark., Ind., Mo.
Crataegus ×incaedua is similar to C. collina var. sordida except for the cream anthers and two or three styles and pyrenes; it probably is a hybrid of C. collina with C. calpodendron, according to E. J. Palmer (1952).