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Brick Cap (Hypholoma lateritium)

Ложноопёнок кирпично-красный
Current name

Index Fungorum   Hypholoma lateritium (Schaeff.) P. Kumm
MycoBank   Hypholoma lateritium (Schaeff.) P. Kumm

Other names

Brick-red False Honey Mushroom, Brick-red Hypholoma.

The word "false" (ложный) in the mushroom's name should not be alarming; here it functions like the negation particle "not," literally meaning "not a true honey mushroom." This naming convention is very common in Russian-language mycology and carries no sinister implications. In this context, the word "honey mushroom" (опёнок) simply refers to a fungus that grows on stumps. And here is where caution is needed: not everything that grows on a stump is a true honey mushroom.

Systematic position
Specific epithet etymology

lateritius, a, um — 1) brick-like, made of bricks; 2) mycol. brick-red. From later (brick) + -itius (adjectival suffix).

Synonyms

Pratella lateritia (Schaeff.) Gray, A natural arrangement of British plants 1: 627 (1821) 

Psilocybe lateritia (Schaeff.) Noordel., Persoonia 16 (1): 129 (1995)

Agaricus sublateritius Fr., Epicrisis Systematis Mycologici: 221 (1838) 

Agaricus carneolus Batsch, Elenchus fungorum: 83 (1783)

Agaricus pomposus Schumach., Enumeratio Plantarum, in Partibus Sællandiae Septentrionalis et Orientalis Crescentium 2: 251 (1803) 

Naematoloma lateritium (Schaeff.) P. Karst., Meddelanden af Societas pro Fauna et Flora Fennica 16: 101 (1890) 
 

Habit
Fruiting body
Agaricoid (cap and stipe)
Hymenophore
Lamellate (gills present, including folded or rudimentary)
Fruiting period (list)
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Mushroom cap

Cap 4–10 cm in diameter; initially hemispherical, with the underside covered by a whitish partial veil bearing whitish floccose remnants, reddish-brown to orange-yellow with a lighter, yellowish margin; later becoming convex to convex-expanded, with an incurved or downturned edge, bearing light floccose veil remnants along the margin; surface matte, pale yellow-orange, with a light yellowish or olive-yellowish margin and a brick-red center, often with a darker central area, sometimes marked with reddish-brown spots.

Hymenophore lamellate. Gills crowded, adnate or emarginate; initially light, yellowish-brownish or dirty yellow, later becoming gray-yellow-olive, and finally olive-brown with a violet tint.

Stem

Stem 5–10 cm long and 1–1.5 cm in diameter; even or tapering toward the base, often curved, dense, fibrous, sometimes bearing fibrous veil remnants; initially solid, later becoming hollow; pale yellowish at the apex, rusty brown toward the base.

Flesh

Flesh thick, dense, yellowish, yellowish-brown in the stem, with a slightly bitter taste. Odor mushroom-like, faint.

Microscopy

Spore print dark purple. Spores cylindrical, narrowly ellipsoid.

Ecology and distribution

Xylotroph. Grows abundantly in August and September in deciduous, broadleaf, and mixed forests on decaying wood of deciduous trees (birch, more often oak), on stumps and nearby, in groups, clusters, or colonies; frequently and annually. Widely distributed in America, Europe, and Asia.

Fruiting

July–November

Nutritional properties
Conditionally edible

Conditionally edible mushroom (although some mycologists consider it inedible or even poisonous) with an astringent taste. It is collected in some regions of Russia, and according to literature, in certain foreign countries (Canada, Germany, USA, Japan, and others). In Japan, this mushroom is cultivated under the name Kuritake. Notably, there is no mention of bitterness (unlike the Sulphur Tuft, which in Japan is called Nigakuritake — "Bitter kuritake"). It is used fresh (in cooked dishes), salted, or pickled. It is best to collect young, partially opened caps with the upper part of the stem. There are reports that young caps fried in olive oil are especially tasty.

Consumption in raw form may cause digestive upset, as raw Brick Cap contains thermolabile (heat-labile) fasciculols — compounds similar to the active toxins of the Sulphur Tuft (though the fasciculols in the latter are not neutralized by boiling) — as well as clavaric acid (considered potentially carcinogenic). Boiled mushrooms do not cause poisoning symptoms, which is why they are sometimes used for salting, pickling, or, less commonly, in cooked dishes (more often in Europe and the USA). Occasionally, soaking is recommended to reliably remove any bitterness.

Conservation status

Not listed in the Red Data Book of the Russian Federation or regional Red Lists.

Similar species

- Sulphur Tuft (H. fasciculare) has an unpleasant odor of damp, freshly dug earth, is smaller in size and lighter in color, and has a much more bitter taste than the Brick Cap;

- Grey-legged Hypholoma or Poplar Hypholoma (H. capnoides) grows only in late autumn on coniferous fallen wood, is lighter in color, not bitter, and has gray gills without brown or greenish tints;

- Scarlet Scaly Cap (Pholiota astragalina) differs by its slightly decurrent yellow gills that darken only slightly with age, and a brighter, more orange tone of coloration; bitter when raw but not poisonous;

- Summer Honey Mushroom Kuehneromyces mutabilis has a strong mushroom odor, a distinctly zonately colored yellow-brown cap (the transition is smoother in false honey mushrooms), and slightly decurrent brownish gills without gray tones;

- Funeral Bell Galerina marginata is colored without red or gray tones, has a small, non-zonate yellow-brown cap (caps no larger than 5 cm in diameter), and a faint odor of dampness or flour. Deadly poisonous.

Notes

According to some sources, in ancient times Slavic healers used decoctions of the Brick Cap (*Hypholoma lateritium*) as an emetic and laxative.

Link to this page for printed editions
Shipovalov A.G. Brick Cap (Hypholoma lateritium) - Mushrooms of Vologda Region [Electronic resource] URL: https://xn----7sbancweblffgklubds60aja.xn--p1ai/en/brick-cap-hypholoma-lateritium (accessed: 13.04.2026).
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