Crocus

Crocus (English plural: crocuses or croci) is a genus of flowering plants in the iris family comprising 90 species of perennials growing from corms. Many are cultivated for their flowers appearing in autumn, winter, or spring. The spice saffron is obtained from the stigmas of Crocus sativus, an autumn-blooming species. Crocuses are native to woodland, scrub, and meadows from sea level to alpine tundra in central and southern Europe, North Africa and the Middle East, on the islands of the Aegean, and across Central Asia to Xinjiang Province in western China.[1][2][3]

Crocus
%D8%A8%D8%B1%D8%AF%D8%A7%D8%B4%D8%AA %D8%B2%D8%B9%D9%81%D8%B1%D8%A7%D9%86 %D8%AF%D8%B1 %D8%B1%D9%88%D8%B3%D8%AA%D8%A7%DB%8C %D8%B2%D8%A7%D9%84%DB%8C %D8%B9%DA%A9%D8%B3 %D8%A7%D8%B2 %D8%A7%D8%AD%D9%85%D8%AF %D9%86%DB%8C%DA%A9 %DA%AF%D9%81%D8%AA%D8%A7%D8%B1
Crocus sativus
Scientific classification
Kingdom: Plantae
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Iridaceae
Subfamily: Crocoideae
Genus: Crocus
L.
Type species
Crocus sativus
L.
Synonyms[1]
  • Safran Medik.
  • Geanthus Raf.
  • Crociris Schur

Etymology

The name of the genus is derived from the Greek κρόκος (krokos).[4] This, in turn, is probably a loan word from a Semitic language, related to Hebrew כרכום karkōm, Aramaic ܟܟܘܪܟܟܡܡܐ kurkama, and Arabic كركم kurkum, which mean "saffron" (Crocus sativus), "saffron yellow" or turmeric (see Curcuma).[5] The word ultimately traces back to the Sanskrit kunkumam (कुङ्कुमं) for "saffron".[6] The English name is a learned 16th-century adoption from the Latin, but Old English already had croh "saffron".[7]

History

Cultivation and harvesting of Crocus sativus for saffron was first documented in the Mediterranean, notably on the island of Crete. Frescos showing them are found at the Knossos site on Crete,[8] as well as from the comparably aged Akrotiri site on Santorini.

The first crocus seen in the Netherlands, where crocus species are not native, were from corms brought back in the 1560s from Constantinople by the Holy Roman Emperor's ambassador to the Sublime Porte, Ogier Ghiselin de Busbecq. A few corms were forwarded to Carolus Clusius at the botanical garden in Leiden. By 1620, the approximate date of Ambrosius Bosschaert's painting (illustration, below), new garden varieties had been developed, such as the cream-colored crocus feathered with bronze at the base of the bouquet, similar to varieties still on the market. Bosschaert, working from a preparatory drawing to paint his composed piece spanning the whole of spring, exaggerated the crocus so that it passes for a tulip, but its narrow, grass-like leaves give it away.

328 Crocus sativus L., C. vernus Wulf

Crocus sativus & C. vernus, illustration by Amédée Masclef, from Atlas des plantes de France, 1891

Cueilleuse de safran, fresque, Akrotiri, Gr%C3%A8ce

Saffron gatherers appear in Minoan frescos on the island of Santorini in the Aegean Sea.

Ambrosius Bosschaert, the Elder 03

Composed Bouquet of Spring Flowers, by Ambrosius Bosschaert, circa 1620 (Louvre Museum)

Crocus-angustifolius

Crocus angustifolius (Cloth of gold) from Curtis's Botanical Magazine, 1803

Description

The cup-shaped, solitary, salverform flower tapers off into a narrow tube. Their colors vary enormously, although lilac, mauve, yellow, and white are predominant. The grass-like, ensiform leaf[9] shows generally a white central stripe along the leaf axis. The leaf margin is entire.

