Symphyotrichum pilosum (Willdenow) G. L. Nesom (Q2450)
Revision as of 11:36, 23 June 2022 by WikibaseAdmin (talk | contribs) (Changed label, description and/or aliases in en, and other parts)
Symphyotrichum pilosum is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
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| English |
Symphyotrichum pilosum (Willdenow) G. L. Nesom
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Symphyotrichum pilosum is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
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Statements
taxon/id/Symphyotrichum pilosum (Willdenow) G.L. Nesom
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Symphyotrichum pilosum (Willdenow) G.L. Nesom
Symphyotrichum pilosum
(Willdenow) G.L. Nesom
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 20: Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford University Press, New York.
accepted
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Oldfield or frost weed or white oldfield or hairy or hairy white oldfield aster (English)
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CA-BC
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CA-NB
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CA-NS
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CA-ON
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CA-QC
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US-AL
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US-AR
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US-CT
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US-DC
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US-DE
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US-FL
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US-GA
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US-IL
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US-IN
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US-IA
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US-KS
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US-KY
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US-ME
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US-MA
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US-MD
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US-MI
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US-MN
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US-MS
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US-MO
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US-NC
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US-NH
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US-NJ
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US-NY
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US-NE
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US-OH
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US-OK
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US-PA
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US-RI
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US-SC
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US-SD
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US-TN
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US-VA
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US-VT
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US-WV
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US-WI
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with stout, branched caudices, sometimes long-rhizomatous.
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Stems 1–5+, ascending to erect (straight, stout), glabrate to hirsuto-hispid or pilose, sometimes glabrous or hairy in lines (var. pringlei).
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Leaves thin, margins ciliate, apices acute to acuminate, mucronate, faces glabrous or ± hirsute (particularly on abaxial midveins);
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basal withering by flowering (new vernal rosettes developing at flowering), petiolate to subpetiolate (petioles winged, ciliate, bases sheathing), blades oblanceolate or obovate to spatulate, 10–60 × 5–15 mm, bases attenuate, margins sparsely crenate-serrate (mostly apically), apices obtuse to rounded;
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proximal cauline usually deciduous at flowering (often with axillary clusters of small leaves), petiolate or subpetiolate to subsessile (petioles narrowly to broadly winged, clasping), blades elliptic-oblanceolate or oblong to linear-lanceolate or oblanceolate, 40–102 × 5–25 mm, progressively reduced distally, bases attenuate to cuneate, ± clasping, margins entire to serrate, softly ciliate, apices attenuate, hyaline-spinulose;
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distal sessile, blades lance-oblong to linear-lanceolate to linear or linear-oblanceolate or linear-subulate, 10–100 × 1–8 mm, progressively reduced distally, branch leaves abruptly smaller, bases cuneate, margins entire or serrulate.
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Heads in open, leafy, often pyramidal, paniculiform arrays, branches divaricate or branches 10 cm or less ascending, often arched and secund, sometimes racemiform.
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Peduncles 5–30 (–50) mm, progressively shorter distally, glabrous or densely hispid, bracts 7–25+, appressed to ascending, sometimes ± spreading, linear to subulate, glabrate, ciliate or not, mucronate to apiculate, ± grading into phyllaries.
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Involucres campanulate to cylindro-campanulate, (2.5–) 3.5–5.1 (–6.5) mm.
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Phyllaries in 4–6 series, appressed or slightly spreading, oblong-lanceolate (outer) to linear (innermost), unequal (rarely subequal), bases indurate 1/2–3/5, margins hyaline, scarious, erose, ± ciliolate distally, green zones lanceolate to lance-rhombic, apices acute or acuminate, involute, spinulose, faces glabrous or sparsely hirsutulous.
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Ray-florets (10–) 16–28 (–38);
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corollas usually white, rarely pinkish or bluish, laminae (4–) 5.4–7.5 (–11) × (0.4–) 0.8–1.3 (–1.7) mm.
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Disc-florets (13–) 17–39 (–67);
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corollas light yellow becoming reddish purple or brown, (2.5–) 3–4.1 (–5.5) mm, tubes much shorter than narrowly funnelform throats, lobes lanceolate, (0.4–) 0.6–0.8 (–1) mm.
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Cypselae whitish or gray, oblong-obovoid, sometimes ± compressed, 1–1.5 × 0.5–0.7 mm, 4–6-nerved, faces sparsely strigillose;
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pappi white, 3.5–4 mm.
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glabrate
hirsuto-hispid or pilose
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reduced
progressively; distally
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linear-lanceolate or oblanceolate
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lance-oblong
linear-lanceolate
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reduced
progressively; distally
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campanulate
cylindro-campanulate
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light yellow becoming reddish purple or brown
becoming; becoming
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compressed
sometimes more or less
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