Difference between revisions of "Crataegus sect. Douglasia Loudon (Q4362)"
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Latest revision as of 13:35, 24 June 2022
Crataegus sect. Douglasia is a taxon with the rank section within the genus Crataegus
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Crataegus sect. Douglasia Loudon
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Crataegus sect. Douglasia is a taxon with the rank section within the genus Crataegus
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Statements
taxon/id/Crataegus sect. Douglasia Loudon
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Crataegus sect. Douglasia Loudon
Crataegus sect. Douglasia
Loudon
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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Shrubs or trees, (20–) 30–100 (–140) dm.
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Stems: trunks 1–few, usually ± erect, bark plated, ± exfoliating;
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compound thorns on trunks sometimes present;
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thorns on twigs determinate, usually numerous, straight to ± recurved, slender to stout.
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Leaves: blade ± rhombic to ± elliptic, elliptic-oblong, or ovate-rhombic, sometimes ± obovate, oblanceolate, or suborbiculate, 3–8 cm, ± coriaceous to ± thin, lobes 0 or 1–4 per side, obscure to evident and sinuses shallow to deep, veins (3 or) 4–9 (–12) per side, absent to sinuses.
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Inflorescences: branches glabrous or pubescent;
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symmetric bracteoles present, basal stipuliform, falcate bracteoles absent.
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Flowers: post-mature petals pale paper brown;
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stamens 5 or 10–20, anthers white to ivory, pink, or purple, sometimes puce.
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Pomes bright or deep red to purple or black (late Aug), reddish purple to black (late Sep);
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less rhombic
more or less elliptic elliptic-oblong or ovate-rhombic
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less rhombic
more or less elliptic elliptic-oblong or ovate-rhombic
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less rhombic
more or less elliptic elliptic-oblong or ovate-rhombic
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obovate
sometimes more or less
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purple or black reddish purple
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purple or black reddish purple
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