Observation 159768: Lactarius subserifluus Longyear
When: 2009-12-17
No herbarium specimen

Notes: Cap 2-7cm wide, typically convex-depressed to funnel-shaped, usually w/an umbo, orange-brown becoming paler in age; margin crenate to wavy; flesh taste mild or faintly acrid.

Gills yellowish, soon stained vinaceous-cinnamon, becoming orange-cinnamon overall or tainted vinaceous in age; latex watery on exposure, unchanging, staining the gills vinaceous-cinnamon, taste mild; stipe 3-7mm thick, orange-cinnamon on the upper portion, dark rusty brown below, ornamented w/orange-cinnamon hairs on the base; associated with oaks.

Similar species:
Lactarius rimosellus is similar but has larger spores that are ellipsoid and ornamented w/isolated warts that do not form a reticulum; white to whey-like or watery latex that is unchanging and does not stain the gills; its stipe lacks orange-cinnamon hairs at the base; it is associated w/conifers.

Lactarius areolatus has larger spores that are subglobose to broadly ellipsoid that are ornamented w/warts & short bands that do not form a reticulum; has white to whey-like to watery latex that is unchanging and does stain the gills; its stipe lacks orange-cinnamon hairs at the base; is associated with oaks.

Proposed Names

77% (1)
Eye3 Eyes3
Recognized by sight
Used references: Longyear, Report Mich. Acad. Sci. 3: 57 (1902)
Bessette, A.E., D.B. Harris, and A.R. Bessette. 2009. Milk Mushrooms of North America. Syracuse University Press, Syracuse. 299 pp.
Based on microscopic features: Spores 6.0 × 7.5 × 6-7 micrometers, globose to subglobose, ornamented w/warts & ridges that form a partial reticulum, prominences up to 1.5 micrometers high.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2014-02-15 11:03:52 PST (-0800)
Last modified: 2014-02-15 11:57:49 PST (-0800)
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