Amanita augusta

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Amanita augusta
Amanita augusta Pacifica.jpg
Amanita augusta in Pacifica, California
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Amanitaceae
Genus: Amanita
Species:
A. augusta
Binomial name
Amanita augusta
Bojantchev & R.M.Davis (2013)
Synonyms
  • Amanita aspera (Thiers 1982, Arora 1986)
  • Amanita franchetti (Boud.)

(1881)

Amanita augusta
Information icon.svg
Gills icon.png Gills on hymenium
Convex cap icon.svg Cap is convex
Free gills icon2.svg Hymenium is free
Ring and volva stipe icon.svg Stipe has a ring and volva
Transparent spore print icon.svg
Spore print is white
Mycorrhizal fungus.svgEcology is mycorrhizal
Mycomorphbox Inedible.pngEdibility is inedible

Amanita augusta is a small tannish-brown mushroom with cap colors bright yellow to dark brown and various combinations of the two colors. The mushroom is often recognizable by the fragmented yellow remnants of the universal veil. [1] This mushroom grows year-round in the Pacific Northwest but fruiting tends to occur in late fall to mid-winter. The fungus grows in an ectomycorrhizal relationship with hardwoods and conifers often in mixed woodlands. [1]

Contents

Taxonomy

A. augusta is a species of agaric fungus in the family Amanitaceae. Found in the Pacific Northwest region of North America, it was initially referred to as Amanita franchetti (Boudier 1881) and later Amanita aspera (Thiers 1982, Arora 1986), but suspected of being a distinct species, It was formally described as Amanita augusta in 2013. [1]

Description

The cap of A. augusta ranges from 4–12 centimetres (1+124+12 inches) across with a plano-convex curve. The surface of the cap is smooth and ranges in various shades of brown. The surface also contains scattered yellow to brown colored warts formed from the remains of the universal veil. The flesh of the mushroom is soft and tends to be white to light yellow. The lamellae consists of close, white gills that are free or mildly attached to the upper stipe. The stipe ranges from 5–15 cm long and 1–2 cm thick. Most stipe contain a partial veil that resembles a secondary, smaller ring the same color as the cap. The surface of the stipe is white and scattered with occasional scales. Yellow to gray warts remnants of the universal veil on the basal bulb. The spores are elliptical, ranging from 8x12 - 6x8 µm and amyloid. [2] Clamps are not present at the base of basidia. [3] Like many other mushrooms of the Amanita genus, A. augusta contains a white spore print. [4]

Distribution and habitat

Amanita augusta is mycorrhizal with a range of trees in mixed woodlands. Usually found in small groups or alone. This mushroom is most commonly found in Northern and Central California. The fungus is also found along the Pacific Northwest and has been seen in Montana and Idaho. [2]

Ecology

This species forms ectomycorrhizal associations with conifers and a variety of other hardwoods such as oak, spruce, and Pinus species. [1] This species showed a poor survival rate and is a very slow re-colonizer post controlled burn of host trees. [5] When the fungi reappear and grow mycorrhizae, they form small communities rather than grow in a large group. [6] Two of the most established hosts of A. augusta are P. muricata and Ps. menziesii . [1]

Toxicity

Amanita augusta is classified as a non-edible fungus. This mushroom is known to be an accumulator of heavy metals such as zinc, copper, lead, and others found in soil. [7] The metals are mostly found in the cap and accumulate in the sporocarps but the stipe also contains the heavy metals. Many of the wild A. augusta contain levels of heavy metals above the threshold for safe human consumption. [7] This mushroom's ability to accumulate heavy metals more effectively than others is most likely attributed to the ectomycorrhizal associations which allow them to be more efficient in the uptake of metals. [7] One of the most common metals found in this mushroom is zinc. [8]

Uses

Amanita augusta was found to have strong anti-proliferative activity and could be a potential source for drug discovery. Toxicity testing would need to be done within the mushroom in order to ensure that the medicinal properties are not negated by harmful side effects. [9] Along with being a strong anti-proliferative, this species is also shown to be anti-inflammatory and immunostimulatory as well, [10] meaning there may be many possible opportunities for drugs.

