Draba paysonii J. F. Macbride (Q3540)
Draba paysonii is a taxon with the rank species within the genus Draba
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Draba paysonii J. F. Macbride
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Draba paysonii is a taxon with the rank species within the genus Draba
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taxon/id/Draba paysonii J.F. Macbride
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Draba paysonii J.F. Macbride
Draba paysonii
J.F. Macbride
FNA Editorial Committee. 2010. Flora of North America north of Mexico. Volume 7: Magnoliophyta: Salicaceae to Brassicaceae. Oxford University Press, New York.
accepted
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CA-AB
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Al-Shebaz, I.A. & G.A. Mulligan. 2013. New or noteworthy species of Draba (Brassicaceae) from Canada and Alaska. Harvard Papers in Botany 18: 101-124.y
US-MT
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US-WY
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1800-3500 m
1,800 meter
3,500 meter
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Stems unbranched, 0.05–0.3 dm, densely pubescent throughout, trichomes simple, 0.4–1.3 mm, and stalked, 2–5-rayed, stellate, 0.1–0.6 mm.
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blade linear to linear-oblanceolate, 0.4–1.2 cm × 0.8–1.5 mm, margins entire, (ciliate, trichomes simple and spurred, (0.4–) 0.6–1.4 mm), surfaces pubescent, abaxially (dense) with stalked, 2–12-rayed trichomes, 0.1–0.8 mm, adaxially with simple and 2-rayed ones, 0.3–1 mm, (midvein prominent).
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Racemes 2–7-flowered, ebracteate, slightly elongated in fruit;
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Fruiting pedicels divaricate-ascending, straight, 3–9 mm, pubescent, trichomes simple (0.4–1.4 mm), and stalked, 2–5-rayed (0.1–0.6 mm).
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Flowers: sepals oblong, 2.8–3.5 mm, pubescent, (trichomes simple and short-stalked, 2–4-rayed);
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petals pale-yellow, oblanceolate to spatulate, (4–) 5–6 × (1.5–) 2–3 mm;
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anthers oblong, 0.5–0.7 mm.
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Fruits often broadly ovoid to lanceolate, plane, slightly inflated basally, (5–) 6–9 × (3–) 3.7–5 mm;
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valves densely pubescent, trichomes simple and 2-rayed, (0.2–) 0.4–1 mm, (occasionally with fewer, smaller, 4-rayed or 5-rayed ones);
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ovules 8–12 per ovary;
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style (0.6–) 0.8–1.2 mm.
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Seeds oblong, 1.7–2.2 × 1–1.4 mm.
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pubescent
densely; throughout
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often broadly ovoid
lanceolate
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