Phylum: Basidiomycota - Class: Agaricomycetes - Order: Geastrales - Family: Geastraceae
Distribution - Taxonomic History - Etymology - Identification - Culinary Notes - Reference Sources
The Beaked Earthstar (also referred to in some field guides as the Beret Earthstar) is rarely seen for two reasons: it is rare, and it is very easy to miss because it blends in so well with fallen leaves and other dead vegetation in coniferous or broadleaf woodland, which is where this earthstar generally occurs.
Unlike the Barometer Earthstar Astraeus hygrometricus, the rays of the Beaked Earthstar are not hygroscopic, and so once the rays have become fully extended they remain in much the same position come rain or shine.
From mid summer through to winter and often into the following spring the Beaked Earthstar can be seen in a few places in Britain and Ireland, but this is quite a rare find and tends to be localised.
The basionym of this species dates from 1801, when the Beaked Earthstar was described scientifically by Christiaan Hendrik Persoon in his Synopsis Methodicae Fungorum and given the binomial scientific name Geastrum pectinatum by which it is generally known today.
Synonyms of Geastrum pectinatum include Geaster pectinatus (Pers.) Quél., Geastrum plicatum Berk., and Geastrum tenuipes Berk.
Geastrum, the generic name, comes from Geo- meaning earth, and -astrum meaning a star. Earthstar it is, then. The specific epithet pectinatum means 'like a comb' and may be a reference to the comb-like striations around the 'beak'.
Spore sacThe pale greyish-blue to greyish-violet spore sac (often referred to as the bulb) is 1 to 3cm across and subglobose (in the form of a vertically compressed sphere) with a long, striated beak terminating in a small round pore via which spores emerge. The beak-to-spore sac connection is usually umbonate (the beak sitting in a shallow depression).
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Ray structureThe outer peridium, which at maturity forms the base of the fruitbody, comprises six to nine irregular pointed rays up to 7cm across when fully expanded. The spore sac stands above its base separated by a short stalk that has no basal collar - this feature differentiates the Beaked Earthstar from the slightly smaller but otherwise very similar Striate Earthstar Geastrum striatum, which has a basal colar. |
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SporesGlobose, warty, 5-6μm diameter excluding the warts. Spore massDark brown. |
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Odour/taste |
Not noticeable. |
Habitat |
Mainly found under conifers, particularly Yew, but sometimes with hardwood trees; reported also to appear in gardens and parkland very occasionally. |
Season |
Fruiting in the autumn; long lasting, and often visible all year round. |
Similar species |
Several other Geastrum species are of the same general form, and confident identification requires a lot of expertise. |
Earthstars are inedible and have no culinary value, but when dried they can make attractive table decorations as long as they do not get mistaken for pepper shakers!
Fascinated by Fungi, 2nd Edition, Pat O'Reilly 2016, reprinted by Coch-y-bonddu Books in 2022.
Pegler, D.N., Laessoe, T. & Spooner, B.M (1995). British Puffballs, Earthstars and Stinkhorns. Royal Botanic Gardens, Kew.
Ellis J B, Ellis M B. (1990). Fungi without Gills (Hymenomycetes and Gasteromycetes): an Identification Handbook. London: Chapman and Hall. ISBN 0-412-36970-2.
BMS List of English Names for Fungi
Dictionary of the Fungi; Paul M. Kirk, Paul F. Cannon, David W. Minter and J. A. Stalpers; CABI, 2008
Taxonomic history and synonym information on these pages is drawn from many sources but in particular from the British Mycological Society's GB Checklist of Fungi.
This page includes pictures kindly contributed by Simon Harding.
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