Guide to Hornworts of Oregon: Key to Phaeoceros 2
Hornworts 1b stalked ventral tubers absent > Hornworts 2b spores yellow > Phaeoceros 1b spores not brown > Phaeoceros 2
Phaeoceros carolinianus, Sutton Beach, Lane Co., Oregon. DHW m2414a
2a Capsules longer than 2 cm at maturity, straight; chloroplasts angular; tuberous thickenings entirely lacking.
Phaeoceros carolinianus
Phaeoceros hallii, Slagle Creek, Jackson Co., Oregon. DHW 9579.
2b Capsules less than 2 cm at maturity, curved; chloroplasts rounded to angular; thallus with apical and marginal, sometimes stalked, tubers.
(Couplet 3)