Galanthus

Galanthus
Common Snowdrop
Scientific classification
Kingdom: Plantae
clade: Angiosperms
clade: Monocots
Order: Asparagales
Family: Amaryllidaceae
Subfamily: Amaryllidoideae
Genus: Galanthus
L.
Species

G. alpinus
G. angustifolius
G. cilicicus
G. fosteri
G. elwesii
G. gracilis
G. ikariae
G. koenenianus
G. krasnovii
G. lagodechianus
G. nivalis
G. peshmenii
G. platyphyllus
G. plicatus
G. reginae-olgae
G. rizehensis
G. transcaucasicus
G. trojanus
G. woronowii

Galanthus (Snowdrop; Greek gála "milk", ánthos "flower") is a small genus of about 20 species of bulbous herbaceous plants in the Amaryllis family, subfamily Amaryllidoideae.[1] Most flower in winter, before the vernal equinox (21 March in the Northern Hemisphere), but certain species flower in early spring and late autumn.

Snowdrops are sometimes confused with their relatives, snowflakes, which are Leucojum and Acis species; see below.

Contents

Ecology

Distribution

Galanthus nivalis is the best-known and most widespread representative of the genus Galanthus. It is native to a large area of Europe, stretching from the Pyrenees in the west, through France and Germany to Poland in the north, Italy, Northern Greece, Ukraine, and European Turkey. It has been introduced and is widely naturalised elsewhere.[2] Although it is often thought of as a British native wild flower, or to have been brought to the British Isles by the Romans, it was probably introduced around the early sixteenth century and is currently not a protected species in the UK.[3]

Most other Galanthus species are from the eastern Mediterranean, though several are found in southern Russia, Georgia and Azerbaijan.[4] Galanthus fosteri comes from Jordan, Lebanon, Syria, Turkey and maybe Israel.[5]

Conservation

Some snowdrop species are threatened in their wild habitats, and in most countries it is now illegal to collect bulbs from the wild. Under CITES regulations, international trade in any quantity of Galanthus, whether bulbs, live plants or even dead ones, is illegal without a CITES permit. This applies to hybrids and named cultivars as well as species. CITES does, however, allow a limited trade in wild-collected bulbs of just three species (G. nivalis, G, elwesii and G. woronowii) from Turkey and Georgia.[6]

Description

All species of Galanthus are perennial, herbaceous plants which grow from bulbs. Each bulb generally produces just two or three linear leaves and an erect, leafless scape (flowering stalk), which bears at the top a pair of bract-like spathe valves joined by a papery membrane. From between them emerges a solitary, pendulous, bell-shaped white flower, held on a slender pedicel. The flower has no petals: it consists of six tepals, the outer three being larger and more convex than the inner series. The six anthers open by pores or short slits. The ovary is three-celled, ripening into a three-celled capsule. Each whitish seed has a small, fleshy tail (elaiosome) containing substances attractive to ants which distribute the seeds.[7] The leaves die back a few weeks after the flowers have faded.

The inner flower segments are usually marked with a green, or greenish-yellow, bridge-shaped mark over the small "sinus" (notch) at the tip of each tepal.

An important feature which helps to distinguish between species (and to help to determine the parentage of hybrids) is their "vernation" (the arrangement of the emerging leaves relative to each other). This can be "applanate", "supervolute" or "explicative". In applanate vernation the two leaf blades are pressed flat to each other within the bud and as they emerge; explicative leaves are also pressed flat against each other, but the edges of the leaves are folded back or sometimes rolled; in supervolute plants one leaf is tightly clasped around the other within the bud and generally remains at the point where the leaves emerge from the soil.[8]

Cultivation and uses

Propagation

Propagation is by offset bulbs, either by careful division of clumps in full growth ("in the green"), or removed when the plants are dormant, immediately after the leaves have withered; or by seeds sown either when ripe, or in spring. Professional growers and keen amateurs also use such methods as "twin-scaling" to increase the stock of choice cultivars quickly.

Active substances

It was suggested by Duvoisin in 1983 that the mysterious magical herb moly that appears in Homer's Odyssey is actually snowdrop. An active substance in snowdrop is called galantamine, which, as anticholinesterase, could have acted as an antidote to Circe's poisons.[9] Galantamine (or galanthamine) can be helpful in the treatment of Alzheimer's disease, though it is not a cure; the substance also occurs naturally in daffodils and other narcissi.

