Adoxa moschatellina

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Adoxa moschatellina
Adoxa moschatellina01.jpg
Status TNC G5.svg
Secure  (NatureServe) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Dipsacales
Family: Adoxaceae
Genus: Adoxa
Species:
A. moschatellina
Binomial name
Adoxa moschatellina
L.

Adoxa moschatellina, moschatel, is a species of flowering plant in the family Adoxaceae which has a highly distinctive inflorescence. This herbaceous perennial grows in relatively sunny places in old woodland, such as the edges of streams, and in shady places in open habitats such as rock crevices in limestone pavements. It has a limited ability to spread by seed, but expands vegetatively via its long stolons. It is a widespread but generally uncommon plant which is not considered to be threatened within its natural range.

Contents

Description

Moschatel is a patch-forming perennial about 10-15 cm (6 in.) tall, with pale green foliage and a delicate appearance. It has swollen, fleshy rhizomes as well as long, slender stolons. The aerial stems are produced in early spring (typically around the end of February in England), long before the woodland canopy forms. They are slender, erect and unbranched, typically with two basal leaves on long petioles, which are almost as long as the stem, and two opposite leaves at the top, which have short petioles that are expanded towards the base. There are no stipules. The whole plant is entirely glabrous (hairless). [2] [3]

The basal leaves are a dull green above, silvery and succulent below, and dotted with stomata only on the undersides. The basal leaves are ternate (i.e. divided into 3 lobes) or twice ternate, and up to 5 cm long, whereas the stem leaves have 2 or 3 lobes, with blades up to 3 cm long.

At the top of the stem, on a peduncle which is at least as long as the stem itself, at flowering, is an inflorescence that is unique to this genus and highly distinctive. It consists of a cubical cluster of 5 green flowers, about 0.5 cm in diameter, with four 5-petalled flowers on the sides of the cube and one 4-petalled flower at the top. They are said to smell faintly of musk, especially "towards the evening when the dew falls." [4] The lateral flowers each have 5 stamens (which are deeply divided so it looks as if there are 10) and 2-5 styles. The terminal flower has only 4, similarly divided, stamens. Below the corolla, the calyx consists of 3 lobes in the lateral flowers and just 2 in the terminal one.

The lateral flowers usually have 5 petals Adoxa moschatellina kz35.jpg
The lateral flowers usually have 5 petals

Fruits are formed in April to May in England. Each flower can develop 2-5 fruits, which are rather dry drupes, 4.5 - 5.55 mm in diameter, partially encased by the expanded, fleshy calyx. At this time the peduncle expands and spirals, bending towards to ground to deposit the fruits close to the parent plant. Fruiting is uncommon, as reproduction is mainly vegetative, through the stolons and rhizomes. [2] [3] [5]

Moschatel spreads more rapidly by its long stolons than by seed Adoxa moschatellina kz29.jpg
Moschatel spreads more rapidly by its long stolons than by seed
The seeds are deposited onto the ground close to the parent plant Adoxa moschatellina sl15.jpg
The seeds are deposited onto the ground close to the parent plant

Taxonomy

Moschatel is a highly distinctive plant, owing to its curious arrangement of flowers. For many years it had been considered the only species in its plant family, the Adoxaceae. [5] However, in 2018 a second species of Adoxa was discovered in China [6] and, meanwhile, cytological [7] and genetics studies have shown that family should include the elders and viburnums. [8]

Plants can have short, thick rhizomes and long, slender stolons that appear to have hollow centres Adoxa moschatellina sl3.jpg
Plants can have short, thick rhizomes and long, slender stolons that appear to have hollow centres

Its name was given by Linnaeus in 1753, in Species Plantarum (p. 367) and it has received a few synonyms since then, including Moscatella adoxa (Scop., 1771) and Moschatellina fumariifolia (Bubani, 1899), but these have not stuck. [9]

Its chromosome number is 2n = 36. [8]

Several varieties and subspecies have been described: var. insularis(Nepomn.) S.Y. Li & Z.H. Ning occurs in eastern Russia; and subsp. cescaePeruzzi & N.G. Passal is found in southern Italy. It is a triploid (2n = 54) with smaller pollen and stomata. [10] Other plants are, by default, subsp. moschatellina, although this name has not been formally published. [9] It is not known to hybridise with any other species. [11]

The word "Adoxa" comes from the Ancient Greek δόξᾰ (doxa), meaning glory or splendour and the Latin prefix a-, which means "not" or "without", and refers to its humble size and appearance. [12] The specific epithet moschatellina and the common name moschatel come from the Latin word for musk, which refers to the scent produced by male musk deer, as it is apparently similar to the smell of the flowers. [2]

Other common names include five-faced bishop, [13] hollowroot, muskroot, townhall clock, [14] tuberous crowfoot and Good Friday plant. The name hollowroot presumably comes from the way the stolons (not actually the roots) have a dark core and so have the appearance, in a cut section, of being hollow.

