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(Last Modified On 6/14/2013)
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(Last Modified On 6/14/2013)
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Species
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Zinnia elegans Jacq.
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PlaceOfPublication
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Ic. PI. Rar. 3, tab. 587. 1793
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Note
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TYPE: Jacquin s.n. (BM?, holotype, not seen).
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Description
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Annual herb to 42 cm tall; stems erect to decumbent, 2-5 mm diam., glabrous below to antrorsely strigose above with hairs 0.3 mm long. Leaves sessile; blades narrowly ovate, 3-5 cm long, 1-2.3 cm wide, acute, the base obtuse to sub- auriculate, both surfaces glabrous and resin-dotted, the margin entire and ciliate with hairs 0.1 mm long. Inflorescence with peduncles 2-15 cm long, 2-4 mm diam. Heads radiate, 1.5-2.8 cm tall, 3-6 cm across; involucre hemispheric, 1.3-2.5 cm diam., multiseriate, the bracts oblong, the outermost the shortest, 2-4 mm long, 3-4 mm wide, increasing in size to the innermost, to 10 mm long, apically rounded with a green to black border, glabrous; paleas lanceolate, to 15 mm long, 5 mm wide, apically pink to purple and fimbriate; ray florets 9-12 (sometimes many more in cultivated forms), the ligules red-orange above, yellow-green below, broadly oblanceolate, 1-2.5 cm long, 0.6-1.8 cm wide, the tube absent; disc florets over 50, the corollas yellow, the lobes black-purple and densely pubescent on the abaxial surface, cylindrical, 9 mm long, 0.6 mm diam., the tube slightly swollen below throat, the anthers 5, black. Ray achenes triquetrous, 7-8 mm long, 4-5 mm diam., strigillose with hairs 0.1 mm long; disc achenes compressed but nearly triquetrous, with small lateral wings extending upward 0.3 mm from the apex; pappus absent. Chromosome number n = 12.
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Habit
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herb
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Note
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This species is native to Mexico, but because of its ornamental value, it has been transported to many parts of the world and has often escaped from cultivation. This is apparently what has happened to the species in Panama. Flowering Panamanian collections have been made in January, June, and August.
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Distribution
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native to Mexico
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Native
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Mexico
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Specimen
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CANAL ZONE: Sabanas, Paul 7 (US). Rio Pedro Miguel, near East Paraliso, Standley 30014 (US). COLON: Purchased in market, Colon, D'Arcy & D'Arcy 6700 (MO). SAN BLAS: Soskatupu, 0-150 ft. Elias 1674 (MO, UC).
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Tag
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Project Name
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Tag
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