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

64a.4. Crataegus Linnaeus (sect. Crataegus) ser. Microcarpae (Loudon) Rehder, Man. Cult. Trees ed. 2. 367. 1940.

Crataegus sect. Microcarpae Loudon, Arbor. Frutic. Brit. 2: 825. 1838

Shrubs or trees, 30–70 dm. Stems: trunk bark cream to cinnamon brown or light gray-brown in patches, in shade darker patches pale tan or olive green, exfoliating with smooth, thin flakes; compound thorns on trunks sometimes present; thorns on twigs determinate. Leaves ˂long-persistent˃: petiole length 5–30% blade; blade narrowly or broadly spatulate, ˂narrow, 1.5–3 cm, coriaceous˃, lobes 0 or 1 per side, sinuses ± shallow to deep, venation craspedodromous, veins to lobes and deeper sinuses; ˂blades on extension shoots usually more diverse in shape, larger, more deeply incised˃. Inflorescences 20–30-flowered; branches glabrous; bracteoles ± caducous, linear, small, membranous to herbaceous, margins usually eglandular, sometimes ± stipuliform. Flowers 10 mm diam.; sepals triangular; stamens 20, anthers pale yellow; styles 3–5. Pomes bright orange-red, orbicular, 3–5 mm diam., ˂matte to glossy˃; sepal remnants persistent; pyrenes 3–5, dorsally obscurely grooved, sides plane ˂apical quarters exposed˃.

Species 1: sc, se United States.


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