Two new species of Russula (Russulales) from India

Two species: Russula shingbaensis (R. subg. Heterophyllidia), characterized morphologically by greyish-green to slightly lilac pileus having tuberculately striate-sulcate margin, a stipe with a combination of white and vine colours, multichambered stipe context, indistinctive taste, spores ornamented with isolated warts, pilear elements with chains of globose to elongated inflated cells interspersed with comparatively narrow pileocystidia and R. thindii (R. subg. Russula), characterized by red viscid pileus, broadly adnate to adnexed lamellae, reddish to vinaceous stipe, acrid taste, pale yellow spore print and pileocystidia without any incrustations were collected from Shingba Rhododendron wildlife sanctuary of North Sikkim (India) and are proposed here as new to science based on their morphological features and ITS-based phylogenetic tree. Macro- and micromorphological descriptions coupled with the illustrations are given for both the taxa. Their relationship with allied taxa are also discussed in the present paper.