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Helvella crispa, commonly known as the White Saddle or Elfin Saddle, is a distinctive ascomycete fungus characterized by its irregularly lobed, saddle-shaped cap and deeply fluted stem. The cap, typically measuring 2–6 cm in diameter, is cream to yellowish-white with a convoluted, brain-like appearance and a finely pubescent undersurface. Unlike gilled mushrooms, it releases spores from the upper surface of the cap. The stem is robust, 3–10 cm long, and white to pale tan, featuring prominent longitudinal ribs and deep lacunae (hollow chambers) that give it a composite, sculpted look. Ecologically, H. crispa is primarily ectomycorrhizal, forming symbiotic associations with deciduous hardwoods, particularly beech (Fagus) and oak (Quercus), though it is occasionally found with conifers. It fruits terrestrially in late summer and autumn, often appearing in small groups in leaf litter, moss, or along woodland paths. The species is part of a complex of cryptic species, with recent phylogenetic research suggesting that populations in North America and Asia may be genetically distinct from the European holotype.
Native: Europe (widespread), North America (Eastern and Western), Asia (China, Japan, Korea). Widespread in the Northern Hemisphere, though North American and Asian populations may represent distinct cryptic species (e.g., H. orienticrispa in China).
No strains cataloged yet for this species.
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