Name: Lactarius abbotanus K. Das & J.R. Sharma
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First person to use this name on MO: Danny Newman
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Rank: Species

Status: Accepted

Name: Lactarius abbotanus

ICN Identifier: missing

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Author: K. Das & J.R. Sharma



Domain: Eukarya

Kingdom: Fungi

Phylum: Basidiomycota

Class: Agaricomycetes

Order: Russulales

Family: Russulaceae

Genus: Lactarius

Brief Description: [See More | Edit]

Etymology. The epithet abbotanus refers to the locality where the type material was collected (Abbot Mount, Champawat, Uttaranchal, India).
Pileus 64-83 mm diam., convex with depressed center, becoming deeply depressed to funnel shaped with age; cuticle glutinous, sticky, azonate, increasingly hairy towards margin, dark to deep orange yellow when young, brilliant yellow to orange yellow at maturity; margin decurved to imolled, hairy, hairs long, up to 7 rmn, slimy. LameIlae broadly adnate, distant (ca 4 per 10 mm), yellowish white, lamellulae in two rows. Stipe 38-45 × 14-18 mm, cylindrical or with broader base, hollow, yellowish white to pale yellow becoming soft orange yellow after bruising, distinctly scrobiculate or pitted, pits medium to soft orange yellow, base hairy. Context pale yellow, brilliant yellow on exposure. Latex white, immediately brilliant to yellow on exposure.
Spores 8.3-10.5 × 7.4-8.0 !-1m(n = 20, Q = 1.06-1.34), subglobose to ellipsoid, amyloid, ornamentation up to 1 !-1mhigh, composed of uneven ridges with acute edges forming partially complete reticulation, often spiny, connected with fine lines. Basidia 32-43 × 5-7 !-1m,subclavate, 4-spored. Pleurocystidia 55-74 × 7-11.5 !-1m,abundant, fusiform to conical, projected up to 48 !-1mbeyond hymeniallayer. Cheilocystidia 39- . 47 × 7-8 !-1m,clavate to subclavate. Paracystidia 26-30 × 8.5-9.5 !-1m,densely crowded, clavate. Subhymenium narrow, up to 10 !-1mthick, cellular. Pileipellis an ixocutis, about 500 !-1mthick, composed of densely interwoven thin walled hyphae, hyphae 2.5-4 !-1m broad. Lactiferous hyphae abundant in pilear trama,up to 8 !-1mbroad.

Ecology. Solitary, forming ectomycorrhiza with Quercus leucotrichophora A. Camus in temperate deciduous forests of Kumaon Himalaya.

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