Symphyotrichum sericeum (Ventenat) G. L. Nesom (Q2503)
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Symphyotrichum sericeum is a taxon with the rank species within the subgenus Symphyotrichum subg. Virgulus
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Symphyotrichum sericeum (Ventenat) G. L. Nesom
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Symphyotrichum sericeum is a taxon with the rank species within the subgenus Symphyotrichum subg. Virgulus
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Statements
taxon/id/Symphyotrichum sericeum (Ventenat) G.L. Nesom
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Symphyotrichum sericeum (Ventenat) G.L. Nesom
Symphyotrichum sericeum
(Ventenat) 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-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-MB
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CA-ON
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US-AR
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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-MI
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US-MN
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US-MO
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US-NE
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US-ND
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US-OH
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US-OK
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US-SD
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US-TN
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US-TX
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US-WI
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100–500+ m
100 meter
500 meter
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with short, woody, cormoid caudices, or short rhizomes.
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Stems 1–5+, ascending to erect (thin, grayish brown to dark-brown), glabrous proximally, densely canescent distally.
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Leaves (silvery) firm, soft;
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basal withering by flowering, sessile, blades (1–3 nerved) elliptic-lanceolate, 10–40 × 5–15 mm, bases cuneate, weakly sheathing, margins usually entire, rarely remotely serrate, piloso-ciliate, apices acute, faces less copiously hairy than cauline;
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proximal cauline withering by flowering, sessile, blades oblanceolate or oblong to linear-lanceolate, 15–30 (–50) × 4–10 mm, slightly and progressively reduced distally, bases rounded, subclasping, margins entire, silky-pilose, apices obtuse to acute, mucronulate, faces sparsely to densely silky-pilose;
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distal sessile, blades lanceolate, 10–30 × 5–8 mm, little reduced distally, bases cuneate, margins entire, apices acute, mucronate, faces ± densely silky.
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Heads in open, paniculiform arrays, branches sparse, fastigiate, often arching (1–5+ per branch).
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Peduncles subsessile or 0.5–3 (–5) cm, densely sericeo-strigose, bracts crowded, 4–8 (–10) mm, grading into phyllaries.
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Involucres campanulate to cylindric, (5–) 7.5–10 mm.
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Phyllaries in 3–5 (–6) series, outer ovate with expanded distal portion [(4–) 5–6 mm], mid ovatelanceolate [6–8 (–10) mm] with expanded green portions, inner linear, unequal or sometimes subequal, outer often foliaceous, bases (mid) scarious, margins silky, green zones restricted to expanded distal 1/2–2/3 (obscured by hairs), apices (outer) spreading or squarrose to reflexed, acute, mucronulate, faces densely long-silky.
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Ray-florets (10–) 15–30;
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corollas usually rose-purple to deep purple, rarely white, laminae 8.5–11 × 1–1.5 mm.
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Disc-florets (15–) 25–35;
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corollas pink turning purple, (5–) 5.5–7 mm, tubes shorter than narrowly funnelform throats (both thinly puberulent), lobes deltate, 0.7–0.9 mm.
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Cypselae purple or brown, obovoid, not compressed, 2–3 mm, 7–10-nerved (prominent), faces glabrous;
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pappi whitish or tawny, 6–7 mm. 2n = 10, 20.
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silky-pilose
sparsely to densely
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