Muscari is a genus of perennial bulbous plants native to Eurasia that produce spikes of dense, most commonly blue, urn-shaped flowers resembling bunches of grapes in the spring. The common name for the genus is grape hyacinth (a name which is also used for the genera Leopoldia and Pseudomuscari). Other common names are baby's breath and bluebell, although these are also used for other plants, particularly Gypsophila and Hyacinthoides (respectively). A number of species of Muscari are used as ornamental garden plants.
The genus Muscari originated in the Old World, including the Mediterranean basin, central and southern Europe, northern Africa, western, central and south-western Asia. It has become naturalized elsewhere, including northern Europe and the United States.
Brian Mathew says that many species of Grape Hyacinths, including not only Muscari but also the related Leopoldia and Pseudomuscari, are difficult to distinguish. They usually have one or more narrow leaves which arise from a bulb. The flowers appear in the spring and form a spike or raceme, being held in a close or loose spiral around a central stalk. The flowers often become less tightly spaced as the flower matures. The flower colour varies from pale blue to a very dark blue, almost black in some cases (albino forms are also known). In some species the upper flowers may be of a different colour and shape to the lower flowers. Individual flowers are composed of six fused tepals forming a spherical to obovoid shape, constricted at the end to form a mouth around which the ends of the tepals show as small lobes or "teeth", which may be of a different colour to the rest of the tepal.
The use of muscari as part of the name of at least some of the species included in the modern genus can be traced back to Carolus Clusius in 1601, long before the modern rules of botanical nomenclature were established. In 1753, Carl Linnaeus used the name Hyacinthus muscari for the plant now called Muscari racemosum. In 1754, Philip Miller formally established the genus Muscari according to modern rules of nomenclature. The name muscari comes from the Greek muschos, musk, referring to the scent.
Classified in the family Asparagaceae, subfamily Scilloideae, the genus was formerly placed in the Liliaceae as a member of the Hyacintheae tribe. There are about forty species. The genus was at one time divided into four groups or subgenera: Botryanthus, Pseudomuscari, Leopoldia and Muscarimia. Pseudomuscari and Leopoldia are now treated as separate genera. The genus Muscari is now more or less equivalent to the Botryanthus group.
A complication in splitting up the broad genus is that Miller's original Muscari included representatives of at least three of the new genera. Which one should retain the name Muscari would normally be decided by where the type species was placed; however Miller did not designate a type species, although the etymology of the genus name points to the species Linnaeus called Hyacinthus muscari (now Muscari racemosum).
The Muscarimia group are retained in Muscari by the Kew World Checklist of Selected Plant Families. Two species have been placed in this group: M. macrocarpum and M. racemosum (under the name M. muscarimi).
- Muscari adilii M.B.Güner & H.Duman
- Muscari albiflorum (Täckh. & Boulos) Hosni
- Muscari alpanicum Schchian
- Muscari anatolicum Cowley & Özhatay
- Muscari armeniacum Leichtlin ex Baker
- Muscari aucheri (Boiss.) Baker
- Muscari babachii Eker & Koyuncu
- Muscari baeticum Blanca
- Muscari botryoides (L.) Mill.
- Muscari bourgaei Baker
- Muscari cazorlanum C.Soriano & al.
- Muscari commutatum Guss.
- Muscari discolor Boiss. & Hausskn.
- Muscari dolichanthum Woronow & Tron
- Muscari fertile Ravenna
- Muscari filiforme Ravenna
- Muscari hermonense Ravenna
- Muscari hierosolymitanum Ravenna
- Muscari kerkis Karlén
- Muscari kurdicum Maroofi
- Muscari latifolium J.Kirk.
- Muscari lazulinum Ravenna
- Muscari longistylum (Täckh. & Boulos) Hosni
- Muscari macbeathianum Kit Tan
- Muscari macrocarpum Sweet
- Muscari massayanum C.Grunert
- Muscari matritensis Ruíz Rejón & al.
