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| | genus_authority = [[Carolus Linnaeus|L.]] | | | genus_authority = [[Carolus Linnaeus|L.]] |
| | subdivision_ranks = Species | | | subdivision_ranks = Species |
− | | subdivision = | + | | subdivision = See text. |
− | See text. | |
| }} | | }} |
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− | {{for|the Alamannic leader|Chrocus}}
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− | {{for|the CROCUS nuclear reactor|École polytechnique fédérale de Lausanne}}
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| [[Image:Eiger.jpg|thumb|left|Wild crocus growing in the foothills of the [[Eiger]] in the [[Alps|European Alps]].]] | | [[Image:Eiger.jpg|thumb|left|Wild crocus growing in the foothills of the [[Eiger]] in the [[Alps|European Alps]].]] |
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| The genus ''Crocus'' is placed botanically in the iris family ([[Iridaceae]]). The plants grow from [[corm]]s and are mainly [[Hardiness (plants)|hardy]] perennials, and are found a wide range of [[Habitat (ecology)|habitat]]s, including woodland, scrub and meadows. | | The genus ''Crocus'' is placed botanically in the iris family ([[Iridaceae]]). The plants grow from [[corm]]s and are mainly [[Hardiness (plants)|hardy]] perennials, and are found a wide range of [[Habitat (ecology)|habitat]]s, including woodland, scrub and meadows. |
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− | There are about eighty species of crocus (of which approximately 30 are cultivated). Their cup-shaped, solitary, salverform flowers taper off into a narrow tube. Their color varies enormously, although lilac, mauve, yellow and white are predominant. The grass-like, ensiform [[leaf]] shows generally a white central stripe along the leaf axis. The leaf margin is entire. All crocuses typically have three stamens. | + | There are about eighty species of crocus, of which approximately 30 are commonly cultivated. Their flowers are cup-shaped, solitary, salverform, tapering off into a narrow tube; they vary enormously in colour, though lilac, mauve, yellow and white are predominant. The grass-like, ensiform [[leaf]] generally shows a white central stripe along the leaf axis. The leaf margin is entire. All crocuses typically have three stamens. |
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| The name of the genus is derived from the Latin adjective ''crocatus'', meaning saffron yellow. The spice [[saffron]] is obtained from the [[Carpel|stigma]]s of ''Crocus sativus'', an autumn/fall-blooming [[species]]. | | The name of the genus is derived from the Latin adjective ''crocatus'', meaning saffron yellow. The spice [[saffron]] is obtained from the [[Carpel|stigma]]s of ''Crocus sativus'', an autumn/fall-blooming [[species]]. |
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− | ==Misuses of the name crocus==
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− | Though some true crocus bloom with the fall (autumn) rains, after summer's heat and drought, the name '''autumn crocus''' is often misused{{Fact|date=March 2007}} as a common name for [[Colchicum]], which is in the lily family ([[Liliaceae]]), and which has six stamens; it is also (confusingly and incorrectly) known as '''meadow saffron'''. The so-called [[Pasque flower|'''prairie crocus''']] (formerly ''Anemone patens'', now ''Pulsatilla patens'' or ''P. ludoviciana'') belongs to the buttercup family ([[Ranunculaceae]]).
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| ==True autumn crocuses== | | ==True autumn crocuses== |
| <gallery> | | <gallery> |
| image:CrocusVernusPickwick.jpg|''Crocus vernus'' 'Pickwick', a Dutch hybrid | | image:CrocusVernusPickwick.jpg|''Crocus vernus'' 'Pickwick', a Dutch hybrid |
− | image:CrocusEABowles.jpg|''Crocus'' 'E.A. Bowles', <br /> a Chrysanthus hybrid | + | image:CrocusEABowles.jpg|''Crocus'' 'E.A. Bowles', a Chrysanthus hybrid |
| Image:Frühlingsblumen Krokus.jpg|Crocus [[cultivars]] | | Image:Frühlingsblumen Krokus.jpg|Crocus [[cultivars]] |
| </gallery> | | </gallery> |
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| ==In cultivation== | | ==In cultivation== |
− | | + | As one of the first flowers to bloom in spring, the large selected [[hybrid]] Dutch crocus are popular with gardeners. However, in areas where snow and frost occasionally occur in the early spring it is not uncommon for early-flowering crocuses to suddenly wither and die from a unseasonable frost or snowfall. |
− | As one of the first flowers to bloom in spring, the large [[hybrid]]ized and selected "Dutch crocus" are popular with gardeners. However, in areas where snow and frost occasionally occur in the early spring it is not uncommon for early-flowering crocuses to suddenly wither and die from a unseasonable frost or snowfall. | |
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| Most crocus species and hybrids should be planted in a sunny position, in gritty, well-drained soil, although a few prefer shadier sites in moist soil. Some are suitable for naturalising in grass. The corms should be planted about 3–4 cm deep; in heavy soils a quantity of sharp grit should be dug in to improve drainage. | | Most crocus species and hybrids should be planted in a sunny position, in gritty, well-drained soil, although a few prefer shadier sites in moist soil. Some are suitable for naturalising in grass. The corms should be planted about 3–4 cm deep; in heavy soils a quantity of sharp grit should be dug in to improve drainage. |
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− | Some crocuses, especially ''C. tommasini | + | Some crocuses, especially ''C. tommasinianus'' and its selected forms and hybrids (such as 'Whitewell Purple' and 'Ruby Giant') seed prolifically and are ideal for naturalising. They can, however, become [[weed]]s in [[rock garden]]s, where they will often appear in the middle of choice, mat-forming alpine plants and can be difficult to remove. |
− | anus'' and its selected forms and hybrids (such as 'Whitewell Purple' and 'Ruby Giant') seed prolifically and are ideal for naturalising. They can, however, become [[weed]]s in [[rock garden]]s, where they will often appear in the middle of choice, mat-forming alpine plants and can be difficult to remove.
