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Old 20-08-2007, 04:15 PM
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Join Date: Oct 2006
Location: Yateley, Hampshire
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Geastrum triplex - Collared Eathstar

One of the largest and most distinctive earthstars which grows in groups amongst leaf litter under deciduous trees like beech. The young unopened fruitbody is pointed and closley resembles a tulip bulb about 5cm in diameter:




The dissected fruit body shows the sessile, pale grey-brown spore-sac with the characteristic paler ring around the raised apical pore:




Further dissection shows a glutinous dark brown spore mass:




The globose spore-sac contained inside is revealed when the outer wall splits into 4-8 pointed rays which crack as they bend back under the fruitbody forming the familiar saucer like basal collar:

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