Guide to Hornworts of Oregon: Key to Hornwort Genera 2

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Hornworts 1b stalked ventral tubers absent > Hornworts 2


Anthoceros fusiformis; left: 2X4 Creek, Coos Co., Oregon, DHW 9371; right: Linn Co., DHW m1329a.


2a Spores black; thallus with lamellae and irregular projections on upper surface; internal mucilage chambers present.
Anthoceros


Left: Phaeoceros hallii, Slagle Creek, Jackson Co., Oregon. DHW 9579; right: Phaeoceros pearsonii, Lane Co.,Oregon. DHW m1251.


2b Spores yellow to yellowish brown; thallus smooth or ruffled above but without projections; internal cellular structure compact.
Phaeoceros


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