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Tortula brevissima Schiffn, is recognized in coastal California, USA. It is described and distinguished from other local species of Tortula and Crossidium seriatum Crum & Steere, with which it has been confused. Currently known distribution and habitat in California are given. Drawings, reproduced from Cano (2006) are shown.
The following taxa are newly reported from Pennsylvania: Absconditella sphagnorum, Cladonia cariosa, C. submitis, Coenogonium luteum, Dactylospora glaucomarioides (on Ochrolechia yasudae), Flakea papillata, Heterodermia squamulosa, Lecanora epanora, Lecidea nylanderi, Lichenochora galligena (on Physcia americana), Lithothelium septemseptatum, Megalospora porphyritis Opegrapha zonata, and Sarea difformis. A second population of Opegrapha bicolor, otherwise known only from the type locality in Monroe County and a disjunct population in Uganda, is reported. A modern collection of Pertusaria trachythallina is reported. Many of the species discussed are restricted to remnant high quality, undisturbed habitats in the study area.
Our research assesses the ability of calyptrae to produce protonema in the moss species Funaria hygrometrica Hedw. Herein the following question is addressed: how long after detachment from the maternal plant are calyptrae able to produce new individuals by means of protonema? Plants from a local Connecticut population were grown in laboratory conditions until 2, 14, or 28 days post-detachment of the calyptra from the leafy gametophyte. Calyptrae were removed, placed onto sterile media, and observed for protonemal growth for 10 weeks. Calyptrae were found to be alive and produced protonema at all three developmental ages. The youngest calyptrae produced the highest percentage of protonemal growth, whereas the oldest calyptrae produced significantly fewer. Our data provide evidence that calyptrae in a laboratory setting remain alive after detachment from the maternal plant and may have the potential to act as a dispersal unit.