A crocus has three stamens, while a similar-looking plant, colchicum, sometimes popularly referred to as "autumn crocus", has six stamens. In addition, crocus have one style, while colchicum have three.[10]

Distribution

Crocuses are distributed across central and southern Europe, North Africa, Middle East, and Central Asia to western China.[1][2][3]

Distribution map of 16 species of genus Crocus in Europe and Asia

Crocus distribution map europe and asia
Crocus distribution map balkan and minor asia

Species

Crocus tommasinianus (Xytram)
Crocus tommasinianus (Section Crocus, Series Verni)
Crocus vernus 1
Crocus vernus subsp. vernus (Section Crocus, Series Verni)
Crocus vernus albiflorus
Crocus vernus subsp. albiflorus (Section Crocus, Series Verni)
Crocus ligusticus1
Crocus ligusticus (Section Crocus, Series Longiflori)
Crocus ochroleucus 1
Crocus ochroleucus (Section Crocus, Series Kotschyani)
Crocus sativus2
Crocus sativus (Section Crocus, Series Crocus)
Crocus mathewii1
Crocus mathewii (Section Crocus, Series Crocus)
Crocus sieberi Tricolor08
Crocus sieberi subsp. sublimis 'Tricolor' (Section Nudiscapus, Series Reticulati)
Crocus speciosus clump2
Crocus speciosus (Section Nudiscapus, Series Speciosi)

The taxonomic classification proposed by Brian Mathew in 1982 was based mainly on three character states:

  • the presence or absence of a prophyll (a basal spathe);
  • the aspect of the style;
  • the corm tunic.

The seven species discovered since then have been integrated into this classification.[11]

Molecular analysis carried out at the University of Copenhagen suggests this classification should be reviewed. In particular, the DNA data suggest there are no grounds for isolating C. banaticus in its own subgenus Crociris, though it is a unique species in the genus. Because it has a prophyll at the base of the pedicel, it therefore would fall within section Crocus, although its exact relationship to the rest of the subgenus remains unclear.

Another anomalous species, C. baytopiorum, should now be placed in a series of its own, series Baytopi. C. gargaricus subsp. herbertii has been raised to species status, as C. herbertii. Perhaps most surprisingly, autumn-flowering C. longiflorus, the type species of series Longiflori (long regarded by Mathew as "a disparate assemblage"), now seems to lie within series Verni. In addition, the position of C. malyi is currently unclear.

DNA analysis and morphological studies suggest further that series Reticulati, Biflori and Speciosi are "probably inseparable". C. adanensis and C. caspius should probably be removed from Biflori; C. adanensis falls in a clade with C. paschei as a sister group to the species of series Flavi; C. caspius appears to be sister to the species of series Orientales.

The study shows "no support for a system of sections as currently defined", although, despite the many inconsistencies between Mathew's 1982 classification and the current hypothesis, "the main assignment of species to the sections and series of that system is actually supported". The authors state, "further studies are required before any firm decisions about a hierarchical system of classification can be considered" and conclude "future re-classification is likely to involve all infrageneric levels, subgenera, sections and series".[12]

Below is the classification proposed by Brian Mathew in 1982, adapted in accordance with the above findings:

