Plants terrestrial, growing in a wet hillside meadow. Leaves up to 4 cm, bright green, pale toward base, pliant, gradually tapering to tip. Rootstock nearly globose, 3-lobed in the largest plants. Velum covering approximately 70% of the sporangium. Megaspores white, 320--380 μm in diameter, rugulate to spinulose with a spinulose equatorial ridge; girdle obscure.
Hundreds of plants observed in a 50x50 meter area surveyed. There is much more potential habitat nearby.
The plants in this population are larger, with larger, less spiny megaspores compared to I. minima in Kittitas County, Washington: https://www.inaturalist.org/observations/125837525
Growing in moist bottom layer of pine duff (ponderosa? https://www.inaturalist.org/observations/200363446 ).
So happy to finally find this one
On decorticated hemlock around 500m. Amazing - never seen anything like it before.
Looked pretty dried out a d Dead. I found it beside the foundation of my house. It's been clear, dry, frozen, and sunny over the weekend. Still some snow in the yard.
Looks like it did not fully develop, but spores and capillitium match P. album.