Key to Stinkhorn Fungi

1. Olive-green, slimy spore mass distributed along inner surfaces of 3-5 "arms" rising
     from a common stalk ..................................................................................................Pseudocolus fusiformis

1. Olive-green, slimy spore mass confined to terminal portion of a single stalk

    2. Distinct head present, lower margin of head free from stalk, head covered with olive brown slime;
        stalk whitish or reddish (in part); whitish to pinkish cup (volva) at base of stalk
        3. Stalk whitish ..............................................................................................................Phallus ravenelii

        3. Stalk orangish (at least in part) .................................................................................Phallus rugulosus

    2. Distinct head lacking; olive-brown slime merely covering a portion of the upper stalk;
        stalk pinkish-red to orangish or orangish-red or whitish; sac-like volva at base of stalk

        4. Stalk thickest in middle and gracefully tapered toward apex; spore mass not
            distinctly marked-off from stalk, covering upper third to upper half
            of stalk; stalk orangish to orangish-red to pinkish to bright red ..............................Mutinus elegans

        4. Stalk cylindrical (more or less equal in diameter), slightly swollen at apex; spore
            mass abruptly marked-off from stalk (i.e., with a clear line of separation between
            spore mass and stalk), covering less than the upper third of the stalk; stalk
            whitish to pinkish-rose to orangish to orangish-red, at least toward apex

            5. Stalk completely whitish or whitish below and orangish to orangish-red
                above or uniformly colored.....................................................................................Mutinus caninus

            5. Stalk sometimes whitish below but pinkish-rose above or uniformly
                colored; darker reddish or rose-pink above, underneath spore slime layer.............Mutinus ravenelii