Guide to Liverworts of Oregon: Key to Asterella 2
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 mostly <8 mm wide > 82a receptacle conic > Asterella 1b sex organs on primary thallus > Asterella 2
Asterella californica, Kern River, Kern Co., California. DHW 3077.
2a Plants dioicous, antheridia on different thalli from carpocephala; spores larger than 100 μm, reticulate with perforate, erose ridges; proximal face pointed-pyramidal, with perforate, erose ridges.
Asterella californica
Left: Asterella lindenbergiana. Mesa Creek Meadows, Lane Co., Oregon. DHW
Sept. 1993; Right: Mannia gracilis. Spencer Butte, Lane Co., Oregon. DHW m1492a.
2b Plants monoicous, antheridia usually immediately behind carpocephala or sometimes on another branch of the same thallus; spores smaller, less than 100 μm, reticulate with smooth ridges or erose and microreticulate in Asterella saccata.
(Couplet 3)