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Lactarius indigo   (Indigo milk cap)
North America, Mexico, and Guatemala
Cap 5-15 cm diameter, stem 2-8 cm tall * 1-2.5 cm diameter

Lactarius indigo, also known as Indigo milk cap, is a medium to large indigo blue mushroom. The sticky cap surface has a silvery sheen. It grows solitary or grouped on forest soil, summer and fall.

Cap Firm, convex with a depressed disc and inrolled margin at first, becoming shallowly funnel-shaped. The surface is smooth, pale to light- or purplish-blue when fresh, later greyish or silvery. Gills Adnate to slightly decurrent and crowded close together. Their colour is an indigo blue, becoming paler with age or staining green with damage. Stem cylindric, hard, hollow. The surface is sticky and sometimes spotted. Spores pale yellowish.

Similar species include Clitocybe nuda and violet cortinarius species like Cortinarius camphoratus.

Lactarius indigo on Wikipedia.
Lactarius indigo on the MushroomExpert.Com web site.

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