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| ==History== | | ==History== |
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| ::* ''[[Crocus kosaninii]]'' | | ::* ''[[Crocus kosaninii]]'' |
| ::* ''[[Crocus tommasinianus]]'' - early crocus | | ::* ''[[Crocus tommasinianus]]'' - early crocus |
− | ::* ''[[Crocus vernus]]'' - spring crocus, Dutch crocus | + | ::* ''[[Crocus vernus]]'' - spring crocus |
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| ::Series Versicolores | | ::Series Versicolores |
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| :B. Section Nudiscapus | | :B. Section Nudiscapus |
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| ::Series Aleppici | | ::Series Aleppici |
| ::* ''[[Crocus aleppicus]]'' | | ::* ''[[Crocus aleppicus]]'' |
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| ::* ''[[Crocus veneris]]'' | | ::* ''[[Crocus veneris]]'' |
| ::* ''[[Crocus saris]]'' | | ::* ''[[Crocus saris]]'' |
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| ::Series Biflori | | ::Series Biflori |
| ::* ''[[Crocus adanensis]]'' | | ::* ''[[Crocus adanensis]]'' |
| ::* ''[[Crocus aerius]]'' | | ::* ''[[Crocus aerius]]'' |
| ::* ''[[Crocus almehensis]]'' | | ::* ''[[Crocus almehensis]]'' |
− | ::* ''[[Crocus biflorus]]'' - silvery crocus, Scotch crocus | + | ::* ''[[Crocus biflorus]]'' - silvery crocus |
| ::* ''[[Crocus caspius]]'' | | ::* ''[[Crocus caspius]]'' |
| ::* ''[[Crocus chrysanthus]]'' - golden crocus | | ::* ''[[Crocus chrysanthus]]'' - golden crocus |
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| ::* ''[[Crocus leichtlinii]]'' | | ::* ''[[Crocus leichtlinii]]'' |
| ::* ''[[Crocus paschei]]'' | | ::* ''[[Crocus paschei]]'' |
− | ::* ''[[Crocus | + | ::* ''[[Crocus pestalozzae]]'' |
− | pestalozzae]]'' | |
| ::* ''[[Crocus wattiorum]]'' | | ::* ''[[Crocus wattiorum]]'' |
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| ::* ''[[Crocus robertianus]]'' | | ::* ''[[Crocus robertianus]]'' |
| ::* ''[[Crocus rujanensis]]'' | | ::* ''[[Crocus rujanensis]]'' |
− | ::* ''[[Crocus sieberi]]'' - Cretan crocus | + | ::* ''[[Crocus sieberi]]'' - Sieber's crocus |
| ::* ''[[Crocus sieheanus]]'' | | ::* ''[[Crocus sieheanus]]'' |
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| ::Series Speciosi | | ::Series Speciosi |
− | ::* ''[[Crocus speciosus]]'' - Bieberstein's crocus, large purple crocus | + | ::* ''[[Crocus speciosus]]'' - Bieberstein's crocus |
| ::* ''[[Crocus pulchellus]]'' - hairy crocus | | ::* ''[[Crocus pulchellus]]'' - hairy crocus |
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| 2. Subgenus Crociris | | 2. Subgenus Crociris |
| :* ''[[Crocus banaticus]]'' | | :* ''[[Crocus banaticus]]'' |
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| + | ==Misuses of the name crocus== |
| + | Though some true crocus bloom with the fall (autumn) rains, after summer's heat and drought, the name "autumn crocus" is often misused as a common name for [[Colchicum]], which is in the lily family ([[Liliaceae]]), and which has six stamens; it is also (confusingly and incorrectly) known as "meadow saffron". The so-called "prairie crocus" (formerly ''Anemone patens'', now ''[[Pasque flower|Pulsatilla patens]]'' or ''P. ludoviciana'') belongs to the buttercup family ([[Ranunculaceae]]). |
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| == References == | | == References == |