Medicago orbicularis — Details

Medicago orbicularis (L.) All.:
Chile (South America)
United States (North America)

Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville. http://www.tropicos.org/Reference/1103
Gleason, H. A. 1968. The Choripetalous Dicotyledoneae. vol. 2. 655 pp. In H. A. Gleason Ill. Fl. N. U.S. (ed. 3). New York Botanical Garden, New York. http://www.tropicos.org/Reference/1704
Marticorena, C. & M. Quezada. 1985. Catálogo de la Flora Vascular de Chile. Gayana, Bot. 42: 1–157. http://www.tropicos.org/Reference/1592
Reed, C. R. 1964. A Flora of the chrome and manganese ore piles at Canton, in the Port of Baltimore, Maryland and at Newport News, Virginia, with descriptions. Phytologia 10(5): 321–406. http://www.tropicos.org/Reference/409
Radford, A. E., H. E. Ahles & C. R. Bell. 1968. Man. Vasc. Fl. Carolinas i–lxi, 1–1183. University of North Carolina Press, Chapel Hill. http://www.tropicos.org/Reference/636
Correll, D. S. & M. C. Johnston. 1970. Man. Vasc. Pl. Texas i–xv, 1–1881. The University of Texas at Dallas, Richardson. http://www.tropicos.org/Reference/1493
Munz, P. A. & D. D. Keck. 1959. Cal. Fl. 1–1681. University of California Press, Berkeley. http://www.tropicos.org/Reference/1717

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National Distribution

Canada

Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Source: NatureServe

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Distribution

Distribution: Pakistan [N.W.F. Province, Baluchistan (Burkill, List Fl.Pl. Baluch. 1909)]; Iran, Iraq, Palestine, Lebanon, Syria; Egypt, Turkey, Greece, Russia (Caucasus), S. Europe, Tunisia, Algeria; Morocco.

Flora of Pakistan @ eFloras.org

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Physical Description

Morphology

Physical Description

Annual, Herbs, Taproot present, Nodules present, Stems prostrate, trailing, or mat forming, Stems less than 1 m tall, Stems solid, Stems or young twigs glabrous or sparsely glabrate, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules green, triangulate to lanceolate or foliaceous, Stipules persistent, Stipules free, Stipules toothed or laciniate, Leaves compound, Leaves pinnately 3-foliolate, Leaves odd pinnate, Leaflets dentate or denticulate, Leaflets opposite, Leaflets 3, Leaves glabrous or nearly so, Leaves hairy on one or both surfaces, Flowers in axillary clusters or few-floweredracem es, 2-6 flowers, Inflorescences racemes, Inflorescence axillary, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals orange or yellow, Banner petal ovoid or obovate, Wing petals narrow, oblanceolate to oblong, Wing petals auriculate, Wing tips obtuse or rounded, Keel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Fruit a legume, Fruit unilocular, Fruit indehiscent, Fruit spirally coiled or contorted, Fruit exserted from calyx, Fruit hairy, Fruit gland-dotted or with gland-tipped hairs, Fruit 2-seeded, Fruit 3-10 seeded, Seeds reniform, Seed surface smooth, Seeds olive, brown, or black.

Dr. David Bogler

Source: USDA NRCS PLANTS Database

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Description

Annual, stem 10-45 cm, glabrous to subglabrous. Leaflets 7-18 mm long, obovate to cuneate, mostly retuse, dentate; stipules laciniate. Inflorescence a 1-5-flowered peduncled raceme, peduncle longer than the petiole. Calyx c. 3.5 mm long, teeth almost equal to the tube. Corolla about twice the calyx, yellow. Fruit discoid, with 3-7 coils, 4-5 mm broad, glabrous.

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Ecology

Associations

In Great Britain and/or Ireland:
Foodplant / parasite
Erysiphe pisi var. pisi parasitises Medicago orbicularis

Source: BioImages - the Virtual Fieldguide (UK)

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Life History and Behavior

Cyclicity

Flower/Fruit

Fl.Per.: March-April.

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Medicago orbicularis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Species: 1
Species With Barcodes: 1

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Source: Barcode of Life Data Systems (BOLD)

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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNA - Not Applicable

United States

Rounded National Status Rank: NNA - Not Applicable

Source: NatureServe

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NatureServe Conservation Status

Rounded Global Status Rank: GNR - Not Yet Ranked

Source: NatureServe

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Wikipedia

Medicago orbicularis

Medicago orbicularis is a plant species of the genus Medicago. It is found throughout the Mediterranean basin. It forms a symbiotic relationship with the bacterium Sinorhizobium medicae, which is capable of nitrogen fixation. Common names include button clover, button medick, and round-fruited medick.

Gallery

seed pods
seeds

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