Volvariella surrecta

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Volvariella surrecta
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Pluteaceae
Genus: Volvariella
Species:
V. surrecta
Binomial name
Volvariella surrecta
(Knapp) Singer (1951)
Synonyms[1][2]
  • Agaricus surrectus Knapp (1829)
  • Agaricus loveianus
    Berk.
    (1836)
  • Volvariopsis loweiana (Berk.)
    Murrill
    (1917)
  • Volvaria hypopithys subsp. loveiana (Berk.) Konrad & Maubl. (1924)
  • Volvaria surrecta (Knapp)
    Ramsb.
    (1942)
Volvariella surrecta
View the Mycomorphbox template that generates the following list
Gills on hymenium
Cap is convex or flat
parasitic
Edibility is inedible

Volvariella surrecta, commonly known as the piggyback rosegill, is an agaric fungus in the family Pluteaceae. Although rare, the species is widely distributed, having been reported from Asia, North America, Northern Africa, Europe, and New Zealand. The fungus grows as a parasite on the fruit bodies of other gilled mushrooms, usually Clitocybe nebularis. V. surrecta mushrooms have white or greyish silky-hairy caps up to 8 cm (3.1 in) in diameter, and white gills that turns pink in maturity. The stipe, also white, is up to 9 cm (3.5 in) long, and has a sack-like volva at its base.

Taxonomy

Knapp's 1829 drawing of Agaricus surrectus

The species was first mentioned in scientific literature as Agaricus surrectus by English botanist

William Alphonso Murrill proposed a new name combination for the species based on Berkeley's name, Volvariopsis loweiana.[6] In 1942, John Ramsbottom discovered Knapp's image and description of the fungus, and realizing it referred to the same species as Berkeley's Agaricus loveianus, made the new combination Volvaria surrecta.[7] Rolf Singer transferred it to the genus Volvariella in 1951, giving it the name by which it is known presently.[8]

Molecular analysis of DNA sequences suggests that V. surrecta belongs to the Volvariella pusilla group—a grouping of related Volvariella species that produce small, white fruit bodies. In this analysis, V. surrecta formed a subclade with V. hypopithys.[9] Almost 90 years earlier, Paul Konrad and André Maublanc recognized the relatedness of these species, and proposed that V. surrecta should be considered a subspecies of V. hypopithys.[2][10]

The specific epithet surrecta is Latin for "to arise". Berkeley's epithet loveianus honors British naturalist and Reverend Richard Thomas Lowe.[5] The mushroom is commonly known as the piggyback rosegill.[11]

Description

The cap has a silky surface, with a yellowish to brownish center.

The fruit bodies of V. surrecta have caps that are initially ovoid (egg-shaped. Later they become bell-shaped or convex before flattening; reaching diameters of 2.5–8 cm (1.0–3.1 in). The cap sometimes has a shallow umbo, although the presence of this character is not consistent. The cap surface is dry and covered with long, silky hairs; the color is white to light gray, with a yellowish or brownish center. The gills are free from attachment to the stipe and are packed close together. They are initially white, later becoming pink.[12] There are many lamellulae (short gills that do not extend fully from cap margin to the stipe) interspersed between the gills.[13] The stipe is 4–9 cm (1.6–3.5 in) long by 4–12 mm (0.16–0.47 in) thick, and roughly equal in width throughout the length or somewhat thicker at the base. Its color is white to light gray, and the stipe surface is appressed-fibrillose, with a pruinose coating near the apex. The white volva measures 1.3–2.5 cm (0.5–1.0 in) high and 0.6–1.3 cm (0.2–0.5 in) broad, and has a lobed margin.[12] The mushroom is not edible.[11]

The color of the

cystidia on the gill face) are fusoid-ventricose (distinctly enlarged in the middle and tapered toward both ends), sometimes with an elongated neck. The cheilocystidia (cystidia on the gill edge) are also fusoid-ventricose with a neck that is sometimes short and bulbous; they measure 25–50 by 6–20 μm. The hyphae do not have clamp connections.[12]

Similar species

Because of its occurrence on the fruit bodies of other agarics, V. surrecta is unlikely to be confused with other mushrooms. Other parasitic mushrooms include

leaf litter.[11]

Habitat and distribution

Clitocybe nebularis is a common host for V. surrecta.

