Centaurea calcitrapa Linnaeus (Q2993)
Centaurea calcitrapa is a taxon with the rank species within the genus Centaurea
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Centaurea calcitrapa Linnaeus
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Centaurea calcitrapa is a taxon with the rank species within the genus Centaurea
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Statements
taxon/id/Centaurea calcitrapa Linnaeus
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Centaurea calcitrapa Linnaeus
Centaurea calcitrapa
Linnaeus
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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big-headed purple starthistle (English)
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CA-BC
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Klinkenberg, B. (ed.). 2010+. E-Flora BC: Electronic Atlas of the Plants of British Columbia. Lab. for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver, B.C. http://www.eflora.bc.ca http://www.eflora.bc.ca/
CA-ON
present
introduced
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Newmaster, S.G. & S. Ragupathy. 2005. Flora Ontario - Integrated Botanical Information System (FOIBIS), Phase I. University of Guelph, Canada. http://www.uoguelph.ca/foibis http://www.uoguelph.ca/foibis/
CA-ON
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US-AL
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US-AZ
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US-CA
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US-DC
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US-FL
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US-GA
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US-IL
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US-IA
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US-MD
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US-MA
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US-NJ
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US-NM
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US-NY
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US-OR
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US-PA
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US-UT
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US-VA
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US-WA
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Stems 1–several, often forming rounded mounds, puberulent to loosely tomentose.
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Leaves puberulent to loosely gray-tomentose, becoming ± glabrous, minutely resin-gland-dotted;
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proximal leaves petiolate, blades 10–20 cm, 1–3 times pinnately dissected, rosette with central cluster of spines;
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mid sessile, not decurrent, blades ovate, usually less than 10 cm, narrowly lobed;
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distal blades linear to oblong, entire to shallowly lobed.
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Heads disciform, borne singly or in leafy cymiform arrays, sessile or short-pedunculate.
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Involucres ovoid, 15–20 × 6–8 mm.
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Principal phyllaries: bodies greenish or stramineous, ovate, scarious-margined, appendages stramineous, spiny-fringed at base, each tipped by a stout spreading spine 10–25 mm.
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Inner phyllaries: appendages truncate, spineless.
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corollas purple, all ± equal, 15–24 mm;
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sterile corollas slender.
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Cypselae white or brown-streaked, 2.5–3.4 mm, glabrous;
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puberulent
loosely tomentose
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puberulent
loosely gray-tomentose
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glabrous
becoming more or less
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1-3 times pinnately dissected rosette
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1-3 times pinnately dissected rosette
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