- Muscari microstomum P.H.Davis & D.C.Stuart
- Muscari mirum Speta
- Muscari neglectum Guss. ex Ten. [syn. Muscari racemosum (L.) Medik. nom. illeg.]
- Muscari olivetorum Blanca
- Muscari parviflorum Desf.
- Muscari pulchellum Heldr. & Sart.
- Muscari racemosum Mill. [syn. Muscari muscarimi Medik. nom. illeg., Muscarimia muscari (L.) Losinsk., Muscari moschatum Willd.]
- Muscari salah-eidii (Täckh. & Boulos) Hosni
- Muscari sandrasicum Karlén
- Muscari sivrihisardaghlarensis Yild. & B.Selvi
- Muscari spreizenhoferi (Heldr. ex Osterm.) H.R.Wehrh.
- Muscari stenanthum Freyn
- Muscari tavoricum Ravenna
- Muscari turcicum Uysal et al.
- Muscari vuralii Bagci & Dogu
The names of some of the species are somewhat confused, especially in the horticultural literature. Thus the name M. racemosum is commonly found as an incorrect synonym for M. neglectum, with M. muscarimi or M. moschatum being used for the true M. racemosum.
Species now allocated to other genera 
- Muscari azureum Fenzl, see Pseudomuscari azureum (Fenzl) Garbari & Greuter
- Muscari comosum (L.) Mill., see Leopoldia comosa (L.) Parl.
- Muscari paradoxum (Fisch. & C.A.Mey.) K.Koch, see Bellevalia paradoxa (Fisch. & C.A.Mey.) Boiss.
Some species are among the earliest garden flowers to bloom in the spring. They are planted as bulbs and tend to multiply quickly (naturalise) when planted in good soils. They prefer well drained sandy soil, that is acid to neutral and not too rich. Naturally found in woodlands or meadows, they are commonly cultivated in lawns, borders, rock gardens and containers. They require little feeding or watering in the summer, and sun or light shade.
- M. 'Pink Surprise' was described as "new" in 2011; it has pale pink flowers – a previously unknown colour in the genus – on 10–15 cm (4–6 in) stems.
- Britton, Nathaniel Lord & Brown, Addison (1896), "13. Muscari Mill. Gard. Diet. Abr. Ed. 4. 1754", An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol. 1, New York: Scribner, retrieved 2012-12-27
- Taylor, Norman (1996). One Thousand One Questions Answered about Flowers. Mineola, NY: Courier Dover. p. 263. ISBN 0486290999.
- WCSP (2011), World Checklist of Selected Plant Families, The Board of Trustees of the Royal Botanic Gardens, Kew, retrieved 2011-11-14, search for "Muscari"
- Mathew, Brian (1987), The Smaller Bulbs, London: B.T. Batsford, ISBN 978-0-7134-4922-8, pp. 124–130
- Garbari, F. & Greuter, W. (1970), "On the Taxonomy and Typification of Muscari Miller (Liliaceae) and Allied Genera, and on the Typification of Generic Names", Taxon 19 (3): 329–335, doi:10.2307/1219056
- WCSP (2011), World Checklist of Selected Plant Families, The Board of Trustees of the Royal Botanic Gardens, Kew, retrieved 2011-11-14, search for "Muscari racemosum"
- Hyam, R. & Pankhurst, R.J. (1995), Plants and their names : a concise dictionary, Oxford: Oxford University Press, ISBN 978-0-19-866189-4, p. 330
- Stevens, P.F. (2001 onwards), Angiosperm Phylogeny Website: Asparagales: Scilloideae
- WCSP (2011), World Checklist of Selected Plant Families, The Board of Trustees of the Royal Botanic Gardens, Kew, retrieved 2011-11-14, search for "Pseudomuscari" or "Leopoldia"
- See, e.g., Mathew 1987
- World Checklist
- World Checklist
- Anon. (October 2011), "Plant forum: new and interesting plants", The Garden 136 (10): 11
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