Volvariella surrecta grows parasitically on the fruit bodies of Clitocybe species, usually C. nebularis,[12] although it has been reported growing on Tricholoma species,[16] as well as Melanoleuca brevipes.[17] The mushrooms grow in clusters, and fruit in the summer and autumn.[18] The host mushroom is sometimes malformed and assumes an irregular appearance.[19] In an early publication, Charles Bagge Plowright commented "Berkeley's figure ... is rather misleading. So is that given by Knapp under the name Agaricus surrectus ..., inasmuchas they show the Agaric (A. nebularis), upon which it is parasitic, in a very robust condition. In my specimen the host (A. nebularis) was quite sodden and collapsed so as to be practically unrecognisable unless one had known what species to expect."[20]

Volvariella surrecta is a rare species, even though its major host is quite common; the conditions required for the parasite to produce fruit bodies are not well known.

saprobe.[21] V. surrecta has been found on its host in several different habitat types, including birch woodlands, pine plantations, scrub, thickets of small trees or shrubs beside roads, and under brambles. No definite preference for soil type has been determined, having been found in sands, clay, gravels, and peat.[5] In 1867, Worthington George Smith reported that he had successfully cultivated the species by partially burying fruit bodies under water-soaked rotting fir leaves that were placed in a bell-glass in a warm room. According to his account, a white mycelium grew over the leaves and eventually formed small white pins (immature, undifferentiated fruit bodies) that grew into fully formed mushrooms about two weeks after starting.[22]

The geographical distribution of the fungus includes North America north of Mexico, Northern Africa, Europe, New Zealand,

Amur region of Russia,[23] India,[24] and Korea[25]
).

References

  1. ^ "Volvariella surrecta (Knapp) Singer 1951". MycoBank. International Mycological Association. Retrieved 2012-07-09.
  2. ^ a b "Volvaria hypopithys subsp. loveiana (Berk.) Konrad & Maubl. 1924". MycoBank. International Mycological Association. Retrieved 2012-07-09.
  3. doi:10.5962/bhl.title.26335
    .
  4. ^ Berkeley MJ (1836). The English Flora: Fungi. Vol. 5. p. 104.
  5. ^
    doi:10.1016/S0269-915X(98)80079-7
    .
  6. ^ Murrill WA (1917). North American Flora (PDF). Vol. 2. New York, New York: New York Botanical Garden. pp. 140–1.
  7. doi:10.1016/s0007-1536(42)80022-4
    .
  8. ^ Singer R. (1949). The Agaricales in Modern Taxonomy. Lilloa. Vol. 22 (2nd ed.). Weinheim, Germany: Cramer. p. 401.
  9. PMID 21215950. Archived from the original
    (PDF) on 2012-09-16. Retrieved 2012-07-09.
  10. ^ Konrad P, Maublanc A (1924). Icones Selectae Fungorum. Vol. 1. Paris, France: Lechevallier. p. 17:2.
  11. ^
    ISBN 978-0226721170
    .
  12. ^
    JSTOR 3756159
    .
  13. doi:10.1016/S0269-915X(98)80078-5
    .
  14. ISBN 0-472-85599-9
    .
  15. ISBN 978-87-983961-3-0
    .
  16. ^
    doi:10.1016/S1468-1641(10)60316-7
    .
  17. ISSN 0001-625X
    .
  18. ISBN 0-7627-3109-5
    .
  19. JSTOR 3753429
    .
  20. ^ Plowright CB (1903). "Volvaria loveana". The Gardeners' Chronicle. 3. 34: 318.
  21. ^ Buller AHR (1909). Researches on Fungi. Vol. 3. London, UK: Longmans, Green. pp. 442–6.
  22. ^ Smith WG (1867). "On the artificial production of Agaricus (Volvaria) loveianus, Berk". Journal of Botany. 5: 365–7.
  23. ISSN 0026-3648
    .
  24. ISSN 0972-4885
    .
  25. ISSN 0253-651X
    .

External links
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