Pterogonium productum Hornschuch, Linnaea 15: 138. 1841; Forsstroemia ohioensis (Sullivant) Lindberg; Leptodon ohioensis Sullivant

Stem and branch leaves ovate to ovate-acuminate, 1.1-1.7 × 0.6-1 mm; costa single, 1/2 -4/5 leaf length; laminal cells isodiametric to short-oblong, 1-3:1; medial cells 13-23 × 9-12 µm. Sexual condition gonioautoicous. Seta 1.3-2.1 mm. Capsule emergent or exserted, 1.2-2 × 0.4-0.7 mm; operculum 0.4-0.8 × 0.3-0.5 mm; exostome teeth smooth to granulose. Spores 15-35 µm.

Capsules mature winter. Epiphytic on trees, boulders; moderate elevations; Ark., Mo., Ohio, Va.; Mexico (Hidalgo, Nuevo León, Tamaulipas); South America; e Asia; Africa; e Australia.

Forsstroemia producta is known from only five sites in the flora area. Recent efforts to recollect it in Ohio were unsuccessful. The interval of fertilization is in late summer and autumn; growth intervals are usually defined by vegetative branches. The secondary stems are erect or somewhat curved; the leaves are imbricate; and the exostome teeth have well-defined plates and occasionally additional external depositions.