Difference between revisions of "Symphyotrichum Nees (Q2413)"
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Latest revision as of 12:49, 24 June 2022
Symphyotrichum is a taxon with the rank genus within the tribe Astereae
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Symphyotrichum Nees
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Symphyotrichum is a taxon with the rank genus within the tribe Astereae
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taxon/id/Symphyotrichum Nees
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Symphyotrichum Nees
Symphyotrichum
Nees
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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Stems ascending to erect, rarely vinelike, usually simple, sometimes branched distally, seldom proximally, usually hairy in decurrent lines at least distally, proximally often glabrous, sometimes hairy, sometimes stipitate-glandular distally.
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petiolate (often basal and proximal, sometimes distal, petioles often ± winged, clasping, ciliate) or sessile;
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blades (often purplish abaxially, 1, sometimes to 3-nerved) cordate to elliptic, oblanceolate, or spatulate (basal), ovate, elliptic, lanceolate, oblanceolate, or linear (cauline, usually progressively, sometimes abruptly or little reduced distally), margins serrate, crenate, or entire, scabrous or ciliate, faces glabrous or hairy, sometimes stipitate-glandular.
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Heads radiate or disciform (sect. Conyzopsis), usually in paniculiform, sometimes in racemiform or subcorymbiform arrays, sometimes borne singly.
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Involucres cylindric or campanulate to hemispheric, 4–22 mm diam.
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Phyllaries 20–84 in (3–) 4–6 (–9) series, 1 (–3) -nerved (not keeled), oblong-lanceolate or oblanceolate or spatulate (outer and mid) to linear (innermost), unequal to subequal, outer sometimes foliaceous, bases usually indurate, margins usually scarious, erose, hyaline or not, (apices usually with a well-defined green zone, sometimes ± foliaceous), faces glabrous or hairy, sometimes stipitate-glandular.
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Receptacles flat to slightly convex, pitted, epaleate.
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usually in 1 series, in 2–5 series, rarely in 4–5+ series in S. frondosum, pistillate, fertile;
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corollas white, pink, blue, or purple (rays 0, peripheral pistillate florets in 2–5+ series, corollas lacking laminae in sect. Conyzopsis).
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Disc-florets (7–) 15–50 (–110), bisexual, fertile;
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corollas yellow to white, becoming purplish to reddish or pinkish at maturity, ± ampliate, tubes usually shorter than funnelform (cylindric in sect. Conyzopsis) throats, lobes 5, erect, spreading, or reflexed, deltate, triangular, or lanceolate;
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style-branch appendages lanceolate.
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Cypselae usually obovoid or obconic, sometimes fusiform, ± compressed, nerves (2–) 3–5 (–10, sometimes dark-translucent), faces glabrous or strigillose, eglandular (sparsely stipitate-glandular in S. novae-angliae);
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pappi persistent, of (20–) 25–40 (–55) white to brownish, ± equal, barbellate, apically attenuate bristles in 1 (–3) series.
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x = 8, 7, 5, 13, 18, 21.
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seldom proximally; proximally; usually
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stipitate-glandular
sometimes; distally
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cordate
elliptic oblanceolate or spatulate ovate elliptic lanceolate oblanceolate or linear
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cordate
elliptic oblanceolate or spatulate ovate elliptic lanceolate oblanceolate or linear
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cordate
elliptic oblanceolate or spatulate ovate elliptic lanceolate oblanceolate or linear
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cordate
elliptic oblanceolate or spatulate ovate elliptic lanceolate oblanceolate or linear
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cordate
elliptic oblanceolate or spatulate ovate elliptic lanceolate oblanceolate or linear
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cordate
elliptic oblanceolate or spatulate ovate elliptic lanceolate oblanceolate or linear
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cordate
elliptic oblanceolate or spatulate ovate elliptic lanceolate oblanceolate or linear
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cordate
elliptic oblanceolate or spatulate ovate elliptic lanceolate oblanceolate or linear
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stipitate-glandular
sometimes
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stipitate-glandular
sometimes
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at maturity , more or less ampliate , tubes usually shorter
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at maturity , more or less ampliate , tubes usually shorter
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singly
in racemiform or subcorymbiform arrays; sometimes
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