In the tropics, the diversity of ectomycorrhizal milkcaps is predominantly represented by genus Lactifluus. In Brazil, species traditionally described as Lactarius need to be revised and recombined. Thus, seven milkcaps from Amazonia and Rio Grande do Sul, Brazil, published by Rick, Singer and co-authors were reviewed. Lactarius amazonensis, L. brasiliensis, L. braunii, L. mamorensis and L. russula, along with the recently described L. rupestris, are combined in Lactifluus. In addition, Lactifluus annulifer together with Lf. braunii and Lf. russula, have lectotypes designated. A modern and detailed microscopic description, drawings and taxonomic discussion are provided for each species.

在热带地区，乳根外乳菌盖的多样性主要由乳杆菌属代表。在巴西，需要对传统上称为乳杆菌的物种进行修订和重组。因此，对Rick，Singer及其合著者出版的来自巴西亚马逊州和南里奥格兰德州的7个牛奶瓶进行了审查。乳亚马孙，L.巴西，L.藻，L. mamorensis和L.菇，随着最近描述L.沙地葡萄，组合在Lactifluus。另外，环乳杆菌与Lf一起。布劳尼和如果。russula，指定了选型。为每个物种提供了现代而详细的微观描述，附图和分类学讨论。