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Rough Hawthorn (Crataegus scabrida)

Description

Crataegus scabrida Sargent, Rhodora. 3: 29. 1901. Shrubs, 30-50 dm. Stems: twigs: new growth reddish early, glabrous, 1-year old deep tan, 2-years old tan to deep reddish brown, older dull gray; thorns on twigs at 1-year old shiny, dark brown to nearly black, stout or slender, 4-6 cm. Leaves: petiole -slender-, length 40-60% blade, sparsely pubescent or glabrous, eglandular or sessile-glandular; blade short-ovate to ovate, broadly elliptic to narrowly rhombic, or - trullate, 3-8 cm, base rounded to cuneate, lobes 3-5 per side, margins serrate, veins 5-7(or 8) per side, apex acute, abaxial surface glabrous, adaxial sparsely to densely appressed-pubescent young, glabrescent. Inflorescences 6-10-flowered; branches glabrous or villous. Flowers 15-18 mm diam.; hypanthium glabrous or pubescent; sepals narrowly triangular, margins subentire or glandular-serrate; stamens 7 or 8(-10), anthers pink; styles 3 or 4. Pomes reddish or orange-red, suborbicular, 6-9 mm diam., -pruinose-, glabrous or slightly pubescent; sepals spreading to - erose; pyrenes 2-4, sides often pitted. 2n = 51. Varieties 4 (4 in the flora): nc, ne North America. Crataegus scabrida is variable in leaf shape and size, as well as in pubescence of adaxial leaf surfaces and pedicels. The species falls into four reasonably well-marked varieties, only the first two of which are frequent. The range of the species as a whole is somewhat poorly documented because of frequent incorrect identification.

Taxonomic tree

  • Domain: Eukarya

    • Kingdom: Plantae

      • Phylum: Magnoliophyta

        • Class: Magnoliopsida

          • Order: Rosales

            • Family: Rosaceae

              • Genus: Crataegus