Distribution and status

Adoxa moschatellina has a boreal, circumpolar distribution in Europe, Asia and North America, and just extending into Morocco in North Africa. [15] It is not established as an introduced species beyond its natural range, [16] except possibly in Ireland. [17] It is generally not considered to be rare or threatened: in the United States [1] it is classified as "secure" and, while it has not been assessed internationally by the IUCN, [18] many European countries classify it as "Least Concern". [19] [20]

It is widespread in most parts of Britain but not common, being generally restricted to small patches in areas of ancient woodland. It becomes scarce in the north and west, where the soils are too acid for it, and parts of eastern England where there has been little woodland cover. [17] It is absent from Ireland except in a couple of places where it was probably introduced, deliberately or accidentally. [17]

Habitat and ecology

Puccinia adoxae telia Puccinia adoxae kz1.jpg
Puccinia adoxae telia
Puccinia argentata galls on a plant of moschatel in Germany Puccinia impatientis on Adoxa moschatellina (41019928324).jpg
Puccinia argentata galls on a plant of moschatel in Germany

Moschatel grows in woodland and scrub, typically in places with fairly light shade, such as the edges of paths or alongside streams and rivers. Its Ellenberg values in Britain are L = 4, F = 5, R = 6, N = 5, and S = 0, [21] which show that it favours lower than average levels of light and nutrients, and higher than average moisture and alkalinity. It is found in deciduous woods under ash, pedunculate oak, sessile oak, hornbeam or beech trees, typically towards the bottom of any slope, where the soil is damper and more base-rich, amongst dog's mercury and wood anemone. [22] This habitat is, under the British National Vegetation Classification, considered to be ash wood, W8 in the lowlands and W9 in the uplands. [23] It is also recorded in elder scrub (W6d) along riverbanks. [24] In the Scottish Highlands and Snowdonia, it occurs in juniper scrub (W19), [25] and in shady nooks amongst boulders in upland heaths and pillow lavas (on Cadair Idris). [22]

It is a spring-flowering species which dies back after flowering in May or June. The seeds are deposited on the ground close to the parent plant, thus limiting its ability to spread. This lack of dispersal capacity helps to account for it being largely restricted to ancient woodland, although it is known to establish well in new sites if transported there manually. Spread is more facilitated more by the rhizomes and stolons than by seed production. [5] [24]

In Scotland it is recorded as high as 1065 m on Ben Lawers, and in England up to 760 m at Knock Fell. [26]

The rather plain flowers are pollinated by flies and nocturnal moths which do not rely on colour to pollinate plants. [27]

The seed leaves are simple and almost circular. Adoxa moschatellina kz20.jpg
The seed leaves are simple and almost circular.

Insect associations with moschatel appear to be rare. The larvae of two species of sawfly are known to feed on this plant in Britain: Paracharactus gracilicornis(Zaddach, 1859) and Sciapteryx consobrina(Klug, 1816). [28] [29]

In Europe, moschatel is often infected with the smut Puccinia adoxaeR. Hedw., which produces small black telia (blisters) on the stems and leaves. [30] Puccinia albescens(Grev.) Plowr. and P. argentata(Schultz) G. Winter (syn. P. impatientis) make whitish galls as well as black telia. [31] [32] [33] More rarely, it can be parasitized by Melanotaenium adoxae , which produces yellow-white blisters. [34] [35]

