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FNA | Family List | FNA Vol. 9 | Rosaceae | Crataegus

159. Crataegus ×dispessa Ashe, J. Elisha Mitchell Sci. Soc. 19: 17. 1903.
[as species]

Crataegus pyriformis Britton, Bull. New York Bot. Gard. 1: 449. 1900, not Jacques 1858; C. treleasei Sargent

Trees, 55 dm. Stems: twigs: new growth canescent, 1-year old dark brown, older gray; thorns on twigs absent or few, straight or slightly curved, 1-year old dark purple, 3 cm. Leaves deciduous; petiole slender, length 33–43% blade, distally winged, densely pubescent, eglandular; blade elliptic to suborbiculate, 3–7 cm, base cuneate, lobes 0 or 1–3 per side, apiculi, margins sharply serrate, venation craspedodromous, veins 5 per side, sharply impressed, apex acute, surfaces glabrate, glabrescent, abaxial veins densely pubescent, adaxial appressed-pubescent young. Inflorescences 10–20-flowered; branches tomentose; bracteoles caducous, numerous, linear, ± membranous, margins glandular. Flowers 20–25 mm diam.; hypanthium canescent; sepals narrowly triangular, margins glandular-serrate to glandular-laciniate, abaxial surface densely pubescent; stamens 20, anthers cream, sometimes pink; styles 4 or 5. Pomes crimson, suborbicular, 12–17 mm diam., pubescent; sepals erose or patent; pyrenes 4 or 5, dorsally grooved, sides plane.

Flowering May; fruiting Sep–Oct. Brush, along streams and woodland margins; 100–200 m; Mo.

Crataegus ×dispessa is found in southern Missouri to Boone County and was last collected in Dallas County.

Crataegus ×dispessa is probably of ser. Molles × C. collina var. hirtiflora parentage, the bracteole type not being characteristic of ser. Molles.


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