Taraxacum laurentianum Fernald (Q3186)
Taraxacum laurentianum is a taxon with the rank species within the genus Taraxacum
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Taraxacum laurentianum Fernald
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Taraxacum laurentianum is a taxon with the rank species within the genus Taraxacum
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Statements
taxon/id/Taraxacum laurentianum Fernald
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Taraxacum laurentianum Fernald
Taraxacum laurentianum
Fernald
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 19: Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York.
accepted
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pissenlit du golfe du Saint-Laurent (French)
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Gulf of St. Lawrence dandelion (English)
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CA-QC
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Marie-Victorin, Fr. 1995. Flore laurentienne. 3e éd. Mise à jour et annotée par L. Brouillet, S.G. Hay, I. Goulet, M. Blondeau, J. Cayouette et J. Labrecque. Gaétan Morin éditeur. 1093 pp.
Newfoundland, CA
present
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Meades, S., S.G. Hay & L. Brouillet. 2000. Annotated Checklist of the Vascular Plants of Newfoundland and Labrador. Published in association with A Digital Flora of Newfoundland and Labrador Vascular Plants. http://www.digitalnaturalhistory.com/meades.htm (consulted 2009-09-02) http://www.digitalnaturalhistory.com/meades.htm
Labrador, CA
doubtful
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CA-NL
Nfld. and Labr. (Nfld.)
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CA-QC
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taproots branched.
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Stems 1–5+, erect to ascending, purplish, (usually exceeding leaves), glabrate to sparsely villous, sometimes more densely so distally.
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sessile to ± broadly winged-petiolate;
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blades oblanceolate (some younger leaves ± runcinate at least proximally), 10–30 × 2–4 cm, bases cuneate to attenuate, margins sometimes ± deeply lobed (younger leaves), usually toothed, larger teeth well developed, lobelike, retrorse to antrorse, lanceolate to triangular or sometimes deltate, sometimes double, acuminate, apices obtuse, faces adaxially sparsely pilose or glabrate (denser on midveins), abaxially glabrous or glabrate.
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Calyculi 15–18, ascending, later spreading and recurving, greenish or purplish, broadly lanceolate to narrowly ovate (herbaceous) bractlets in 2–3 series, 15–21 × 3.5–5.5 mm, margins hyaline, often purplish, narrowly scarious, apices long to short-acuminate, strongly horned, tips purplish, scarious, erose.
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Involucres green, broadly campanulate, 18–26 mm.
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Phyllaries 18–25 in 2 series, lanceolate (outer) to ovatelanceolate (inner), 2.5–5.2 mm wide, margins scarious narrowly or not (outer) to broadly so proximally and narrowly distally (inner), apices long-acuminate (sometimes tapered), strongly horned, tips scarious, purplish black, erose.
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Florets ca. 150+;
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corollas yellow (abaxially gray-striped, becoming purplish in drying), 14–25 × 0.8–1.5+ mm.
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Cypselae grayish-olivaceous to tan or olivaceous straw, bodies oblanceoloid to obovoid, 3.2–4 mm, cones narrowly conic, 0.9–1.2 mm, beaks slender, 10–17 mm, ribs 5 (wide) –14 (narrow), faces proximally ± tuberculate (sometimes ribs smooth), muricate in distal 1/3–1/2;
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pappi creamy, 8–9.5 mm. 2n = 40 [unpublished].
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sessile
more or less broadly winged-petiolate
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sometimes more or less deeply
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broadly lanceolate
narrowly ovate
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grayish-olivaceous
tan or olivaceous straw
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tuberculate
proximally more or less
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