A. Section Crocus : species with a basal prophyll
Series Verni: corms with reticulated fibers, spring-flowering (apart from Crocus longiflorus), flowers for the most part without conspicuous outer striping, bracts absent
  • Crocus etruscus Parl.
  • Crocus ilvensis Peruzzi & Carta[13]
  • Crocus kosaninii Pulevic
  • Crocus longiflorus Raf. – Italian crocus (formerly in Series Longiflori)[12]
  • Crocus tommasinianus Herb. – Woodland crocus, Tommasini's crocus
  • Crocus vernus (L.) Hill – Spring crocus, Dutch crocus
    • Crocus vernus subsp. albiflorus (Kit. ex Schult.) Asch. & Graebn.
    • Crocus vernus subsp. vernus
Series Baytopi (new Series): corms with strongly reticulated fibers; leaves numerous, narrowly linear; spring-flowering, bracts absent; anthers extrorsely dehiscent[12]
  • Crocus baytopiorum Mathew (formerly in Series Verni)[12]
Series Scardici: spring-flowering, leaves have no pale stripe on the upper surface
  • Crocus pelistericus Pulevic
  • Crocus scardicus Kos.
Series Versicolores: spring-flowering, corms with tunics, which for the most part have parallel fibers, flowers with conspicuous exterior striping
Series Longiflori: autumn-flowering, yellow anthers, styles much divided
Series Kotschyani: autumn-flowering, anthers white, styles for the most part three-forked
  • Crocus autranii Albov.
  • Crocus gilanicus B. Matthew (discovered in 1973 and named after Gilan province in Iran where it was first found)
  • Crocus karduchorum Kotschy ex Maw
  • Crocus kotschyanus K. Koch – Kotschy's crocus (syn. C. zonatus)
    • Crocus kotschyanus subsp. cappadocicus B.Mathew
    • Crocus kotschyanus subsp. hakkariensis B.Mathew
    • Crocus kotschyanus subsp. kotschyanus
    • Crocus kotschyanus subsp. suworowianus (K.Koch) B.Mathew
  • Crocus ochroleucus Boiss. & Gaill.
  • Crocus scharojanii Ruprecht
    • Crocus scharojanii subsp. scharojanii
    • Crocus scharojanii subsp. lazicus (Boiss.) B.Mathew
  • Crocus vallicola Herb.
Series Crocus: autumn-flowering, anthers yellow, style distinctly three-branched
  • Crocus asumaniae B. Mathew & T. Baytop
  • Crocus cartwrightianus Herb.
  • Crocus hadriaticus Herb.
    • Crocus hadriaticus subsp. hadriaticus
    • Crocus hadriaticus subsp. parnassicus (B.Mathew) B.Mathew
    • Crocus hadriaticus subsp. parnonicus B.Mathew
  • Crocus moabiticus Bornm. & Dinsmore ex Bornm.
  • Crocus mathewii H. Kemdorff & E. Pasche (1994)
  • Crocus naqabensis Al-Eisawi (2001)
  • Crocus oreocreticus B.L. Burtt
  • Crocus pallasii Goldb.
    • Crocus pallasii subsp. dispathaceus (Bowles) B.Mathew
    • Crocus pallasii subsp. haussknechtii (Boiss. & Reut. ex Maw) B.Mathew
    • Crocus pallasii subsp. pallasii
    • Crocus pallasii subsp. turcicus B.Mathew
  • Crocus thomasii Ten.
Position unclear[12]
B. Section Nudiscapus: species without a basal prophyll
Series Reticulati: corm tunic for the most part decidedly covered with reticulated fibers, flower produced in winter or spring, style three-forked or much divided
  • Crocus abantensis T.Baytop & B.Mathew
  • Crocus ancyrensis (Herb.) Maw – Ankara crocus
  • Crocus angustifolius Weston – cloth-of-gold crocus
  • Crocus cancellatus Herb.
    • Crocus cancellatus subsp. cancellatus
    • Crocus cancellatus subsp. damascenus (Herb.) B.Mathew
    • Crocus cancellatus subsp. lycius B.Mathew
    • Crocus cancellatus subsp. mazziaricus (Herb.) B.Mathew
    • Crocus cancellatus subsp. pamphylicus B.Mathew
  • Crocus cvijicii Kos.
  • Crocus dalmaticus Vis.
  • Crocus gargaricus Herb.
  • Crocus herbertii B. Mathew (became a "true" species)[12]
  • Crocus hermoneus Kotschy ex Maw
  • Crocus jablanicensis N. Randj. & V. Randj.
  • Crocus reticulatus Steven ex Adams
    • Crocus reticulatus subsp. hittiticus (T.Baytop & B.Mathew) B.Mathew
    • Crocus reticulatus subsp. reticulatus
  • Crocus robertianus C.D. Brickell
  • Crocus rujanensis Randjel. & D.A. Hill (1990)
  • Crocus sieberi J. Gay – Sieber's crocus, Cretan crocus
    • Crocus sieberi subsp. atticus (Boiss. & Orph.) B.Mathew
    • Crocus sieberi subsp. nivalis (Bory & Chaub.) B.Mathew
    • Crocus sieberi subsp. sieberi
    • Crocus sieberi subsp. sublimis (Herb.) B.Mathew
  • Crocus sieheanus Barr ex B.L. Burtt
  • Crocus veluchensis Herb.
Series Biflori: tunics of corms split into rings at the base, either entire or with toothlike projections, leathery in texture, spring- or late-winter flowering, style three-forked
  • Crocus aerius Herb.
