Jamesoniella autumnalis is a leafy-liverwort common in New Brunswick. It is recognized for its entire, elliptical leaves, its thin-walled, rounded cells and by the long cilia attached to the margines of parachetial bracts. The young shoots are green, but plants often develop red/brown pigmentation with time.
Jamesoniella autumnalis is most common on rotting logs in forested habitat, but also frequent on cliffs, outcrops, boulders and occasionally on tree bases or soil banks in shady areas.
There are 90 records of Jamesoniella autumnalis in New Brunswick throughout 13 counties: Albert, Carleton, Charlotte, Gloucester, Kent, Kings, Madawaska, Queens, Restigouche, Saint John, Victoria, Westmorland and York. As with other common species, its lack of collections from Northumberland and Sunbury counties probably reflect the bias of historical collection efforts, rather than its realized distribution; J. autumnalis is likely present in all counties.
There are at least 65 records of J. autumnalis at the New Brunswick Museum alone, probably with many more as unreported associate taxa. Significant out-of-province collections are held by the Due University Herbarium and UBC.
|Species Authority:||(D.C.) Steph.|
|Total Records held:||90|
|Total Records held at NBM:||65|
|Bibliography:||Belland 1992, Clay and Richards 1996, Cole et al. 2008|