Key to Cup and Saucer-Shaped Fungi

1. Fertile surface (inside of cup or if saucer-like, the upper surface) colored yellow or orange to orange-red
    or green or purplish

    2. Fruit body red, orange-red, orange-yellow to dull orange; margin fringed with conspicuous (use hand lens)
        dark brown or blackish hairs

        3. Fruit body red, orange-red to orange; 3-15 mm wide ......................................... Scutellinia scutellata

        3. Fruit body orange-yellow to dull orange; 1.5-5 mm wide .....................................Scutellinia erinaceus

    2. Fruit body not with above combination of color and marginal dark hairs 

        4. Fruit body greenish, yellow or purplish

            5. Fruit body purplish .......................................................................................Ascocoryne sarcoides

            5. Fruit body greenish and/or yellow

                6. Outer surface and fertile surface green (blue-green); colonized wood
                    same color ........................................................................................Chlorociboria aeruginascens

                6. Outer surface yellow, fertile surface yellow or green; colonized wood
                    not green

                    7. Outer and fertile surface entirely lemon-yellow ...............................................Bisporella citrina

                    7. Outer surface bright yellow, fertile surface yellow at first, becoming
                        green at maturity; rim of cup often appearing as a yellow circle
                        surrounding a greenish fertile surface ......................................................Chlorosplenium chlora

        4. Fruit body bright red

            8. Cup-like fruit body borne on a stalk, stalk and cup covered with conspicuous
                white hairs ......................................................................................................Microstoma floccosa   

            8. Fruit body stalked or not; not covered with conspicuous white hairs

                9. Shallow, cup-like fruit body 2-5 cm wide; stalk short or lacking .............Sarcoscypha austriaca

                9. Shallow cup-like fruit body up to 1.3 cm wide; stalk conspicuous ...........Sarcoscypha occidentalis

1. Fertile surface (inside of cup or if saucer-like, the upper surface) 1) whitish and concentrically zoned, 2) entirely
    whitish or blackish, or 3) some shade of brown including pale brown, tan, reddish brown or darker brown

    10. Fertile surface concentrically zoned, 0.5-2 cm wide ...................................................Trametes conchifer

    10. Fertile surface not zoned

        11. Fertile surface whitish or blackish

              12. Fertile surface whitish

                    13. Fruit body very small (1 mm wide), stalked, and covered with conspicuous
                          white hairs ..........................................................................................Dasyscyphus virgineus

                    13. Fruit body larger (1-3 cm wide), outer surface covered with conspicuous
                          brownish hairs ......................................................................................Humaria hemisphaerica

              12. Fertile surface blackish

                    14. Fruit body an urn-shaped cup, 3-8 cm wide; distinct stalk present ....................Urnula craterium

                    14. Fruit body saucer-shaped to flat-topped at maturity, 2-4 cm wide; stalkless .......Bulgaria inquinans

        11. Fertile surface some shade of brown including pale brown, tan, reddish brown or darker brown

              15. Flesh of fruit body rubbery-gelatinous

                    16. Fruit body 1-3.5 cm wide, decidedly two-toned with the fertile surface tan to reddish brown
                          and the outer surface blackish-brown and finely hairy .............................................Galiella rufa

                    16. Fruit body 3-15 cm wide, not distinctly two-toned; fruit body ear-shaped to irregularly
                          cup-shaped with portions of the fruit body irregularly wrinkled or with raised, vein-like
                          markings ........................................................................................................Auricularia auricula

              15. Flesh of fruit body tough to leathery or brittle, not gelatinous or rubbery; fruit body cup to
                    saucer-shaped, circular to irregular in outline, with or without wavy or torn margins

                   17. Outer surface whitish

                         18. Flesh of fruit body brittle; cups 6-12 cm in diameter .........................................Peziza repanda

                         18. Flesh of fruit body tough, leathery; individual fruit bodies 1-10 mm in
                               diameter, sometimes confluent with other fruit bodies .......................Aleurodiscus wakefieldiae

                   17. Outer surface similar in color to inner (fertile) surface........................................Peziza badioconfusa