Pluteus sect. Celluloderma

Keerthi, V., Justo, Alfredo & Pradeep, C. K., 2024, Two new species of Pluteus (Pluteaceae) from India based on morphology and ITSbased phylogeny, Phytotaxa 670 (3), pp. 161-174 : 171-172

Key to the Indian species of Pluteus sect. Celluloderma

1. Basidiomata small, thin, fragile; pileus up to 22 mm diam................................................................................................................2

1. Basidiomata medium to large; pileus> 22 mm diam.........................................................................................................................7

2. Habitat on soil or on litter...................................................................................................................................................................3

2. Habitat on dead wood.........................................................................................................................................................................4

3. Stipe white, glabrous; caulocystidia absent................................................................................................................ P. pulverulentus

3. Stipe brown, pruinose; caulocystidia present ........................................................................................................... P. fusconigricans

4. Lamella edge brownish; cheilocystidia with brown contents.............................................................................................................5

4. Lamella edge concolorous; cheilocystidia hyaline.............................................................................................................................6

5. Basidiospores subglobose (5.2–6.0 × 4.8–6.0 µm); cheilocystidia fusiform, utriform to lageniform ............................... P. parvulus

5. Basidiospores broadly ellipsoid to ellipsoid (5.6–6.0 × 4.0–4.4 µm); cheilocystidia clavate to broadly clavate ............. P. pauxillus 6. Basidiospores subglobose; pleurocystidia ventricose-rostrate; pileipellis a uniform epithelium; caulocystidia present..................... ................................................................................................................................................................................ P. silentvalleyanus

6. Basidiospores globose; pleurocystidia vesiculose to clavate; pileipellis with pileocystidia; caulocystidia absent ....... P. delicatulus

7. Pileipellis a true epithelium or a hymeniderm....................................................................................................................................8

7. Pileipellis a trichoderm or transitional trichoderm...........................................................................................................................10

8. Pileus yellowish white; caulocystidia absent ............................................................................................................ P. luteostipitatus

8. Pileus brown; caulocystidia present ...................................................................................................................................................9

9. Basidiospores small (5.1–5.8 × 4.1–4.8 µm), broadly ellipsoid; pileipellis a true epithelium.................................. P. chimminiensis

9. Basidiospores large (4.5–7 × 4.5–5.6 µm), subglobose to broadly ellipsoid; pileipellis a hymeniderm ....... P. brunneosquamulosus

10. Pileus dark brown, velvety; stipe grayish white, squamulose with brown scales ......................................................... P. podospileus

10. Pileus brown or brownish orange, pruinose; stipe white with dark brown pruina ...........................................................................11

11. Basidiomata large and fleshy; basidiospores large (5.6–6.0 × 5.2―6.0 µm); cheilocystidia fusiform ................... P. fuscopunctatus

11. Basidiomata medium-sized, not fleshy; basidiospores small (4.2–5.2 × 4.1–5.1 µm); cheilocystidia clavate, fusiform, utriform to lageniform.................................................................................................................................................................. P. fuscipruinatus