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Nomenclature

Lactarius sulcatulus Verbeken
Bull. Jard. Bot. Natl. Belg. 65: 210. 1996.

Original diagnosis

Pileus 2-4.5 cm diam., applanatus ad infundibuliformis, in centro papillam acutam praeditus; margine tenui, crenulato, undulato, leviter sulcato, fimbriato ad serrato; pileipellis radiale venulosa, atrobrunnea ad pallide brunnea vel flavido-brunnea in centro, marginem versus griseo-flavida, rubro-brunnescens. Stipes 1.5-2.3 cm longus, 0.4-0.6 cm crassus, cylindratus, basin versus attenuatus, gracilis, leviter velutinus, flavido-albus ad flavidus. Lamellae adnatae ad decurrentes, distantes, 2-5 mm latae, tenues, flavido-albae tum cremeae. Contextus tenuis, albidus, leviter rubro-brunnescens, gustu mitis. Latex non abundans, translucido-albus, leviter brunnescens; gustu papayae similis. Sporae albidae in cumulo, ellipsoideae, 7.5-8.1-8.6 x 6.0-6.6-7.2 µm, zebroideae, alatae, verrucis isolatis, elongatis et cristis usque ad 1 µm altis ornatae; macula suprahilaris non amyloidea vel distale amyloidea. Basidia 50-60 x 9-11 µm, subcylindrata ad subclavata, tetraspora. Macropleurocystidia absentia. Pseudopleurocystidia abundantia, emergentia, 10-13(15) µm diam., cylindrata vel clavata, obtusa. Pileipellis bistrata, gelatinosa; elementa suprapellis 10-50 x 5-8 µm, cylindrata, obtusa, interdum septata; subpellis ex cellulis sphaericis.
Holotypus: Rammeloo Z414 et icon. phot. (GENT), Zaire, Kivu Prov., Irangi, on wood, iv 1972.

Typification

Holotypus: Rammeloo Z414 (GENT)
Africa: Democratic Republic of the Congo: Kivu Prov., Irangi

Published type studies: Verbeken, Persoonia 17: 387 ss. (2001).

Description

Photographs

Microscopy

SEM photos