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(Last Modified On 9/4/2013)
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(Last Modified On 9/4/2013)
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Genus
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Galium L.
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PlaceOfPublication
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Sp. PI. 105. 1753.
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Note
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TYPE: Galium mollugo L.
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Description
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Erect or decumbent herbs or vines, the stems often 4-angled, slender. Leaves 3-4 or more at a node, verticillate; stipules foliaceous. Inflorescences terminal or axillary, in dichasial panicles, the flowers not subtended by an involucre. Flowers bisexual, unisexual or polygamous dioecious, pedicellate; hypanthium articulate with the pedicel; calycine cup ovoid or globose, the lobes reduced or absent; corolla white, yellow or green, the lobes 3-4, valvate in the bud; stamens 2-4, exserted, the styles 2, the stigmas capitate; ovary 2-celled, the ovules soli- tary. Fruits didymous, fleshy or dry, separating finally into closed segments or only one carpel maturing; seeds concave.
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Habit
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herbs or vines
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Distribution
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well distributed throughout the world, especially in the temperate climates.
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Reference
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Dempster, L. T. 1973. The Polygamous Species of the Genus Galium (Rubi- aceae) Section Lophogalium of Mexico and Southwestern United States. U. Calif. Publ. Bot. 64: 1-36. Dempster, L.T. 1978. The genus Galium (Rubiaceae) in Mexico and Central America. U. Calif. Publ. Bot. 73: 1-33. Greenman, J. M. 1898. Revision of the Mexican and Central American Species of Galium and Relbunium. Contr. Gray Herb. n.s. 14: 455-457.
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Key
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a. Leaves 6-8(-10) at a node ...... 2. G. mexicanum aa. Leaves 4 at a node. b. Leaves with lateral veins evident; fruit with white, uncinate hairs ...... 3. G. uncinulatum bb. Leaves with lateral veins not evident; fruit glabrous ...... 1. G. aschenbornii
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