Boletellus obscurecoccineus | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Fungi |
Division: | Basidiomycota |
Class: | Agaricomycetes |
Order: | Boletales |
Family: | Boletaceae |
Genus: | Boletellus |
Species: | B. obscurecoccineus |
Binomial name | |
Boletellus obscurecoccineus | |
Synonyms [1] | |
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Boletellus obscurecoccineus, [nb 1] known as the rhubarb bolete, is a species of fungus in the family Boletaceae, found in Australia, New Guinea, Java, Borneo, Japan, Korea, and Taiwan. It is a distinctive and colourful bolete of the forest floor.
Boletellus obscurecoccineus was originally collected in Java and described by Franz Xaver Rudolf von Höhnel in 1914, [2] and placed in the genus Boletellus by Rolf Singer in 1945. [3] In 2011, Nian-Kai Zeng and Zhu L. Yang synonymised the Asian species Boletus puniceus and Boletus megasporus with Boletellus obscurecoccineus. [1] Boletus puniceus, originally described from Kunming (Yunnan, China) in 1948, [4] and later transferred to Xerocomus in 1979 [5] and Boletellus in 2002, [6] was already suspected by E.J.H. Corner in 1972 as being conspecific with B. obscurecoccineus in his monograph on Malaysian boletes. [7] Boletus megasporus was described from the Xizang Autonomous Region of China in 1980. [8] Comparison of the type specimens revealed no significant morphological differences between B. obscurecoccineus and B. megasporus. [1]
A brightly coloured and distinctive bolete, Boletellus obscurecoccineus has a rose-red or rhubarb-coloured, hemispherical to convex cap to a diameter of 7 cm (3 in), with an overhanging margin when young. The cap may crack in older specimens, and reveal the yellow flesh beneath. The adnexed pores are five- or six-sided and yellow. They bruise blue in some specimens (although not generally in Western Australia). The narrow stipe lacks a ring, and may reach 9.5 cm (3.7 in) tall with a diameter of 2 cm (0.8 in). It is reddish and scaled overall, fading to yellow under the cap. The spore print is a dark brown. The mycelium is white. [9] There is no significant odour and the taste is mild. Under the microscope, the elongated pale yellow spores measure 14.5–19.5 by 6–7.5 μm. [10]
Similar-looking African collections initially reported as Boletellus obscurecoccineus have been redescribed as Boletellus rubrolutescens . [11] The North American and European species Boletus rubellus has colouration that is somewhat similar to B. obscurecoccineus, but it lacks the scaly stem of the latter. [12]
The distribution includes Korea, [13] New Guinea, Java, Borneo, Japan, [14] and Taiwan. [15] Within Australia, the rhubarb bolete has been recorded from southwestern Western Australia, and the southeast of New South Wales, and into Victoria and Tasmania. [10]
The rhubarb bolete is an ectomycorrhizal species, found in the leaf litter of eucalyptus forests in Australia, and with oak and other deciduous trees in Asia. [12] Fruit bodies appear over the summer and autumn, from July to November. [9]
Despite its English name, whether this mushroom is safe to eat is unknown. While there are no known species of inedible boletes that are deadly poisonous, there are many species of red-pigmented boletes that will cause gastrointestinal distress if eaten. [10]
The Boletales are an order of Agaricomycetes containing over 1300 species with a diverse array of fruiting body types. The boletes are the best known members of this group, and until recently, the Boletales were thought to only contain boletes. The Boletales are now known to contain distinct groups of agarics, puffballs, and other fruiting-body types.
The Boletaceae are a family of mushroom-forming fungi, primarily characterised by small pores on the spore-bearing hymenial surface, instead of gills as are found in most agarics. Nearly as widely distributed as the agarics, the family is renowned for hosting some prime edible species highly sought after by mushroom hunters worldwide, such as the cep or king bolete . A number of rare or threatened species are also present in the family, that have become the focus of increasing conservation concerns. As a whole, the typical members of the family are commonly known as boletes.
