Guide to Hornworts of Oregon: Key to Hornwort Genera 1


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Phymatoceros bulbiculosus, Golden Creek, Douglas County, OR. Sperling B10-JS-03. Plant with young, still growing tubers; stalks often will be much longer at maturity.


1a Stalked tubers produced from ventral side of thallus.
Phymatoceros bulbiculosus


Phaeoceros pearsonii, Lane Co.,Oregon. DHW m1251.


1b Ventral stalked tubers lacking, tuberous thickenings sometimes produced marginally or (rarely) ventrally.
(Couplet 2)


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