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(Last Modified On 8/28/2013)
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(Last Modified On 8/28/2013)
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Genus
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Coffea L.
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PlaceOfPublication
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Sp. P1. 172. 1753
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Note
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TYPE: C. arabica L.
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Description
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Shrubs, rarely pubescent. Leaves occasionally ternate, usually petiolate, the stipules free, acuminate, persistent. Inflorescences with flowers conglomerate in the axils, the bracteoles connate into a calyxlike cup. Flowers sessile or pedi- cellate, the hypanthium variously shaped; calycine cup reduced, truncate, dentate or lobulate, often bearing small glands within; corolla salverform or funnelform, the lobes 4-8, contorted; stamens 4-8, sessile or on short filaments inserted in the throat, the anthers linear, basally dorsifixed, exserted or included, often twist- ed; ovarian disc swollen, the style slender or thick, the stigmas 2, narrow, the ovary 2-celled, the ovules solitary, subpeltately affixed to the middle of the sep- tum. Fruits baccate, dry or fleshy, the 2 carpels often coriaceous, convex but plane and sulcate on the inner face; seeds 2, convex, the testa membranous with a deep groove on the ventral side.
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Habit
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Shrubs
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Distribution
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This is a genus of about 40 species represented in the tropics of the Old World, especially in Africa.
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Note
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The 2 species, Coffea arabica and C. liberica, supply most of the coffee of commerce.
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Reference
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Standley, P. C. & L. 0. Williams. 1975. Coffea Linnaeus Coffee (part of Ru- biaceae of Guatemala). Fieldiana 24, part II: 44.
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Key
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a. Flowers 5-merous ...... 1. C. arabica aa. Flowers 6-8-merous ...... 2. C. liberica
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