Symphyotrichum yukonense (Cronquist) G. L. Nesom (Q2505)
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Symphyotrichum yukonense is a taxon with the rank species within the subgenus Symphyotrichum subg. Virgulus
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Symphyotrichum yukonense (Cronquist) G. L. Nesom
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Symphyotrichum yukonense is a taxon with the rank species within the subgenus Symphyotrichum subg. Virgulus
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Statements
taxon/id/Symphyotrichum yukonense (Cronquist) G.L. Nesom
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Symphyotrichum yukonense (Cronquist) G.L. Nesom
Symphyotrichum yukonense
(Cronquist) 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-BC
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Douglas, G.W., G.B. Straley, D.V. Meidinger & J. Pojar. 1998. Illustrated Flora of British Columbia. B.C. Ministry of Environment, Lands & Parks and B.C. Ministry of Forests. Victoria. Crown Publications. 8 vols.
CA-YT
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Cody, W.J. 2000. Flora of the Yukon Territory. 2nd ed. National Research Press, Ottawa. 669 pp.
CA-NT
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Porsild, A.E. & W.J. Cody. 1980. Vascular Plants of the Continental Northwest Territories, Canada. National Museum of Natural Sciences, Ottawa, Ont. 667 pp.
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300–1500 m
300 meter
1,500 meter
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with short, erect, woody caudices from long, thin rhizomes.
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Stems 1–8+, erect (purplish to brown, slender), villous, more densely so distally, distally moderately stipitate-glandular.
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Leaves (yellowish to dark green. midrib purplish, often prominent) thin, reduced distally, margins entire;
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basal withering by flowering, winged-petiolate to subpetiolate (petioles ± sheathing), blades narrowly oblanceolate, 8–15 × 1–3 mm, bases attenuate, margins scabrous, apices obtuse to acute, faces glabrous or glabrate;
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proximal cauline often withering by flowering, sessile or subsessile, blades linear-oblanceolate, 20–70 × 1–4 mm, bases ± clasping, margins ciliate, apices acute, abaxial faces glabrous or midnerve ± sparsely villous, adaxial glabrous or sparsely villous, midnerves ± villous;
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distal sessile, blades linear-lanceolate, 10–30 × 1–2.5 mm, bases ± subclasping, ± rounded to subauriculate, margins sometimes stipitate-glandular, apices acute, mucronate or white-spinulose, faces glabrous or sparsely villous, short-stipitate-glandular.
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Heads usually borne singly, sometimes in open, corymbo-paniculiform arrays, branches ascending.
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Peduncles ± densely short-villous, ± densely stipitate-glandular, bracts 1–3, foliaceous, reduced.
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Involucres campanulate, 7–10 mm.
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Phyllaries in 3–4 (–5) series, linear-lanceolate, subequal, bases scarious, margins hyaline or purplish, scarious, erose, ciliate or short-stipitate-glandular, green zones herbaceous at least distally, often purplish to purple, apices long-acuminate, spreading to reflexed, faces ± densely villous (outer more so), ± densely stipitate-glandular.
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Ray-florets (8–) 15–30;
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corollas purple to blue, laminae 5–11 × 0.5–2 mm.
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Disc-florets 16–38;
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corollas yellow becoming brown, 4–6.5 mm, lobes triangular, 0.4–0.8 mm.
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Cypselae brown (sometimes purplish, nerves stramineous), narrowly obovoid, ± compressed, ca. 3 mm, 7–10-nerved, faces sparsely to moderately sericeo-strigose;
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pappi sordid (barb tips sometimes purplish-tinged), 3.5–4.8 mm. 2n = 10.
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stipitate-glandular
densely; distally; distally moderately
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villous
more or less sparsely
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villous
more or less sparsely
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short-stipitate-glandular
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short-villous
more or less densely
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stipitate-glandular
more or less densely
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stipitate-glandular
more or less densely
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sericeo-strigose
sparsely to moderately
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