Chromosera

Grootmyers, Django, Mullineux, Sahra-Taylor, Redhead, Scott A., Bau, Tolgor, Horman, Joel, Kerner, Ron, Lebeuf, Renée, Sergeev, Alexey, Tomko, Paul, Wasilewski, David, Ré, Lauren A., Hickey, Sadie, Ness, Steve, Russell, Stephen D. & Lodge, D. Jean, 2025, Geographic distributions in Chromosera species-continental and oceanic barriers, including a new species, a new variety and a new combination, Phytotaxa 690 (1), pp. 17-35 : 32

Key to species of Chromosera

1 Basidiomes terrestrial, on mossy to lichen colonized peaty to sandy soil or heath............................................................................2

1’ Basidiomes lignicolous, on decaying coarse conifer wood (stumps, logs, branches)........................................................................7

2 Basidiomes entirely light to dark violet to pale lilac..........................................................................................................................3

2’ Basidiomes overall bright yellow, olivaceous, or orangish yellow to orangish or yellow mixed with lilac on the stipe (base or top), and/or lamellae, and/or pileus.............................................................................................................................................................4

3 Basidiomes violet to dark lilac (lacking yellow); spores broadly ellipsoid to globose, 5–6 µm diameter; pileus and stipe not viscid........................................................................................................................................................................................ C. viola

3’ Basidiomes lilac; basidiospores ellipsoid, never subglobose, 4–8 µm wide; pileus and stipe slightly viscid .................... C. lilacina

4 Basidiomes chrome yellow, sometimes olivaceous, lacking lilac or orange tints............ C. citrinopallida complex (see discussion)

4’ Basidiomes with some lilac or orange tints........................................................................................................................................5

5 Basidiospores 5–8 x 3.5–5.5 µm, pileus usually orange-yellow................................................................................. C. xanthochroa

5’ Basidiospores longer, mostly 7–12 µm, basidiomes usually with some lilac tints ............................................................................6

6 Basidiospores 4–8 µm wide; from transatlantic arctic and alpine zones ............................................................................ C. lilacina

6’ Basidiospores mostly 4.5–5.5 µm broad, known from heaths in western Europe ( France).............................................. C. ambigua

7 Totally lilac ......................................................................................................................................... C. lilacifolia var. totililacicolor

7’ Pileus with yellow coloration .............................................................................................................................................................8

8 Mean spore length 5.9–7.1 µm, majority <6.5 µm long, eastern to southwestern North America ................................ C. lilacifolia

8’ Mean spore length longer, 7.7 µm, all> 6.5 µm long ........................................................................................................................9

9 Lamellae usually pale rosy lilac, found in northwestern North America .......................................................................... C. loreleiae

9’ Lamellae often bluish lilac, pale or strongly colored, Eurasian species...................................................................... C. cyanophylla