articles de Geum canadense Jacq. - Encyclopédie de la Vie

Comprehensive Description ( anglais )

fourni par North American Flora

Geum canadense Jacq. Hort. Vind. 2: 82. 1773
Geum virginianum Murr. Novi Comm. Gott. 5: 32, in part. 1775. Not G, virginianum L1753. Geum carolinianum Walt. Fl. Car. 150. 1788. Geum album J. F. Gmel. Syst. Nat. 2: 861. 1791. Caryophyllata alba Moench, Meth. 660. 1794. Sieversia caroliniana G. Don, Gen. Hist. 2: 528. 1832.
Perennial, with a thick rootstock; stem 3-10 dm. high, finely pubescent or glabrate, or with scattered longer hairs, corymbosely branched above; basal leaves long-petioled; blades of the earlier ones reniform or rounded-cordate, round-lobed and dentate, those of the later usually ternate, with rhombic or obovate leaflets; lower stem-leaves ternate and short-petioled, the upper often simple and subsessile, ovate, acute, and 3-lobed; hypanthium glabrous or finely pubescent; bractlets linear, scarcely half as long as the lanceolate acuminate sepals, which are 5-7 mm. long; petals white, elliptic or oblong, seldom exceeding the sepals; fruiting head 10-12 mm. in diameter; carpels 30-50, rarely more; receptacle hispid; body of the achenes 2.5-3.5 mm. long, more or less bristly; lower internode of the style 4—5 mm. long, glabrous, the upper scarcely 1 mm. long, with a few hairs.
Type locality : Cultivated in the botanical garden of Vienna.
Distribution: Banks and among bushes, from Nova Scotia to Georgia, Texas, Kansas, and the Black Hills of South Dakota; central Mexico.

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citation bibliographique: Per Axel Rydberg. 1913. ROSACEAE (pars). North American flora. vol 22(5). New York Botanical Garden, New York, NY

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site partenaire: North American Flora

Comprehensive Description ( anglais )

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Geum meyerianum Rydberg
Geum agrimonioides C. Meyer, Ind. Sem. Petrop. 11: Suppl. 29. 1846. Not G. agrimonioides Pursh. 1814.
Perennial, with a thick rootstock; stem 3-10 dm. high, more or less hirsute; leaves, except the upper cauline ones, pinnate, with 3-7 leaflets; leaflets acuminate, obovate, ovate, or rhombic, incised or variously laciniate, or the terminal leaflet rounded, the upper leaflets often confluent; upper stem-leaves ternate or 3-lobed, the leaflets or lobes oblong-lanceolate, acuminate, dentate or sub-incised; bractlets linear, minute, one-fourth to one-third as long as the lanceolate acuminate sepals, which are about 6 mm. long; petals white or ochroleucous, elliptic or oval, about 6 mm. long, 3-4 mm. wide; receptacle densely hairy at least above; body of the achenes hispid above; upper internode of the style hispidulous, the lower internode 4 mm. long, glabrous.
Type locality: New York.
Distribution: Quebec and Ontario to Pennsylvania and the District of Columbia.

licence: cc-by-nc-sa-3.0

citation bibliographique: Per Axel Rydberg. 1913. ROSACEAE (pars). North American flora. vol 22(5). New York Botanical Garden, New York, NY

original: visiter la source
site partenaire: North American Flora

Comprehensive Description ( anglais )

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Geum camporum Rydberg, sp. no v
Perennial, with a thick rootstock; stem 5-10 dm. high, more or less short-hirsute, branched above; branches in fruit ascending-spreading; blades of the basal leaves firm, either simple, rounded-cordate, 3-6 cm. long, or ternate with rhombic-obovate divisions, somewhat lobed, irregularly dentate, sparingly pubescent on both sides; lower stem-leaves ternate, shortpetioled, the upper simple, rhombic-ovate, often 3-lobed, more or less acuminate; stipules obliquely ovate, coarsely toothed; hypanthium finely pubescent; bractlets linear, onethird to one-half as long as the ovate, shortacuminate sepals; petals ochroleucous, 4-5 mm. long, about equaling or somewhat shorter than the sepals, broadly obovate or suborbicular; fruiting head 15-18 mm. broad; carpels 50-80; receptacle hispid; body of the achenes 3-3.5 mm, long, more or less hispid; lower internode of the style 3-5 mm. long, glabrous, the upper 1-1.5 mm. long, with a few hairs.
Type collected at Manhattan, Kansas, August 11, 1892, J. B. Norton (herb. Columbia Univ.). Distribution: Moist woods and among bushes in the prairie region, from South Dakota and Minnesota to Texas and Arkansas.

