Orthotrichum ohioense
“Ohio bristle moss”
Orthotrichum ohioense on a fallen branch on the ground. March 19, 2020 in Delaware County, Ohio.
Orthotrichum ohioense in mid-summer (July 20, 2019) in Fairlfield County. Note the deeply 8-ribbed capsules.
Orthotrichum ohioense leaf.
Immersed stomate of Orthotrichum ohioense.
How to recognize Ohio bristle moss: Orthotrichum ohioense occurs in small dark green tufts. It is a cushion moss with little 1-1.5 mm long capsules barely emergent above the upper leaves. This moss genus has significant differences between the capsules which require a compound microscope to sort them out. The calyptra (capsule cover while developing) is naked or sometimes with a few sparse hairs. The apiculate leaves are erect when dry and wide spreading when wet. Old dry capsules are deeply 8-ribbed and have immersed stomata.
Where to find Ohio bristle moss: Orthotrichum pumilum occurs on the bark of hardwoods.
