Guide to Liverworts of Oregon: Key to Jungermannia 8
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Jungermannia 1b perianth short; subequal to bracts > Jungermannia 7b dioicous > Jungermannia 8
Solenostoma hyalinum Old perianth - Thielson Creek, Douglas County, Oregon, DHW m2540.
8a Perianth extending just beyond bracts; perigynium about the same or less than the free portion of the perianth; rhizoids reddish but not purple; on soil
Solenostoma hyalinum
8b Perianth clearly shorter than and included within the bracts; the perigynium longer than the free perianth; rhizoids and leaf bases vinaceous to purple; on bare rock
Solenostoma obscurum
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