Strobilomyces is a genus of boletes. The only well-known European species is the type species S. strobilaceus, known in English as "old man of the woods".
Caloboletus calopus, commonly known as the bitter bolete, bitter beech bolete or scarlet-stemmed bolete, is a fungus of the bolete family, found in Asia, Northern Europe and North America. Appearing in coniferous and deciduous woodland in summer and autumn, the stout fruit bodies are attractively coloured, with a beige to olive cap up to 15 cm (6 in) across, yellow pores, and a reddish stipe up to 15 cm (6 in) long and 5 cm (2 in) wide. The pale yellow flesh stains blue when broken or bruised.
Phlebopus marginatus, commonly known as the salmon gum mushroom in Western Australia, is a member of the Boletales or pored fungi. An imposing sight in forests of south-eastern and south-western Australia, it is possibly Australia's largest terrestrial mushroom, with the weight of one specimen from Victoria recorded at 29 kg (64 lb). Initially described in 1845 as Boletus marginatus, and also previously known by scientific names such as Phaeogyroporus portentosus and Boletus portentosus, it is not as closely related to typical boletes as previously thought.
Xerocomus subtomentosus, commonly known as suede bolete, brown and yellow bolete , boring brown bolete or yellow-cracked bolete, is a species of bolete fungus in the family Boletaceae. The fungus was initially described by Carl Linnaeus in 1753 and known for many years as Boletus subtomentosus. It is edible, though not as highly regarded as other bolete mushrooms.
Austroboletus is a genus of fungi in the family Boletaceae. The widely distributed genus contains species that form mycorrhizal relationships with plants.
Sinoboletus is a genus of fungi in the family Boletaceae.
Aureoboletus mirabilis, commonly known as the admirable bolete, the bragger's bolete, and the velvet top, is an edible species of fungus in the Boletaceae mushroom family. The fruit body has several characteristics with which it may be identified: a dark reddish-brown cap; yellow to greenish-yellow pores on the undersurface of the cap; and a reddish-brown stem with long narrow reticulations. Aureoboletus mirabilis is found in coniferous forests along the Pacific Coast of North America, and in Asia. Unusual for boletes, A. mirabilis sometimes appears to fruit on the wood or woody debris of Hemlock trees, suggesting a saprobic lifestyle. Despite the occasional appearances to the contrary, Aureoboletus mirabilis is mycorrhizal, and forms a close association with the tree's roots.
Suillellus amygdalinus is a fungus of the bolete family found in western North America. The fruit bodies, or mushrooms, are characterized by their thick, red to brown caps, red pores, and the strong bluing reaction observed when the mushroom tissue is injured or cut. The cap can reach diameters of up to 12 cm (4.7 in) and the stipe 9 cm (3.5 in) long by 3 cm (1.2 in) thick at maturity. This mushroom has been found in manzanita and madrone woodlands of central California north to southern Oregon. Although the edibility of the mushroom is not known with certainty, it may be poisonous, and is not recommended for consumption. Other similar red-pored, bluing boletes from North America, including Rubroboletus eastwoodiae, Boletus luridiformis, and B. subvelutipes, can be distinguished from S. amygdalinus either by the color of the cap, the degree of reticulation on the stipe, or by location.
Boletellus ananas, commonly known as the pineapple bolete, is a mushroom in the family Boletaceae, and the type species of the genus Boletellus. It is distributed in southeastern North America, northeastern South America, Asia, and New Zealand, where it grows scattered or in groups on the ground, often at the base of oak and pine trees. The fruit body is characterized by the reddish-pink scales on the cap that are often found hanging from the edge. The pore surface on the underside of the cap is made of irregular or angular pores up to 2 mm wide that bruise a blue color. It is yellow when young but ages to a deep olive-brown color. Microscopically, B. ananas is distinguished by large spores with cross striae on the ridges and spirally encrusted hyphae in the marginal appendiculae and flesh of the stem. Previously known as Boletus ananas and Boletus coccinea, the species was given its current name by William Alphonso Murrill in 1909. Two varieties of Boletellus ananas have been described. Like many other boletes, this species is considered edible, but it is not recommended for consumption.
