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Published In: Journal of the Linnean Society, Botany 10: 182–184. 1868. (J. Linn. Soc., Bot.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 8/23/2009)
Acceptance : Accepted
Project Data     (Last Modified On 10/7/2017)
Plant Category: Mosses
General Reference:

Notes     (Last Modified On 10/7/2017)

Acroporium contains some 80 species primarily of the Paleotropics; about 3-4 species in the Neotropics; in the tropical Andes three species. Acroporium is distinguished by the tufted habit formed by ascending stems and branches, the deeply concave, usually distally tubulose leaves, strongly obliquely arranged, inflated, thick-walled, oblong alar cells, and exostome furrowed or not. Most species assigned to Acroporium were originally placed in Sematophyllum.


Acroporium contiene unas 80 especies principalmente del Paleotrópico; ca. 3-4 especie en el Neotrópico; en los Andes tropicales tres especies. Acroporium se distingue por su hábito fasciculado formado por tallos y ramas ascendentes, las hojas profundamente cóncavas, por lo general distalmente tubulosas, marcadamente dispuestas oblicuamente, inflado, pared celular gruesa, oblongas alar células, y exostoma acanalado o no. La mayoría de las especies asignadas a Acroporium estaban localizadas originalmente en Sematophyllum.


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Plants usually forming tufts, glossy green, yellowish-green or golden. Stems initially short creeping then ascending to erect; central strand absent. Leaves erect to erect-spreading, narrowly to broadly ovate to oblong-lanceolate, concave, apex long acuminate, base usually somewhat auriculate; margins distally enrolled, entire to slightly serrulate; laminal cells smooth (rarely unipapillose) upper and median cells linear, porose or not; basal cells shorter, strongly porose; alar cells differentiated, obliquely angled (45°), oblong-rectangular, inflated, thick-walled, usually golden-yellow or -brown. Autoicous. Perichaetia lateral. Setae elongate, slender and wiry. Capsules inclined to erect, urn ovoid, mouth flared when deoperculate; exothecial cells collenchymatous; stomata at urn base, superficial; opercula long-rostrate, oblique; peristome double, exostome finely cross-striate, distally papillose, weakly to strongly furrowed; endostome basal membrane high, segments 16, keeled and perforate. Calyptrae cucullate, smooth and naked. Spores spherical, lightly to densely papillose.


Plantas generalmente formando manojos, verdes brillantes, verde-amarillentas o doradas. Tallos inicialmente corto reptantes luego ascendentes a erectos; sin cordón central. Hojas erectas a erecto-extendidas, angostamente a anchamente ovadas a oblongo-lanceoladas, cóncavas, ápices largo acuminados, base generalmente algo auriculada; márgenes distalmente enrollados, enteros a escasamente serrulados; células de la lámina lisas (rara vez unipapilosas) células superiores y medias lineales, poroso o no; células basal cortas, marcadamente porosas; células alares diferenciadas, acomodadas oblicuamente en ángulo (45°), oblongo-rectangulares, infladas, con paredes gruesas, generalmente amarillo-doradas o -marrones. Autoicas. Periquecios laterales. Setas alargadas, delgadas y alambrinas. Cápsulas inclinadas a erectas, urna ovoide, boca {flared} cuando está desoperculadas; células exoteciales colenquimatosas, estomas en la base de la urna, superficiales; opérculo largo-rostrado, oblicuo; peristoma doble, exostoma con estrías finamente cruzadas, distalmente papiloso, débilmente a marcadamente acanalado; membrana basal del endostoma alta, segmentos 16, carinados y perforados. Caliptra cuculada, lisa y desnuda. Esporas esféricas, ligera a densamente papilosas.


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1. Leaf apices piliferous … A. esmeraldicum
1. Leaf apices gradually acuminate … 2.
2. Plants small, to 3 cm tall; leaves narrowly oblong-lanceolate, 1.2-1.5 mm long, 0.2-0.3 mm wide; margins distally reflexed… A. estrellae
2. Plants large, 2-10 cm tall; leaves broadly ovate- to oblong-lanceolate, 2.5-2.8 mm long, 0.6-0.7 mm wide; margins distally incurved… A. pungens
1. Hojas con ápice pilífero … A. esmeraldicum
1. Hojas con ápice gradualmente acuminado … 2.
2. Plantas pequeñas, hasta 3 cm de alto; hojas angostamente oblongo-lanceoladas, 1.2-1.5 mm de largo, 0.2-0.3 mm de ancho; márgenes distalmente reflexos… A. estrellae
2. Plantas grandes, 2-10 cm de alto; hojas ampliamente ovado- a oblongo-lanceoladas, 2.5-2.8 mm de largo, 0.6-0.7 mm de ancho; márgenes distalmente incurvados… A. pungens
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