Guide to Liverworts of Oregon: Key to Fossombronia 4
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Fossombronia 1a seta short > Fossombronia 4
Left: New River, Coos Co., Oregon, DHW m0783. Right: New River, Coos County, Oregon. DHW m0797. Stained with safranin and methylene blue.
4a Spores 45-50 μm; released after tetrads have separated; leaves irregularly folded; monoicous.
Fossombronia foveolata
Left: Sutton Creek, Lane Co., Oregon, Tremblay 348 (UC). Right: Sutton Creek, Lane Co., Oregon. DHW m1396.
4b Spores less than 25 μm, some remaining in tetrads when capsule is mature; leaves imbricate-plicate; dioicous. Known only from one ephemeral locality in Oregon; possibly extinct.
Fossombronia incurva