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IRIDACEAE (the iris family)

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Originally appearing in Volume V14, Page 794 of the 1911 Encyclopedia Britannica.
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IRIDACEAE (the See also:iris See also:family) , in See also:botany, a natural See also:order of flowering See also:plants belonging to the See also:series Liliiflorae of the class Monocotyledons, containing about Boo See also:species in S7 genera, and widely distributed in temperate and tropical regions. The members of this order are generally perennial herbs growing from a corm as in See also:Crocus and See also:Gladiolus, or a rhizome as in Iris; more rarely, as in the See also:Spanish iris, from a bulb. A few See also:South See also:African representatives have a shrubby See also:habit. The See also:flowers are hermaphrodite and See also:regular as in Iris (fig. I) and Crocus (fig. 3), or with a symmetry in the median See also:plane as in Gladiolus. The petaloid perianth consists of two series, each with three members; which are joined below into a longer or shorter See also:tube, followed by one whorl of three stamens; the inferior ovary is three-celled and contains numerous ovules on an See also:axile See also:placenta; the See also:style is branched and the branches are often petaloid. The See also:fruit (fig. 2) is a See also:capsule opening between the partitions and containing generally a large number of roundish or angular seeds. The arrangement of the parts in the See also:flower resembles that in the nearly allied order Amaryllidaceae (See also:Narcissus, See also:Snowdrop, &c.), but differs in the See also:absence of the inner whorl of stamens. The most important genera are Crocus (q.v.), with about 70species, Iris (q.v.), with about roo, and Gladiolus (q.v.), with 150. Ixia, See also:Freesia (q.v.) and Tritonia (including Monlbretia), 1.

Flower, from which the See also:

outer petals and the stigmas have been removed, leaving the inner petals (a) and stamens. 2. See also:Pistil with petaloid stigmas. all natives of South See also:Africa, are well known in cultivation. Sisyrinchium, See also:blue-eyed grass, is a new-See also:world genus extending from See also:arctic See also:America to See also:Patagonia and the See also:Falkland Isles. One 3. Fruit cut across showing the three See also:chambers containing seeds. 4. A See also:seed. 1-4 about ; nat. See also:size. species, S. angustifolium, an arctic and temperate See also:North See also:American species, is also native in See also:Galway and See also:Kerry in See also:Ireland. Other See also:British representatives of the order are: Iris Pseudacorus, (yellow iris), See also:common by See also:river-See also:banks and ditches, I. foetidissima (stinking iris), Gladiolus communis, a rare plant found in the New See also:Forest and the Isle of See also:Wight, and Romulea Columnae, a small plant with narrow recurved leaves a few inches See also:long and a See also:short scape bearing one or more small regular See also:funnel-shaped flowers, which occurs at See also:Dawlish in See also:Devonshire.

End of Article: IRIDACEAE (the iris family)

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IRIARTE (or YRIARTE) Y OROPESA, TOMAS DE (1750-1791...
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