Symphyotrichum firmum (Nees) G. L. Nesom (Q2421)
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Symphyotrichum firmum is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
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Symphyotrichum firmum (Nees) G. L. Nesom
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Symphyotrichum firmum is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
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Statements
taxon/id/Symphyotrichum firmum (Nees) G.L. Nesom
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Symphyotrichum firmum (Nees) G.L. Nesom
Symphyotrichum firmum
(Nees) 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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CA-AB
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CA-MB
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Manitoba Checklist, 2002
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-QC
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CA-SK
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Harms, V.L. 2006. Annotated catalogue of Saskatchewan vascular plants. http://www.biodiversity.sk.ca/Docs/AnnotatedCatalogueSKVascPlants2006.pdf
CA-AB
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CA-MB
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CA-ON
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CA-SK
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US-GA
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US-IA
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US-MI
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US-MN
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US-MO
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US-NE
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100–400 m
100 meter
400 meter
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Stems 1, erect (straight, ± thin, 2–8 mm diam at base, ± ribbed, red above each node), glabrous or glabrate (very sparsely hispidulous) proximally to ± hispidulous distally.
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Leaves (crowded, light green, shiny) firm, margins crenulate-serrate or entire, revolute, apices acute to acuminate, mucronate, abaxial faces glabrous or midveins sometimes with hairs apically, adaxial glabrous;
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basal withering by flowering, subpetiolate (petioles dilated, winged, sheathing), blades spatulate to oblanceolate, 30–100+ × 3–20+ mm, bases attenuate to cuneate, margins remotely crenate-serrate to subentire, apices acute to rounded;
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proximal cauline withering by flowering, sessile or subpetiolate (petioles widely winged, clasping), blades oblanceolate, 50–150 × 20–30 mm, greatly reduced distally, bases auriculate, clasping, apices acute to acuminate;
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distal sessile, blades lanceolate to lance-elliptic to oblanceolate, 40–70 × 10–25 mm, little reduced distally, bases auriculate, clasping, margins entire, apices acute to acuminate.
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Heads in densely paniculiform arrays, branches ascending, densely leafy (branch leaves often overtopping heads).
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Peduncles 0.2–3+ cm, glabrous or pilose in lines, bracts 4–6, lanceolate-linear, often subtending heads.
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Involucres campanulate, 6–12 mm.
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Phyllaries in 4–5 (–6) series, linear-lanceolate to linear, slightly unequal, bases indurate 1/5–1/2, margins not scarious (outer) to narrowly scarious, erose, hyaline, sparsely ciliolate, green zones linear-lanceolate, outer sometimes ± foliaceous, apices acute to acuminate or long-acuminate to caudate, faces glabrous.
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Ray-florets 20–40;
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corollas usually blue to pale lavender, sometimes white, laminae 9–18 × 1.0–1.2 mm.
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Disc-florets 30–50;
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corollas yellow or cream becoming pink or purple, (4.5–) 5–6.4 mm, tubes shorter than funnelform throats, lobes triangular to lanceolate, 0.6–0.9 mm.
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Cypselae purple or brown, obovoid, oblong or oblanceolate, ± falcate, ± compressed, 1.5–3 mm, 3–4-nerved, faces glabrous or sparsely strigillose;
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pappi white, 5.2–8 mm. 2n = 16.
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glabrate
proximally more or less hispidulous
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remotely crenate-serrate
subentire
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remotely crenate-serrate
subentire
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remotely crenate-serrate
subentire
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cream becoming pink or purple
becoming; becoming
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