Snowdrop gardens

Celebrated as a sign of spring, snowdrops can form impressive carpets of white in areas where they are native or have been naturalised. These displays may attract large numbers of sightseers. Several gardens open specially in February for visitors to admire the flowers. Sixty gardens took part in Scotland's first Snowdrop Festival (1 Feb–11 March 2007).[10] Several gardens in England open during snowdrop season for the National Gardens Scheme (NGS) (see their website for up-to-date details).

There are a number of snowdrop gardens in England, Scotland, and Ireland.[11]

England

Scotland

Ireland

Subdivisions

Species

Notable species include:

Cultivars

There are numerous single- and double-flowered cultivars of Galanthus nivalis, and also of several other Galanthus species, particularly G. plicatus and G. elwesii. There are also many hybrids between these and other species (there are more than 500 cultivars described in Bishop, Davis & Grimshaw's book, plus lists of many cultivars that have now been lost, and others not seen by the authors). They differ particularly in the size, shape and markings of the flower, the period of flowering, and other characteristics, mainly of interest to the keen (even fanatical) snowdrop collectors, known as "galanthophiles", who hold meetings where the scarcer cultivars change hands.[14] Double-flowered cultivars and forms, such as the extremely common Galanthus nivalis f. pleniflorus 'Flore Pleno', may be less attractive to some people but they can have greater visual impact in a garden setting.

A list of Irish cultivars can be found here [3]

Similar genera

Snowdrops are sometimes confused with their relatives, snowflakes, Leucojum and Acis species. Leucojums are much larger and flower in spring (or early summer, depending on the species), with all six tepals in the flower being the same size, though it should be noted that some "poculiform" (goblet- or cup-shaped) Galanthus can have inner segments similar in shape and length to the outer ones.

Gallery

Media

See also

References

Notes

  1. ^ Stevens, P.F. (2001 onwards), Angiosperm Phylogeny Website: Asparagales: Amaryllidoideae, http://www.mobot.org/mobot/research/apweb/orders/asparagalesweb.htm#AllAma 
  2. ^ Davis, Aaron (1999). The genus Galanthus. Portland, Oregon: Timber Press. pp. 95–96. ISBN 0881924318. 
  3. ^ Bishop, Matt; Aaron Davis, John Grimshaw (January 2002). SNOWDROPS A Monograph of Cultivated Galanthus. Griffin Press. pp. 17. ISBN 0954191609. 
  4. ^ Bishop, Davis & Grimshaw (2002) pp17–57
  5. ^ Bishop, Davis & Grimshaw (2002) p40
  6. ^ Bishop, Davis & Grimshaw (2002) pp341–343
  7. ^ Bishop, Davis & Grimshaw (2002) p7
  8. ^ Bishop, Davis & Grimshaw (2002) pp1–2
  9. ^ Plaitakis A, Duvoisin RC, Homer's moly identified as Galanthus nivalis L.: physiologic antidote to stramonium poisoning. Clin Neuropharmacol. 1983 Mar; 6(1):1-5. Abstract
  10. ^ "VisitScotland.com: Snowdrop Festival". Archived from the original on 3 March 2007. http://web.archive.org/web/20070303112955/http://white.visitscotland.com/snowdrops/. Retrieved 11 March 2007. 
  11. ^ "Great British Gardens: Snowdrops and Snowdrop Gardens 2007". http://www.greatbritishgardens.co.uk/snowdrops.htm. Retrieved 11 March 2007. 
  12. ^ "RHS Event Finder: Snowdrops at Primrose Hill". Archived from the original on 29 August 2007. http://web.archive.org/web/20070829195329/http://www.rhs.org.uk/rhseventfinder/EventFinder2.asp?ID=5012379. Retrieved 11 March 2007. 
  13. ^ Bishop, Davis & Grimshaw (2002) p17
  14. ^ Bishop, Davis & Grimshaw (2002) p329
  15. ^ Text of, and brief commentary on, Seamus Heaney's Mid-term Break

Further reading