Symphyotrichum nahanniense (Cody) Semple

Species

Angiosperms > Asterales > Asteraceae > Symphyotrichum

Characteristics

Perennials, 7–39 cm, cespitose; slender, woody, short-rhizomatous (rhizomes of season shallow-or deep-seated, not producing ro­settes near parent stems). Stems 1, ascending to decumbent (slender, green to reddish brown), glabrate or sparsely short woolly-pilose in lines or zones, more densely so distally. Leaves (light green, abaxial sometimes becoming much darker) thin to firm, margins entire, scabrous, apices mucronulate, faces glabrous; basal persistent or withering by flowering, petiolate, blades oblanceolate to short-spatulate, 10–130 × 2–8 mm, bases cuneate to attenuate, margins rarely sparsely serrulate, apices obtuse, faces glabrous; proximal cauline persistent or withering by flowering, sessile, blades oblanceolate to linear lanceolate, 13–60 × 2–6 mm, bases ± clasping, apices acute; distal sessile, blades linear to linear-lanceolate, 10–36 × 1–4 mm, reduced distally, bases subauriculate, subclasping to ± clasping. Heads usually borne singly or in open, paniculiform arrays (sometimes terminating lateral branches arising from decumbent stems or from proximal stem branches), branches few. Peduncles 10–70 mm, sparsely to moderately short-strigose, bracts 0–10, lanceolate, often foliaceous, reduced distally. Involucres cylindro-campanulate, 4.7–7.4 mm. Phyllaries in 3–4 series, outer spatulate, inner lanceolate, ± unequal to subequal, bases indurate, margins reddish, papery, erose-ciliate, green zones lanceolate, apices acute, faces glabrous. Ray florets 15–41; corollas white to pale rose, often becoming rose-violet, laminae 5–13 × 0.7–1.8 mm. Disc florets 20–60; corollas yellow turning reddish with age, 3.7–6.6 mm, tubes shorter than funnelform throats, lobes erect to spreading, lanceolate, 0.4–0.8 mm. Cypselae tan (nerves stramineous), obovoid, compressed, 2–3 mm, 3–5-nerved, faces strigillose; pappi white, 4–6.5 mm. 2n = 16.
Life form perennial
Growth form herb
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Sexuality hermaphrodite
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Cultivation

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Images

Symphyotrichum nahanniense unspecified picture

Distribution

Symphyotrichum nahanniense world distribution map, present in Canada

Conservation status

Symphyotrichum nahanniense threat status: Near Threatened

Identifiers

LSID urn:lsid:ipni.org:names:20011410-1
WFO ID wfo-0000128987
COL ID 53Q8J
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Aster nahanniensis Symphyotrichum nahanniense