Hornworts

Anthoceros fusiformis

Ephemeral but frequent, this dark green Anthoceros has a fluted and heavily dissected thallus that can range from dime-to-quarter-sized in the seasonally saturated fine…

Anthoceros punctatus

Functionally a weed in the region, the infrequent occurence on A. punctatus on disturbed urban and agricultural soils is one of the only hints to its identification. It has…

Paraphymatoceros pearsonii

A rare hornwort with a relatively undissected thallus, it can form large populations of coin-sized matte green plants over seeping fine soils and vernal pools. At maturity…

Phaeoceros oreganus

Phymatoceros bulbiculosus

Often obscured below herbs, algae and other bryophytes, this rare seep hornwort has a scantly dissected, smooth dark-green thallus that can form extensive populations of…