J. Linn. Soc., Bot.10: 182. 1868
Etymology: Greek akros, top, and poros, pore, possibly alluding to tubulose points of branches
Found in FNA Volume 28. Treatment on page 572. Mentioned on page 571, 646.
Plants small, yellowish to golden yellow, glossy. Stems 1[–10] cm, not or weakly complanate-foliate, irregularly to regularly pinnate or sometimes simple. Leaves imbricate or strongly divergent, sometimes somewhat falcate, narrowly to broadly ovate-lanceolate; margins entire; apex acute to acuminate; costa double or ecostate; alar cells elongate, inflated, pigmented, walls thin, region in 1 row, middle lamella not apparent, supra-alar cells not apparently differentiated; laminal cells narrowly rhomboid to linear, smooth or rarely 1-papillose. Sexual condition autoicous [synoicous, dioicous, or phyllodioicous]. Seta 0.4–0.7 cm. Capsule erect to inclined, ovoid to cylindric; exothecial cell walls collenchymatous; operculum conic, finely rostrate.
Fla., Mexico, Central America, South America, Asia, Africa, Pacific Islands, Australia, tropical and subtropical regions, predominantly Indo-Malaysia.
Species ca. 60 (1 in the flora).