  • Crocus almehensis C.D. Brickell & B. Mathew
  • Crocus biflorus Mill. – silvery crocus, Scotch crocus
    • Crocus biflorus subsp. biflorus
    • Crocus biflorus subsp. adamii (J.Gay) K.Richt.
    • Crocus biflorus subsp. alexandri (Nicic ex Velen.) B. Mathew
    • Crocus biflorus subsp. artvinensis (J.Philippow) B. Mathew
    • Crocus biflorus subsp. atrospermus Kernd. & Pasche
    • Crocus biflorus subsp. caelestis Kernd. & Pasche
    • Crocus biflorus subsp. caricus Kernd. & Pasche
    • Crocus biflorus subsp. crewei (Hook.f.) B. Mathew
    • Crocus biflorus subsp. fibroannulatus Kernd. & Pasche
    • Crocus biflorus subsp. ionopharynx Kernd. & Pasche
    • Crocus biflorus subsp. isauricus (Siehe ex Bowles) B.Mathew
    • Crocus biflorus subsp. leucostylosus Kernd. & Pasche
    • Crocus biflorus subsp. melantherus B. Mathew
    • Crocus biflorus subsp. nubigena (Herb.) B. Mathew
    • Crocus biflorus subsp. pseudonubigena B. Mathew
    • Crocus biflorus subsp. pulchricolor (Herb.) B. Mathew
    • Crocus biflorus subsp. punctatus B.Mathew
    • Crocus biflorus subsp. stridii (Papan. & Zacharof) B.Mathew
    • Crocus biflorus subsp. tauri (Maw) B. Mathew
    • Crocus biflorus subsp. weldenii (Hoppe & Fuernr.) B. Mathew
    • Crocus biflorus subsp. yataganensis Kernd. & Pasche
  • Crocus chrysanthus Herb. – Golden crocus, Snow crocus
    • Crocus chrysanthus subsp. chrysanthus
    • Crocus chrysanthus subsp. multifolius Papan. & Zacharof
  • Crocus cyprius Boiss. & Kotschy
  • Crocus danfordiae Maw
    • Crocus danfordiae subsp. danfordiae
    • Crocus danfordiae subsp. kurdistanicus Maroofi & Assadi
  • Crocus hartmannianus Holmboe
  • Crocus kerndorffiorum Pasche (1993)
  • Crocus leichtlinii (Dewar) Bowles
  • Crocus nerimaniae Yüzbasioglu & Varol (2004)
  • Crocus pestalozzae Boiss.
  • Crocus wattiorum (B. Mathew, 1995) B. Mathew (2000)
  • Crocus demirizianus O.Erol & L.Can (2012)
  • Crocus yakarianus Yıldırım & O.Erol (2013)
Series Speciosi: corm tunic splits into rings at the base, leathery or membranous, foliage after the flowers, autumn-flowering, style much divided
  • Crocus pulchellus Herb. – hairy crocus
  • Crocus speciosus M. Bieb. – Bieberstein's crocus, large purple crocus
    • Crocus speciosus subsp. ilgazensis B.Mathew
    • Crocus speciosus subsp. speciosus
    • Crocus speciosus subsp. xantholaimos B.Mathew
Series Orientales: corm with parallel fibers or lightly reticulated, numerous leaves, spring-flowering, style three-forked
  • Crocus alatavicus Semenova & Reg.
  • Crocus caspius Fischer & Meyer (formerly in Series Biflori)
  • Crocus korolkowii Regel ex Maw – celandine crocus
  • Crocus michelsonii B. Fedtsch.
Series Flavi: tunics of the corms membranous, split into parallel fibers, spring-flowering, styles much divided
  • Crocus adanensis T. Baytop & B. Mathew (formerly in Series Biflori)
  • Crocus antalyensis Mathew
    • Crocus antalyensis subsp. antalyensis
    • Crocus antalyensis subsp. striatus O.Erol & M.Koçyiğit (2010)
    • Crocus antalyensis subsp. gemicii L.Sik & O.Erol (2011)
  • Crocus candidus E.D. Clarke
  • Crocus flavus Weston – Yellow crocus
    • Crocus flavus subsp. flavus
    • Crocus flavus subsp. dissectus T.Baytop & B.Mathew
    • Crocus flavus subsp. sarichinarensis Rukšans
  • Crocus graveolens Boiss. &Reut.
  • Crocus hyemalis Boiss.
  • Crocus olivieri Gray
    • Crocus olivieri subsp. olivieri – Balkan and Turkey
    • Crocus olivieri subsp. balansae (J.Gay ex Baker) B. Mathew – endemic round İzmir, West-Turkey
    • Crocus olivieri subsp. istanbulensis B. Mathew, Istanbul, Turkey.
  • Crocus paschei H. Kerndorff
  • Crocus vitellinus Wahl.
Series Aleppici: tunics of the corms membranous, with split, parallel fibers, foliage produced at the same time as the flowers, fall- or winter-flowering
  • Crocus aleppicus Baker
  • Crocus boulosii Greuter
  • Crocus veneris Tappein ex Poech
Series Carpetani: undersurface of the leaves rounded with grooves, upper surface channeled, spring-flowering, style whitish, obscurely divided
  • Crocus carpetanus Boiss. & Reut.
  • Crocus nevadensis Amo & Campo
Series Intertexti: corm tunic fibrous with fibers interwoven, spring-flowering
  • Crocus fleischeri J.Gay.
Series Laevigatae: corm tunic membranous or splitting into parallel fibers, sometimes leathery, foliage produced at the same time as flowers, autumn-flowering, anthers white, style much divided
IMG 0488-Crocus alatavicus

