Candy Cap

The Candy Cap is the best-known aromatic milkcap of western North America. Its fruitbodies are modest in size and plain rusty orange, but the scent that develops as they dry is unmistakable — sweet, warm and resinous, most often compared to maple syrup or fenugreek.

It belongs to the group of small to medium dry-capped milkcaps with thin, watery latex and pale spore deposits, the same broad assemblage that includes the European Curry Milkcap. For many years the western populations were filed under other names before being recognised as a distinct species, Lactarius rubidus.

It is a characteristic fungus of the California coastal oak woodlands, fruiting through the winter rainy season when much of the rest of the continent's fungal activity has ceased. Its brittle texture, hollow stipe and thin, sparse milk separate it from the heavier, denser milkcaps around it.

Cap

2–7 cm across, convex becoming plane and often shallowly depressed, sometimes with a small central point. The surface is dry and matt, occasionally minutely roughened or finely wrinkled toward the centre, and coloured bright rusty orange, orange-brown or reddish tan. It fades to a duller ochre with age and in dry weather. The margin is thin, often becoming wavy.

Gills

Close, narrow, adnate to slightly decurrent, pale cream to pinkish buff and darkening a little as the spores mature. They spot brownish where damaged.

Stipe

2–7 cm tall and 5–15 mm thick, brittle, dry, smooth, coloured like the cap or paler, becoming hollow and easily snapping. The base may have sparse whitish mycelial fibres.

Flesh and latex

The flesh is thin, brittle and pale buff to pinkish. The latex is a key character: watery, thin and translucent whitish, more like skimmed milk than the thick cream of many milkcaps, sparse in supply and unchanging in colour. The odour is faint when fresh, becoming intensely sweet, warm and resinous — maple- or fenugreek-like — as the fruitbody dries. Spore deposit white to pale cream.

The Candy Cap grows on soil and in leaf litter in coastal and foothill woodland, associated chiefly with coast live oak and tanoak, and also occurring with Douglas-fir and other conifers in mixed stands. It favours mossy banks, shaded slopes and the litter beneath dense oak canopies.

It fruits with the winter rains, typically from late autumn through midwinter along the Pacific coast of North America, from California northward. Fruitbodies appear scattered or in loose troops, often in large numbers in a wet season, and can persist for a week or more in cool damp weather.

This is an ectomycorrhizal species whose partnerships with oak, tanoak and Douglas-fir are a normal part of Pacific coastal forest soil biology. The fungal sheath around host rootlets extends hyphae far into the litter and mineral soil, drawing on nitrogen and phosphorus that the tree could not otherwise access and buffering the host through the long dry summers of a Mediterranean climate.

Because it fruits during the winter rain season, it forms part of a distinctive cool-season fungal community. The volatile aromatic compounds that accumulate as the tissue dries persist long after the fruitbody has withered, and dried remains on the forest floor can still be detected by scent. Decaying fruitbodies support fungus gnats and other litter invertebrates.

Lactarius xanthogalactus is superficially similar in colour and size but its latex turns bright yellow within a minute of exposure, unlike the unchanging watery milk of the Candy Cap. Lactarius substriatus is smaller with a more strongly striate margin and generally moister cap.

The Rufous Milkcap (Lactarius rufus) is a deeper brick red with a sharper central point, denser latex and no aroma, and is a boreal conifer species. The European Curry Milkcap (Lactarius camphoratus) shares the aromatic quality but is darker chestnut and belongs to a different continent and habitat.