See also

Related Research Articles

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<i>Amanita ocreata</i> Species of poisonous fungus in the genus Amanita

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<i>Suillus brevipes</i> Species of edible fungus in the family Suillaceae found throughout North America

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<i>Amanita onusta</i> Species of fungus

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<i>Amanita bisporigera</i> Poisonous species of fungus in the family Amanitaceae endemic to North America

Amanita bisporigera is a deadly poisonous species of fungus in the family Amanitaceae. It is commonly known as the eastern destroying angel amanita, the eastern North American destroying angel or just as the destroying angel, although the fungus shares this latter name with three other lethal white Amanita species, A. ocreata, A. verna and A. virosa. The mushroom has a smooth white cap that can reach up to 10 centimetres across and a stipe up to 14 cm tall with a white skirt-like ring near the top. The bulbous stipe base is covered with a membranous sac-like volva. The white gills are free from attachment to the stalk and crowded closely together. As the species name suggests, A. bisporigera typically bears two spores on the basidia, although this characteristic is not immutable. A. bisporigera closely resembles a few other white amanitas, including the equally deadly A. virosa and A. verna.

<i>Amanita franchetii</i> Species of fungus

Amanita franchetii, also known as the yellow veiled amanita, or Franchet's amanita, is a species of fungus in the family Amanitaceae.

<i>Suillus pungens</i> Species of fungus in the family Suillaceae found in California

Suillus pungens, commonly known as the pungent slippery jack or the pungent suillus, is a species of fungus in the genus Suillus. The fruit bodies of the fungus have slimy convex caps up to 14 cm (5.5 in) wide. The mushroom is characterized by the very distinct color changes that occur in the cap throughout development. Typically, the young cap is whitish, later becoming grayish-olive to reddish-brown or a mottled combination of these colors. The mushroom has a dotted stem (stipe) up to 7 cm (2.8 in) long, and 2 cm (0.8 in) thick. On the underside on the cap is the spore-bearing tissue consisting of minute vertically arranged tubes that appear as a surface of angular, yellowish pores. The presence of milky droplets on the pore surface of young individuals, especially in humid environments, is a characteristic feature of this species. S. pungens can usually be distinguished from other similar Suillus species by differences in distribution, odor and taste. The mushroom is considered edible, but not highly regarded.

<i>Saproamanita thiersii</i> Species of fungus

Saproamanita thiersii, commonly called Thiers' lepidella, is a North American saprotrophic basidiomycete fungus in the genus Saproamanita. It is a white, small mushroom. Its cap is convex, measuring 3.5–10 centimetres across, and the stipe is 8–20 cm (3–8 in) long. The spore print is white.

<i>Amanita ceciliae</i> Species of fungus

Amanita ceciliae, commonly called snakeskin grisette, strangulated amanita, and the Cecilia's ringless amanita, is a basidiomycete fungus in the genus Amanita. First described in 1854 by Miles Joseph Berkeley and Christopher Edmund Broome, it was given its current name by Cornelis Bas in 1984. It is characterized by bearing a large fruit body with a brown cap 5–12 cm (2.0–4.7 in) across. The cap has charcoal-grey patches, which are easily removable. The stipe is 7–18 cm (2.8–7.1 in) long, white in colour, and there is no ring on it. It is slightly tapered to the top, and has irregular cottony bands girdling the base. The universal veil is grey. Spores are white, spherical in shape, non-amyloid, and measure 10.2–11.7 micrometres. The mushrooms are considered edible, but field guides typically advise caution in selecting them for consumption, due to risks of confusion with similar toxic species. A. ceciliae is found in woods throughout Europe and North America, where it fruits during summer and autumn.

<i>Amanita albocreata</i> Species of fungus

Amanita albocreata, also called the ringless panther or the ringless panther amanita, is a species of fungus in the family Amanitaceae. It was discovered in 1944, by William Murrill. It is commonly found in northeastern United States and southeastern Canada and elsewhere in North America. This species, that grows about 5 to 15 centimeters in length, is doubted to be fatally toxic. It normally grows between the rainy months of June and August.

<i>Amanita frostiana</i> Species of fungus

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<i>Amanita aprica</i> Species of fungus

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<i>Saproamanita</i> Genus of fungi

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References

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