Crocus alatavicus

Crocus aleppicus 1

Crocus aleppicus

Crocus ancyrensis002

Crocus ancyrensis

Crocus banaticus

Crocus banaticus

Crocus biflorus 03

Crocus biflorus

Crocus cancellatus04

Crocus cancellatus

Crocus carpetanus

Crocus carpetanus

Crocus cartwrightianus %27Albus%2702

Crocus cartwrightianus 'Albus'

Crocus caspius

Crocus caspius

Crocus chrysanthus %27Zwanenburg Bronze%27

Crocus chrysanthus
'Zwanenburg Bronze'

Albertacce Crocus corsicus

Crocus corsicus

Crocus etruscus02

Crocus etruscus 'Zwanenburg'

Crocus goulimyi3

Crocus goulimyi

Crocus graveolens, %C3%87ukurova University Campus, Adana, Turkey - 20060109

Crocus graveolens

Crocus HyemalisTavor1

Crocus hyemalis

Crocus imperati De Jager group 01

Crocus imperati 'De Jager'

Crocus kotschyanus2

Crocus kotschyanus

Crocus laevigatus Fontenayi 03

Crocus laevigatus 'Fontenayi'

Crocus longiflorus5

Crocus longiflorus

Crocus malyi sveti 1

Crocus malyi

Crocus minimus02

Crocus minimus

Crocus nevadensis subsp marcetii FlowerCloseup DehesaBoyaldePuertollano

Crocus nevadensis

Crocus nudiflorus4

Crocus nudiflorus

Crocus olivieri 01

Crocus olivieri

Crocus pallasii 2

Crocus pallasii

Crocus pulchellus02

Crocus pulchellus

Crocus serotinus clusii flower

Crocus serotinus subsp. clusii

Flors alpines al cim de la muntanya de Parcent

Crocus serotinus subsp. salzmannii

W 7592

Crocus scharojanii

Crocus tournefortii Flowers

Crocus tournefortii

Crocus at north of the montagne sainte Victoire by JM Rosier 1

Crocus versicolor

Autumn crocus

Some species, known as "autumn crocus", flower in late summer and autumn, often before their leaves appear. They should not be confused with a different genus of autumn-flowering plants, Colchicum. Autumn-flowering species of crocus include:

  • C. banaticus (syn. C. iridiflorus)
  • C. cancellatus
  • C. goulimyi
  • C. hadriaticus
  • C. kotschyanus (syn. C. zonatus)
  • C. laevigatus
  • C. ligusticus (syn. C. medius )
  • C. niveus
  • C. nudiflorus
  • C. ochroleucus
  • C. pulchellus
  • C. sativus (saffron crocus)
  • C. serotinus
  • C. speciosus
  • C. tournefortii

