Cauliflower fungus

What it is

Sparassis crispa is the cauliflower fungus. Its fruit body is a large, frilled mass of flattened lobes, which the species epithet crispa refers to: the lobes are pliable and cartilaginous. The fungus grows at or near the base of conifers, where it attacks roots and the base of the trunk and causes a brown cubical rot. Fruiting occurs from July to October.

The name is applied broadly. A 2022 review uses S. crispa in a broad sense, notes that Index Fungorum lists 17 names for the group, and says that molecular phylogenies have reduced these to ten. The predominant Asian isolate was named Sparassis latifolia. The supplied catalogue notes that other regions have separate Sparassis species, so the name does not identify one organism across the world.

Distribution and host trees

The review describes the fungus as widely distributed across the north temperate zone, and lists reported records in the United States, Australia, France, Germany, Russia, China, Japan, Nepal, Turkey and India. In India it is most commonly found in Himachal Pradesh. Its hosts include larch and Korean pine, and the review says it does not cause major harm to trees.

Food and culinary use

The review describes the species as considered edible across the world. It is usually eaten young and fresh, and sometimes dried and preserved. The review states that it has been used in traditional cooking in China, Japan and Korea for centuries.

The supplied catalogue describes it as a frilled culinary fungus, used cooked, and notes that cleaning its folds is a practical challenge. The review does not describe cleaning or cooking methods, so no method is set out here.

Cultivation

The review states that the fungus is commercially cultivated in Japan, Korea, China, Germany and the United States, mainly on larch sawdust. Methods reported include bottle, bag and log cultivation. One reported substrate was 76 percent sawdust, 18 percent wheat bran, 2 percent cornmeal and 1.5 percent sucrose, with a moisture content of 65 percent described as best for growth.

Cultivation is therefore a regular source of supply in several countries, and the catalogue records regional cultivation in several European countries. Cultivated supply and wild collection are not the same, and the catalogue does not record which one a given product comes from.

Safety and identification

This entry is not an edibility verdict or an identification. The review states that no harmful effects have been recorded following human consumption. It does not give field features for telling the species apart from toxic look-alikes, and it says that identity should be authenticated using molecular methods in research.

Wild collection needs a qualified identification before any use, because the review's own taxonomy shows that the name covers several species. The review's account of harm is a statement about consumption records, not a guarantee for a specimen collected elsewhere.