Guide to Liverworts of Oregon: Key to Genera 82
HOME SPECIES INDEX GENUS INDEX GLOSSARY
1a plants thallose > 2b chloroplasts numerous > 62b thallus tissue complex > 70b terrestrial > 72b pores differentiated > 73b gemmae absent > 75b trigones small or absent > 77b pores not stellate > 79b pores simple > 81b thallus less than 8 mm side > 82
Left:Asterella californica, California, Tulare Co. DHW 2xxx; right: Asterella bolanderi, California, Monterey Co. DHW m1231;
82a Female receptacles conic or hemispheric, usually more or less lobed; a delicate pseudoperianth
surrounding each capsule with linear-lanceolate segments at maturity; five species in two genera; widespread and
common
Asterella and Mannia
(Crytomitrium tenerum, California, Kern Co. DHW 2xxx)
82b Female receptacles disk-shaped, the margin elaborated into a thin, horizontal, unlobed wing or
rim; lacking a pseudoperianth; presently known only from along the lower Rogue River
Cryptomitrium tenerum