Habitat and Substrate: Open to shaded areas, on old wood, logs, soil, and humus-covered rocks.

Rhode Island Status: Very common.

Pollution Tolerance: Tolerant.

Collection Site(s): Diamond Hill State Park, Cumberland (#4829); Schoolhouse Pond/Deep Pond, Charlestown (#4873, #4873A*); Beaver River, Richmond (#4895); Grass Pond, Richmond (#4909*); Carolina Wildlife Management Area, Richmond (#4931); Great Swamp Area, South Kingstown (#4947); Tuckerman Park, South Kingstown (#4960); Matunuck Hills Area, South Kingstown (#4990); Queen River Area, Exeter (#5012*); Ell Pond, Hopkinton (#5034, #5034A*); Ponagansett Public Fishing Area, Foster (#5056); Sprague Farm, Glocester (#5085); Headwaters of Wood River, West Greenwich (#5130); Big River Wildlife Management Area, West Greenwich (#5149*, #5546); Snake Den State Park, Johnston (#5193*, #5195); Lake Wallum, Burrillville (#5201); Buck Hill Wildlife Management Area, Burrillville (#5220); First Baptist Church at Cross Mills, Charlestown (#5273); Pawtucket River Pine Barrens, Richmond (#5298); Blue Pond, Hopkinton (#5319); Frenchtown Park, East Greenwich (#5421); Audubon Fort Nature Preserve, North Smithfield (#5455, #5455A*); Iron Mine Hill Road, North Smithfield (#5478); Black Swamp Area, North Kingstown (#5495); SR-146, North Smithfield (#5629, #5638*).
*K+, P+ chemical strain (see NOTES, below).

Notes: Previously reported from Rhode Island by Bennett (1888), Riddle (1909), Hebert (Flenniken 1968a), and Flenniken (1968b). Collection numbers marked with an asterisk (*) indicate the chemical strain containing thamnolic acid and testing K+ yellow, P+ yellow