Syn. Musc. Frond. 2: 8. 1850.
Plants 2.5–4 cm. Leaves of stipe and basal fronds in 3 or 11+ rows, 1–1.5 mm; dorsal frond leaves absent from stipe; distal stipe leaves asymmetric, 0.8–1 mm, margins serrate in distal 1/2; all leaves ovate; costa short or to 1/2–2/3 leaf length. Perichaetia with paraphyses present. Seta 1.5 cm, smooth. Capsule 1 mm; operculum long-rostrate, 1.5 mm.
Phenology: Capsules mature fall.
Habitat: Limestone sinks
Elevation: low elevations (0 m)
Fla., Mexico, West Indies, Central America, South America, se Asia, c Africa, Indian Ocean Islands, Pacific Islands.
Of conservation concern.
Hypopterygium tamariscina, of pantropical distribution, was reported once from Alachua County, Florida (M. W. Diddell and E. M. Shields 1943), in a lime sink about 7 km southeast of Newberry (NY). It differs from H. flavolimbatum in lacking dorsal frond leaves on its basal stipe, having stipe and basal frond leaves in three or eleven or more rows, and paraphyses present. This species has apparently been extirpated from the flora area according to J. D. Kruijer (2002); the next closest station is in Cuba.