Symphyotrichum racemosum (Elliott) G. L. Nesom (Q2424)
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Symphyotrichum racemosum is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
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Symphyotrichum racemosum (Elliott) G. L. Nesom
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Symphyotrichum racemosum is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
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Statements
taxon/id/Symphyotrichum racemosum (Elliott) G.L. Nesom
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Symphyotrichum racemosum (Elliott) G.L. Nesom
Symphyotrichum racemosum
(Elliott) 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-ON
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Herbier Marie-Victorin (MT). Université de Montréal, Montréal, QC. Specimen. http://www.biodiversite.umontreal.ca/herbier-marie-victorin?lang=en
CA-QC
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Herbier Marie-Victorin (MT). Université de Montréal, Montréal, QC. Specimen. http://www.biodiversite.umontreal.ca/herbier-marie-victorin?lang=en
CA-NB
present
introduced
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Hinds, H.R. 2000. Flora of New Brunswick : a manual for the identification of the vascular plants of New Brunswick. 2nd edition. Biology Department, University of New Brunswick, Fredericton. 699 pp.
CA-NB
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CA-ON
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US-AL
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US-AR
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US-CT
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US-DE
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US-DC
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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-KY
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US-LA
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US-ME
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US-MD
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US-MA
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US-MO
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US-NJ
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US-NY
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US-NC
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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-TN
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US-TX
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US-VT
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long-rhizomatous or with woody caudices.
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Stems 1–3+, erect (straight), glabrous or glabrate.
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Leaves thin, margins often ± revolute, scabrous, apices mucronate to mucronulate, faces glabrous or abaxial minutely pilosulous, cauline with clusters of smaller leaves in most axils;
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basal withering by flowering (new vernal rosettes often present), petiolate (petioles narrowly winged, sheathing, strigoso-ciliate), blades spatulate to oblanceolate, 5–40 × 5–15 mm, bases attenuate or cuneate to rounded, margins crenate-serrate, apices obtuse to acuminate;
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proximal cauline withering by flowering, petiolate or subpetiolate (proximalmost) or sessile (petioles winged, sparsely long strigoso-ciliate), blades elliptic or elliptic-lanceolate to lanceolate or linear-lanceolate, 20–70 × 3–20 mm, progressively reduced distally, bases clasping, margins becoming short-ciliate distally;
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distal (ascending or spreading) usually sessile, sometimes subpetiolate, blades linear-lanceolate to linear, 5–60+ × 1–8 mm, notably unequal in size, reduced distally, abruptly so on branches, bases cuneate to attenuate, margins serrulate or entire.
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Heads in diffuse, ± pyramidal, paniculiform arrays, branches ± lax, spreading horizontally or arching, racemiform, subtended by patent to reflexed branch leaves, often crowded but not (or barely) secund.
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Peduncles slender, 0.2–3+ cm or subsessile, hairy in lines, bracts 5–15, linear-elliptic to acicular, 1–2 mm, glabrous, grading into phyllaries.
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Involucres cylindric, (2.5–) 3.5–4.5 (–5.5) mm.
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Phyllaries in 4–6 series, appressed or outer ± spreading, oblong-lanceolate to linear (innermost), unequal, bases indurate 1/4–1/2, margins narrowly scarious, hyaline, ciliolate, green zones oblanceolate to linear-oblanceolate, apices acute to acuminate, mucronate, sometimes lightly purple-tinged, faces glabrous.
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Ray-florets (12–) 16–20;
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corollas usually white, rarely pink, laminae 5–8 × 0.5–1.2 mm.
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Disc-florets 10–20 (–25);
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corollas cream or pale-yellow becoming pink or red, (2.5–) 3–4.5 mm, tubes shorter than narrowly funnelform throats, lobes recurved to erect, lanceolate, 0.5–1 mm.
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Cypselae gray to tan, obovoid, ± compressed, 1–1.8 mm, 4–5-nerved (faint), faces sparsely strigillose or sericeus;
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pappi white, 2.5–3.5 mm. 2n = 16.
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reduced
progressively; distally
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elliptic-lanceolate
lanceolate or linear-lanceolate
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pale-yellow becoming pink or red
becoming; becoming
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