Difference between revisions of "Symphyotrichum urophyllum (Lindley ex de Candolle) G. L. Nesom (Q2429)"

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morphology statement value to: brown or dull purple
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Latest revision as of 12:49, 24 June 2022

Symphyotrichum urophyllum is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
Language Label Description Also known as
English
Symphyotrichum urophyllum (Lindley ex de Candolle) G. L. Nesom
Symphyotrichum urophyllum is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum

    Statements

    taxon/id/Symphyotrichum urophyllum (Lindley ex de Candolle) G.L. Nesom
    0 references
    Symphyotrichum urophyllum (Lindley ex de Candolle) G.L. Nesom
    Symphyotrichum urophyllum
    (Lindley ex de Candolle) 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
    Symphyotrichum urophyllum
    (Lindley ex de Candolle) G.L. Nesom
    aster urophylle (French)
    arrow-leaved aster (English)
    white arrow-leaved aster (English)
    white arrow aster (English)
    White arrowleaf or arrowleaf aster (English)
    1 reference
    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.
    Flowering Aug–Oct.
    rocky soils
    limestone pavements
    glades
    ravines
    open oak
    sassafras
    pine woods
    moist or dry
    rocky bluffs
    savanna
    wooded banks
    fields
    roadsides
    hedgerows
    railroads
    short-rhizomatous or with stout, branched caudices.
    Stems 1–5+, erect (straight to slightly flexuous, brittle, sometimes stout), proximally glabrous or glabrate, distally sparsely pilose.
    Leaves thin, margins usually shallowly, sometimes deeply serrate, rarely entire (distal), (piloso to strigoso-) ciliate to scabrous (distal), apices mucronate, abaxial faces moderately pilose, ± densely so on midveins, adaxial glabrate to sparsely pilose or scabrous;
    basal usually withering by flowering, sometimes persistent, long-petiolate (5–15 cm, petioles not or narrowly winged, sheathing), blades ovate to lanceovate or lanceolate, 25–120 × 15–50 mm, bases usually shallowly, sometimes deeply, cordate to truncate or rounded, apices acute, sometimes rounded;
    proximal cauline sometimes deciduous at flowering, winged-petiolate (petioles distally usually broader-winged, clasping), blades ovate to lanceolate, 50–120 × 20–50 mm, gradually reduced distally, bases usually truncate or rounded to attenuate, sometimes cordate, apices usually acute or acuminate, sometimes nearly caudate;
    distal ± shortly winged-petiolate or sessile, blades lanceovate or lanceolate to linear-lanceolate, 10–100 × 1–25 mm, reduced distally, bases attenuate to cuneate, margins entire to subentire, scabrous, apices acuminate to subcaudate.
    Heads (crowded) in dense, elongate, paniculiform arrays, branches stiffly ascending to erect (sometimes arched when long, peduncles then often secund), usually racemiform, sometimes paniculiform, leafy.
    Peduncles 0.3–2 cm, sparsely pilosulous to glabrate, bracts many, ascending, linear to subulate, 2–4 mm, grading into phyllaries.
    Involucres cylindric, (4–) 4.5–6 (–7) mm.
    Phyllaries in 4–6 series, appressed or recurved-spreading, subulate (outer) to linear-lanceolate (inner), unequal, bases indurate 1/3–1/2+, margins scarious, hyaline, erose, sparsely ciliolate (mostly distally), green zones linear-lanceolate (outer) to linear (inner), apices long-acuminate to caudate, recurved, hyaline-mucronate to aristate, tips often purple, faces glabrous.
    Ray-florets 8–15 (–20);
    corollas mostly white to pale-pink or lilac or light blue, laminae 4.5–8 (–10) × 0.8–1.5 mm.
    Disc-florets (8–) 10–15 (–20);
    corollas whitish to cream becoming pink, (3.5–) 4–5 mm, tubes shorter than funnelform throats (with hairs), lobes lanceolate, 0.4–0.7 mm.
    Cypselae tan to brown or dull purple (nerves stramineous), obovoid, ± compressed, 1.8–2.5 mm, 4–6-nerved, faces glabrous or glabrate or very sparsely strigillose;
    pappi white or rose-tinged, 3–4 mm. 2n = 16.