Rutaceae
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Read about Rutaceae in the Standard Cyclopedia of Horticulture
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Rutaceae (from the genus Ruta, the ancient name). Rue Family. Fig. 30. Herbs, rarely shrubby: leaves usually alternate, simple or variously cut or compound, usually with pellucid dots: flowers bisexual, usually regular; sepals 4-5, often coherent, imbricated; petals 4-5, imbricated or valvate, usually separate; stamens 8-10, rarely 15, inserted at the base of a thick disk, usually distinct; ovary superior, 2-5-lobed, 2-5-celled; each cell 1 to many-ovuled, raised on a prolongation of the receptacle, a glandular disk at its base; styles usually connate: fruit a capsule opening by valves, or fleshy and indehiscent, or separating into fruitlets, rarely winged. Rutaceae contains over 100 genera and about 900 species, mostly of tropical countries but extending into temperate parts of Europe and America. Fagara, with more than 130 species, is the largest genus. The Rutaceae are related to many of the Geranium group, especially to Simarubaceae, Zygophyllaceae, and Meliaceae. The transparent dots in the leaves, the numerical plan, and especially the lobed ovary raised on the disk or stalk, are together distinctive. The disk is often much developed and very diversely constructed. The outer stamens are usually opposite the petals, not alternate with them as might be expected. In some cases the carpels are entirely free below and united only by the styles or stigmas. The seeds, except in the berry fruits, are only 1 or 2. The great development of oil-glands containing a fragrant oil is one of the most characteristic features of the family. These glands are produced on all parts of the plant, even on the floral parts and surface of the fruits. The orange and lemon are examples of Rutaceae with berry fruits, and they are widely cultivated and perplexingly variable. The volatile oil of the Rutaceae has been used to some extent for medicine and also for perfumery. Extract of rue has been used as a vermifuge. The Romans used rue as a condiment. Some species of rue are so pungent as to produce a poisoning of the skin similar to that produced by poison ivy. The volatile oil is so copious in Dictamnus as to ignite readily. Several species of Barosma (buchu) are tonic and diuretic. The genus Citrus is the most useful. It includes the orange, the bitter orange, the citron, the lemon, the lime, the grape-fruit, the kid-glove orange or tangerine, and the bergamot from the rind of which bergamot oil is manufactured, used in perfumery. The bark of the prickly shrub, Zanthoxylum, is sometimes used as a tonic. The seeds of some species of Zanthoxylum are used to poison fish. In cultivation in America or worthy of trial are 20 to 30 genera, used mostly for ornament and fruit. Among these are: Adenandra (Breath of Heaven); Aegle (Bael Fruit, Bengal Quince); Atalantia; Balsamocitrus (African Bael-Fruit); Calodendron (Cape Chestnut) ; Casimiroa (White Sapota) ; Citrus (Orange, Lemon); Dictamnus (Dittany, Gas Plant, Burning Bush) ; Fagara (Prickly Ash) ; Feronia (Wood Apple) ; Murraya (Orange Jessamine, Satinwood); Phellodendron (Chinese Cork Tree); Poncirus (Trifoliate Orange); Ptelea (Hop Tree); Ruta (Rue); Triphasia (Bergamot Lime, Lime Berry) ; Zanthoxylum (Prickly-Ash, Chinese or Japanese Pepperwood, Toothache Tree).CH
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Genera
About 160, totaling over 1600 specieswp.
Gallery
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various Citrus fruits
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References
- Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963
External links
- w:Rutaceae. Some of the material on this page may be from Wikipedia, under the Creative Commons license.
- Rutaceae QR Code (Size 50, 100, 200, 500)
