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Nomenclature

Lactarius atromarginatus Verbeken & E. Horak
Austral. Syst. Bot. 13: 688. 2000.

Taxonomic synonyms:

= Lactarius lavandulus H.T. Le & Stubbe, Fungal Diversity 27: 85. 2007.

Original diagnosis

Pileus 55 mm diam., primo convexus, ad marginem involutus, dein planus vel concavus, papilla inconspicua instructus, pallide brunneusvel avellaneus, obscurior ad umbonem, siccus, radialiter rugosovenosus, ad marginem estriatus. Lamellae moderate densae, late adnatae vel subemarginatae, cetero arcuatodecurrentes, albae vel cremeae, lilacinae tactu, acie fusca instructae. Stipes 25-60 x 3-8 mm, cylindricus, apicaliter pileo concolor, basim versus pallidior, glaber vel velutinus, siccus. Caro alba, sub pileipellide fusca, rufescens vel pallide purpurascens. Odor saporque nulli. Latex aquosus, albus, rufescens vel purpurascens. Basidiosporae 7,0-7,7-8,8-9,6 x 6,5-7,1-8,2-8,7 µm, globosae vel subglobosae, reticulatae, amyloideae. Basidia 40-50 x 10-15 µm, tetraspora. Pleuromacrocystidia nulla. Pleuropseudocystidia valde abundantia, irregulariter tortuosa. Cellulae marginales 15-30 x 4-6 µm, subfusiformia. Pileipellis ex hyphis erectis vallum formantibus, cellulae terminales 15-30(40) µm, cylindricae vel subclavatae, pigmento incrustatae. Fibulae nullae. Ad terram in silvis fagineis montanisque (Castanopsis, Lithocarpus). Nova Guinea: Papua, Morobe District, Bulolo, Manki, 19.iii.1973, Horak 73-105 (holotypus CANB; isotypi GENT, ZH).

Typification

Holotypus: Horak 73-105 (CANB)
Asia: Papua New Guinea: Morobe distr., Bulolo, Manki

Description

Photographs

Microscopy

SEM photos