C. laevigatus has a long flowering period which starts in late autumn or early winter and may continue into February.

Cultivation

About 30 of the species are cultivated, including Crocus sativus for saffron production. The varieties cultivated for decoration mainly represent five species: C. vernus, C. chrysanthus, C. flavus, C. sieberi, and C. tommasinianus. Among the first flowers to bloom in spring, crocuses are popular with gardeners. Their flowering time varies from the late winter C. tommasinianus to the later large hybridized and selected Giant "Dutch crocuses" (C. vernus). Crocus flowers and leaves are protected from frost by a waxy cuticle; in areas where snow and frost occasionally occur in the early spring, it is not uncommon to see early flowering crocuses blooming through a light late snowfall.

Large flowering of purple crocuses

field of flowering purple crocuses

CrocusEABowles

Crocus 'E.A. Bowles',
a C. chrysanthus hybrid

Fr%C3%BChlingsblumen Krokus

Crocus cultivars

Crocus sieberi - tricolor

C. sieberi corms, showing the net-like papery outer covering

Krokusse violett

Purple crocuses with closed flowers

Krokusse im Schnee

Crocuses appearing through the snow

Most crocus species and hybrids should be planted in a sunny position, in gritty (sandy), 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 to 4 cm deep; in heavy soils, a quantity of sharp grit should be worked in to improve drainage.

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 weeds in rock gardens, where they will often appear in the middle of choice, mat-forming alpine plants, and can be difficult to remove.

Similar species

Though some true crocuses bloom with the fall (autumnal) rains, after summer's heat and drought, the name autumn crocus is often used as a common name for Colchicum, which is in its own family (Colchicaceae) in the lily order Liliales, and which has six stamens; it is also known as meadow saffron, though unlike true saffron, the plant is toxic.

The prairie crocus or pasque flower (Pulsatilla patens) belongs to the buttercup family (Ranunculaceae).

Metaphorical use

The financial community sometimes refers to companies or economic sectors that rise early after an economic downturn as "crocuses" in reference to the flower's ability to thrive in the late winter or early spring.[14]

Culture

Crocus or Krokus (Greek: Κρόκος) was a mortal youth who, because he was unhappy with his love affair with Smilax, was turned by the gods into a plant bearing his name, the crocus.

References

  1. ^ a b c Kew World Checklist of Selected Plant Families
  2. ^ a b Altervista Flora Italiana, genere Crocus includes photos plus European distribution maps
  3. ^ a b Innes, C. (1985). The World of Iridaceae: 1–407. Holly Gare International Ltd., Ashington
  4. ^ κρόκος, Henry George Liddell, Robert Scott, A Greek-English Lexicon, on Perseus
  5. ^ OED; Babiniotis dictionary
  6. ^ Tawney, C. H. (1924). The Ocean of Story, chapter 104. p. 13.
  7. ^ "crocus (n.)". etymonline.com.
  8. ^ C. Michael Hogan, "Knossos fieldnotes", Modern Antiquarian (2007)
  9. ^ Ensiform: Having sharp edges and tapering to a slender point, like a sword blade.
  10. ^ A Handbook of Crocus and Colchicum for Gardeners, p. 154, etc.
  11. ^ Gitte Petersen, Ole Seberg, Sarah Thorsøe, Tina Jørgensen & Brian Mathew: "A phylogeny of the genus Crocus (Iridaceae) based on sequence data from five plastid regions." Taxon, 57(2), 2008, pp. 487–499. JSTOR 25066017.
  12. ^ a b c d e f Brian Mathew, Gitte Petersen & Ole Seberg, A reassessment of Crocus based on molecular analysis, The Plantsman (N.S.) Vol 8, Part 1, pp. 50–57, March 2009
  13. ^ Peruzzi Lorenzo, Carta Angelino. 2011 "Crocus ilvensis sp. nov. (sect. Crocus, Iridaceae), endemic to Elba Island (Tuscan Archipelago, Italy)", Nordic Journal of Botany, 29(1): 6–13. doi:10.1111/j.1756-1051.2010.01023.x
  14. ^ Example of Metaphorical Use

Bibliography

External links

This page is based on a Wikipedia article written by authors (here).
Text is available under the CC BY-SA 3.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.