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References

  1. 1 2 "NatureServe Explorer - Adoxa moschatellina". NatureServe Explorer Adoxa moschatellina. NatureServe. 2022-06-22. Retrieved 22 Jun 2022.
  2. 1 2 3 Sell, Peter; Murrell, Gina (2006). Flora of Great Britain and Ireland, vol 4. Cambridge: Cambridge University Press.
  3. 1 2 Poland, John; Clement, Eric (2009). The Vegetative Key to the British Flora. Southampton: John Poland. ISBN   978-0-9560144-0-5.
  4. ↑ Grieve, Maud (1931). A Modern Herbal. New York: Dover Publications Inc. ISBN   0-486-22798-7.
  5. 1 2 3 Crawley, M.J. (2005). The Flora of Berkshire. Harpenden: Brambleby Books. ISBN   0-9543347-4-4.
  6. ↑ Plants of the World Online. "Adoxa corydalifolia (C.Y.Wu, Z.L.Wu & R.F.Huang) Christenh. & Byng" . Retrieved 31 March 2023.
  7. ↑ Benko-Iseppon, Ana Maria; Morawetz, Wilfried (2000). "Viburnales: cytological features and a new circumscription". Taxon. 49 (1): 5–16. doi:10.2307/1223927. JSTOR   1223927.
  8. 1 2 Stace, C.A. (2019). New Flora of the British Isles. Suffolk. ISBN   978-1-5272-2630-2.{{cite book}}: CS1 maint: location missing publisher (link)
  9. 1 2 Global Biodiversity Information Facility. "Adoxa moschatellina L." Retrieved 31 March 2023.
  10. ↑ Peruzzi, L.; Passalacqua, N.G. (2008). "On a new subspecies of Adoxa moschatellina (Adoxaceae), apoendemic in Calabria (S Italy)". Nordic Journal of Botany. 24 (3): 249–256. doi:10.1111/j.1756-1051.2004.tb00838.x.
  11. ↑ Stace, C.A.; Preston, C.D.; Pearman, D.A. (2015). Hybrid Flora of the British Isles. Bristol: Botanical Society of Britain and Ireland. ISBN   978-0-901158-48-2.
  12. ↑ Leighton, W.A. (1841). A Flora of Shropshire. London: John van Voorst.
  13. ↑ Collins Dictionary entry
  14. ↑ "Wessex Wanderings: Local parks and woodlands in Spring". Psophis.blogspot.co.uk. 2016-04-30. Retrieved 2017-04-09.
  15. ↑ Plants of the World Online. "Adoxa moschatellina L." Retrieved 6 April 2023.
  16. ↑ Global Biodiversity Information Facility. "Adoxa moschatellina L." Retrieved 6 April 2023.
  17. 1 2 3 "Adoxa moschatellina". Online Atlas of the British and Irish Flora. Botanical Society of Britain and Ireland and Biological Records Centre. Retrieved 23 March 2020.
  18. ↑ European Environment Agency. "Adoxa moschatellina L." Retrieved 6 April 2023.
  19. ↑ Cheffings, C.M.; Farrell, L. (2005). The Vascular Plant Red Data List for Great Britain. Peterborough: Joint Nature Conservation Committee.
  20. ↑ Inventaire National du Patrimoine Naturel. "Adoxa moschatellina L." Retrieved 6 April 2023.
  21. ↑ Hill, M.O.; Mountford, J.O.; Roy, D.B.; Bunce, R.G.H. (1999). Ellenberg's indicator values for British plants. ECOFACT Volume 2. Technical Annex (PDF). Institute of Terrestrial Ecology. ISBN   1870393481 . Retrieved 29 May 2017.
  22. 1 2 Tansley, A.G. (1949). The British Islands and their Vegetation. London: Cambridge University Press.
  23. ↑ Graham, G.G. (1988). The Flora and Vegetation of County Durham. Durham County Conservation Trust. ISBN   0-905362-02-0.
  24. 1 2 Lockton, Alex; Whild, Sarah (2015). The Flora and Vegetation of Shropshire. Montford Bridge: Shropshire Botanical Society.
  25. ↑ Rodwell, J.S. (1991). British Plant Communities, vol. 1: woodlands and scrub. Cambridge: Cambridge University Press.
  26. ↑ Pearman, D.A. "Altitudinal Limits of British Plants, 2021".
  27. ↑ "Adoxaceae - Town-hall Clock". Cronodon. Retrieved 23 March 2020.
  28. ↑ Biological Records Centre. "Database of Insects and their Food Plants" . Retrieved 7 April 2023.
  29. ↑ The Sawflies (Symphyta) of Britain and Ireland (30 November 2019). "Sciapteryx consobrina (Klug, 1816)" . Retrieved 7 April 2023.
  30. ↑ Plant Parasites of Europe. "Puccinia adoxae Hedwig, 1805" . Retrieved 6 April 2023.
  31. ↑ Redfern, Margaret; Shirley, Peter (2002). "British Plant Galls". Field Studies. 10: 207–531.
  32. ↑ Plant Parasites of Europe. "Puccinia albescens Greville, 1889" . Retrieved 6 April 2023.
  33. ↑ National Biodiversity Network. "Puccinia argentata (Schultz) G. Winter" . Retrieved 7 April 2023.
  34. ↑ Negrean, G.; Constantinescu, O. (1997). "Melanotaenium adoxae revisited". Mycotaxon. 61: 359–362.
  35. ↑ Plant Parasites of Europe. "Melanotaenium adoxae (Brefeld), Ito, 1935" . Retrieved 6 April 2023.
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