Aureoboletus russellii, commonly known as the Russell's bolete, or jagged-stemmed bolete, is a species of bolete fungus in the family Boletaceae. An edible species, it is found in Asia and eastern North America, where it grows in a mycorrhizal association with oak, hemlock, and pine trees. Fruit bodies of the fungus are characterized by their coarsely shaggy stem. The yellow-brown to reddish-brown caps are initially velvety, but become cracked into patches with age.
Boletus auripes, commonly known as the butter-foot bolete, is a species of bolete fungus in the family Boletaceae. First described from New York in 1898, the fungus is found in eastern Asia, Central America, and eastern North America from Canada to Florida. It is a mycorrhizal species and typically grows in association with oak and beech trees.
Boletus abruptibulbus is a species of bolete mushroom in the family Boletaceae. Described as new to science in 2009, it is found only in the Gulf Coast of the Florida Panhandle, where it grows on the ground in coastal sand dunes, one of only three North American boletes known to favor this habitat. The fruit bodies have convex brownish caps up to 8 cm (3.1 in) in diameter, supported by solid yellowish to reddish stems measuring 3–5 cm (1.2–2.0 in) long by 10–15 mm (0.4–0.6 in) thick. The pores on the underside of the cap measure about 1–2 mm in diameter and are initially pale yellow before developing a greenish tinge in age. The mushroom's spores, about 20 micrometers long, are unusually long for a member of the Boletaceae. The stem base is bulbous, a diagnostic feature for which the species is named.
Aureoboletus projectellus is a species of bolete fungus in the family Boletaceae. Found in North America, and recently in Europe, it grows in a mycorrhizal association with pine trees.
Tylopilus virens is a bolete fungus in the family Boletaceae found in Asia. It was described as new to science in 1948 by Wei-Fan Chiu as a species of Boletus; Japanese mycologist Tsuguo Hongo transferred it to Tylopilus in 1964. The fruit body has a convex to flattened cap that is 2.5–8 cm (1.0–3.1 in) in diameter. The tubes on the cap underside are up to 2 cm long, while the roundish pores are about 1–2 mm wide. The mushroom is similar in appearance to Tylopilus felleus, but unlike that species, has a greenish cap when young. T. virens typically grows near the conifer species Keteleeria evelyniana. It has elliptical spores measuring 11–14 by 5.5–6 μm.
Rubroboletus sinicus is a bolete fungus in the family Boletaceae. It is found in China. The species was first described by Wei Fan Chiu as Boletus sinicus in 1948, and transferred to the genus Tylopilus in 1979 by Fanglan Tai. In 2014, the genus Rubroboletus was created to accommodate this and allied species.
Fistulinella mollis, commonly known as the marshmallow bolete, is a bolete fungus in the family Boletaceae found in Australia.
Caloboletus kluzakii is a bolete fungus native to Europe. Until 2014, it was known as Boletus kluzakii. Recent changes in the phylogenetic framework of the family Boletaceae prompted the transfer of this species, along with several other related boletes, including Caloboletus calopus, to the genus Caloboletus. It was described scientifically in 2006 by Josef Šutara and Pavel Špinar, from specimens collected in the Czech Republic. The fungus had earlier been published with the name Boletus fallax by Czech mycologist Zdeněk Kluzák in 1988, but this was invalid, as that name had been used previously by E.J.H. Corner for a Malaysian bolete. The epithet honours Kluzák's contributions in describing the species.
Aureoboletus betula is a species of mushroom producing fungus in the family Boletaceae. It is commonly known as the shaggy stalked bolete.
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