26 Dansk Botanisk Arkiv, Bd. 2, Nr. 11. 



ff Cap whitish , 14. R. speculum. 



$ Dwarfy: small and short-stemmed. 



f Cap coarsely striate half way up, not silky 15. R elaphinusvar. 

 ff Cap even or ver} r minutely striate. 



° Cap with a silky lustre, roe-brown to umber. 



Odour mealy. Gills even 16. R. sericeus. 



§ Cap pitch -brown. Odour faint. Gills transversely 



veined . 17. R. costatus. 



b. Cap small, slightly viscid, sepia. Stem very slender, 



pallid 18. R. Batschianus. 



II. LEPTONIA Fr. 



A. Edge of gills black or dark blue. 



Ct. Edge blue. Growing on stumps 1. R. euchrous. 



(3. Edge black. Growing on the ground 2. R. serrulatus. 



B. Edge of gills not darker than face. 



Ct. Stem not yellow or white. 



a. Gills at first pure white. Stem dark blue. 



1. Cap sepia- brown, squamulose 3. R. placidus. 



2. Cap blackish-blue, velvety-flocculose in the middle 4. R.lampropus. 



b. Gills bluish or sordid. 



1. Gills at first bluish. Stem dark blue 5. R. chalybæus. 



2. Gills ding}-. Stem glaucous or brown'sh 6. R. asprellus. 



p. Stem 3 r ellow or white. 



a. Stem yellow, turning greenish coerulean when touched. 7. R. euchlorus. 



b. Stem white. Cap whitish or slightly ochraceous . 8. R. sericellus. 



III. NOLANEA Fr. 



A. Spores 4-(5-) angular, stellate or almost cruciform 



CX. Cap large (2 — 4 cm) 1. R. pascuus. 



ß. Cap small (1— l 1 /., cm) 2. R. bryophiliis. 



B. Spores not quadrangular-stellate. 



a. Spores heterodiametric (subovate). 



a. Basidia 2-spored (whole plant with a tinge of ochraceous) 3. R.cetralus. 



b. Basidia 4-spored. 



1. Plant not yellowish or pallid. 



* Tall (8—11 cm) 4. R. hirtipes. 



t Smaller (Stem less than 7 cm). 



f Gills pure white when young 5. R. infula. 



f f Gills fuscous or pale umber. 

 ° Cap glabrous, l 1 /, — 2 cm. 



§ Cap papillate. Stem rigid, polished. Gills not 



thick 6. R. mammosus. 



§§ Stem short, fuscous, not shining. Gills 



thick 7. R. clandestinus. 



° Cap minutely fibrillose, very small (less than 



1 cm) 8. R. fumosellus. 



