Difference between revisions of "Arctanthemum arcticum (Linnaeus) Tzvelev in A. I. Tolmatchew (Q2091)"
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Latest revision as of 12:48, 24 June 2022
Arctanthemum arcticum is a taxon with the rank species within the genus Arctanthemum
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Arctanthemum arcticum (Linnaeus) Tzvelev in A. I. Tolmatchew
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Arctanthemum arcticum is a taxon with the rank species within the genus Arctanthemum
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Statements
taxon/id/Arctanthemum arcticum (Linnaeus) Tzvelev
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Arctanthemum arcticum (Linnaeus) Tzvelev
Arctanthemum arcticum
(Linnaeus) Tzvelev
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 19: Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York.
accepted
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CA-BC
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CA-MB
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CA-NT
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CA-NU
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CA-ON
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CA-QC
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CA-YT
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US-AK
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Perennials, forming tufts of 1–10+ rosettes;
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rhizomes at or below-ground, fleshy, tough, branched;
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taproots (young plants) 3–6 (–10) mm diam.
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Stems glabrous or sparsely woolly proximally to ± densely white-woolly near heads.
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Leaves sometimes glaucous;
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bases cuneate to truncate, sheathing to clasping (distal), margins revolute, teeth obtuse to rounded, sometimes mucronulate, faces glabrous or sparsely woolly, glabrescent;
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basal and proximal cauline blades ± fan-shaped to cuneate or spatulate, 6–50 × 4–35 mm, lobes usually 3–7, apices blunt;
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distal blades linear, 4–35 × 1–28 (–40) mm, bases attenuate, margins crenate, dentate, or entire, apices acute or obtuse;
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faces ± woolly, glabrescent.
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Peduncles usually bracteate, bracts 0–4, linear-lanceolate to linear, 6–19 mm.
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Ray laminae 8–12 mm.
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Disc corollas: tubes greenish yellow, (1.1–) 1.4–2 mm, throats and lobes yellow turning brownish, throats 0.7–1 mm, sometimes very sparsely glandular, lobes (0.25–) 0.4–0.6 mm.
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Cypselae 1.5–2.5 mm. 2n = 18 (72?).
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sparsely woolly
proximally more or less densely white-woolly
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less fan-shaped
cuneate or spatulate
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