Crataegus formosa Sargent (Q4308)
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Crataegus formosa is a taxon with the rank species within the series Crataegus ser. Pruinosae
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English |
Crataegus formosa Sargent
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Crataegus formosa is a taxon with the rank species within the series Crataegus ser. Pruinosae
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Statements
taxon/id/Crataegus formosa Sargent
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Crataegus formosa Sargent
Crataegus formosa
Sargent
FNA Editorial Committee. 2014. Flora of North America north of Mexico. Volume 9: Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York.
accepted
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CA-ON
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Newmaster, S.G., A. Lehela, M.J. Oldham, P.W.C. Uhlig & S. McMurray. 1998. Ontario Plant List. Ontario Forest Research Institute, Sault Ste. Marie, Ontario. Forest Information Paper No. 123. 550 pp.
CA-ON
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US-NY
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100–300 m
100 meter
300 meter
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Shrubs or trees, 50 dm.
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thorns on twigs recurved, 2-years old dark-brown, shiny, older charcoal black, then gray, ± slender, 2.5–5 cm.
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Leaves: petiole length 30–36% blade, eglandular or slightly glandular;
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blade deltate (mainly on shoots with terminal inflorescence) to broadly rhombic-elliptic, 4–7 cm, subcoriaceous, base cuneate to nearly truncate, lobes 3 or 4 per side (larger leaves), sinuses moderately deep, lobe apex acute, margins serrate, veins 5 or 6 per side, apex acute, surfaces glabrous.
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Inflorescences 4–7-flowered;
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branches glabrous;
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bracteoles caducous, absent or several, margins glandular.
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Flowers 22–30 mm diam.;
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sepals triangular, 6 mm, margins subentire, abaxially glabrous;
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stamens 20, anthers white, 0.6–0.8 mm;
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Pomes red, often ± angular, 10 mm diam., ± pruinose;
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sepals on collar, spreading;
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deltate
broadly rhombic-elliptic
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