licence: cc-by-nc-sa-3.0

citation bibliographique: Per Axel Rydberg. 1913. ROSACEAE (pars). North American flora. vol 22(5). New York Botanical Garden, New York, NY

original: visiter la source
site partenaire: North American Flora

Geum canadense ( azéri )

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Geum canadense (lat. Geum canadense) - gülçiçəyikimilər fəsiləsinin çınqılotu cinsinə aid bitki növü.

Mənbə

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Geum canadense: Brief Summary ( azéri )

fourni par wikipedia AZ

Geum canadense (lat. Geum canadense) - gülçiçəyikimilər fəsiləsinin çınqılotu cinsinə aid bitki növü.

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Geum canadense ( anglais )

fourni par wikipedia EN

Geum canadense, the white avens, is a plant in the rose family, Rosaceae. It is widespread across much of Canada, the United States, and Mexico.^[1]^[2]^[3]

It readily hybridizes with the introduced Geum urbanum. The hybrid is named Geum ×catlingii J.-P. Bernard & R. Gauthier^[4]

Description

Geum canadense is a herbaceous plant with basal leaves that have more than three leaflets and are arranged in a low rosette. Leaves above the basal rosette are alternate, with those placed just above the basal leaves typically trifoliate, and upper leaves usually simple. These cauline leaves are serrate.^[5] Basal leaves are a darker green and are often coarsely hairy compared to the lighter green and fine hairs found on upper leaves and stems.^[5] In milder climates the foliage is evergreen.^[6]

Blooming occurs for one to two months in the summer; each flower has five white petals and five green sepals. Flowers are replaced by clusters of long, thin seeds each with a hook on one end that may catch on clothing or animal fur.^[5] The flowers resemble those of other members of the rose family such as blackberries^[5] and strawberries.^[6]

The root system consists of a taproot and rhizomes. The plants prefer light shade or partial sun and moist to dry conditions. Somewhat unusually, they are resistant to the phytotoxins released by black walnut trees and so can grow near such trees.^[5]

Retrieved from "https://en.wikipedia.org/w/index.php?title=Geum_canadense&oldid=1124716255"

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Geum canadense: Brief Summary ( anglais )

fourni par wikipedia EN

Geum canadense, the white avens, is a plant in the rose family, Rosaceae. It is widespread across much of Canada, the United States, and Mexico.

It readily hybridizes with the introduced Geum urbanum. The hybrid is named Geum ×catlingii J.-P. Bernard & R. Gauthier

licence: cc-by-sa-3.0
droit d’auteur: Wikipedia authors and editors

original: visiter la source
site partenaire: wikipedia EN

Geum canadense ( espagnol ; castillan )

fourni par wikipedia ES

Geum canadense Jacq., es una especie de planta herbácea perteneciente a la familia Rosaceae. Es natural de Canadá.

Detalle de la flor

Vista de la planta

Características

Es una planta herbácea con el tallo erecto y pubescente que alcanza los 75 cm de altura. Las hojas son alternas, pecioladas, serradas y pubescentes por el envés, con largos peciolos en las hojas basales que se reducen hasta 1 cm en las superiores. Las hojas más bajas caulinas son trifoliadas y las superiores simplemente lobuladas. Las flores son solitarias en cimas terminales o axilares con pedicelos de 5 cm de longitud, estas tienen 1.5 cm de ancho con cinco pétalos blancos. El fruto es un aquenio globoso.

Taxonomía

Geum canadense fue descrita por Nikolaus Joseph von Jacquin y publicado en Hortus Botanicus Vindobonensis 2: 82, pl. 175, en el año 1773.^[1]^[2]

Etimología

Geum: nombre genérico que deriva del latín: gaeum(geum) = nombre de una planta, en Plinio el Viejo, con finas raíces negras y de buen olor, que se ha supuesto era la hierba de San Benito (Geum urbanum L.)^[3]

canadense: epíteto geográfico que alude a su localización en Canadá