Chlorophyllum sect. Rhacodium Z.W. Ge

Ge, Zai-Wei, Jacobs, Adriaana, Vellinga, Else C., Sysouphanthong, Phongeun, Walt, Retha van der, Lavorato, Carmine, An, Yi-Feng & Yang, Zhu L., 2018, A multi-gene phylogeny of Chlorophyllum (Agaricaceae, Basidiomycota): new species, new combination and infrageneric classification, MycoKeys 32, pp. 65-90 : 70

Chlorophyllum sect. Rhacodium Z.W. Ge sect. nov.

Diagnosis.

Differs from other sections by the stout basidiocarps with plate- like squamules on the pileus and white lamellae, basidiospores with wide germ pore and pileipellis composed of a tightly packed hymeniderm of cylindrical and flexuous, or narrowly clavate or narrowly lageniform elements.

Type.

Chlorophyllum rhacodes (Vittad.) Vellinga, Mycotaxon 83: 416. 2002.

≡ Agaricus rhacodes Vittad. [as ‘rachodes’], Descr. fung. mang. Italia: 158. 1835.

Description.

Basidiocarps medium to large sized, stout, agaricoid, with plate like squamules, basidiospores with wide germ pore, forming a truncated apex. Cheilocystidia clavate to sphaeropedunculate. Pileipellis a tightly packed hymeniderm of cylindrical and flexuous, or narrowly clavate or narrowly lageniform elements.

Discussion.

This section contains C. nothorhacodes , C. brunneum , C. rhacodes , C. olivieri and C. venenatum (Bon) C. Lange & Vellinga. There was controversy over the spelling of the species epithet ' rhacodes ' (originally published as ‘rachodes’). The Nomenclature Committee for Fungi debated the issue for years and the General Committee made the final decision that the epithet of Agaricus rhacodes Vittad. (Descr. Fung. Mang.: 158. 1833) is to be so spelled, even though it was originally spelled ‘rachodes’, which was approved by the International Botanical Congress in Shenzhen, China ( Wilson 2017).