Mountain spleenwort is rare in Connecticut; it is listed as a species of special concern.
- Family: spleenwort (Aspleniaceae)
- Habitat: acidic soil in crevices on shaded cliffs
- Height: 4 inches
- Location of spores: underside of frond
- Petiole (leaf stalk): brown at base, green above; smooth, slender, and fragile
- Growth pattern: asymmetric clump
- Persistence: deciduous
- Origin: native
Underside of a frond. The sori (spore-bearing dots) are oblong, but they often run together, making their shape hard to discern.