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Published In: Bericht über die Thätigkeit der St. Gallischen Naturwissenschaftlichen Gesellschaft 1871–72: 354 (Gen. Sp. Musc. 1: 202). 1873. (Ber. Thätigk. St. Gallischen Naturwiss. Ges.) Name publication detail

Project Name Data (Last Modified On 1/29/2013)
Acceptance : Accepted
Project Data     (Last Modified On 10/6/2017)
Plant Category: Mosses
country distribution: Venezuela, Colombia, Ecuador, Peru, Bolivia
EcoRegions: Montane Forest, Open montane, Wet coastal pacific (Chocó), Amazon (incl. Llanos)
elevation: 0-500, 500-1000, 1000-1500, 1500-2000, 2000-2500, 2500-3000
substrate: soil, rocks
frequency: common

Notes     (Last Modified On 10/6/2017)
Ecology: Lowland to montane forest; shaded to more often exposed sites, frequent along streams, on soil and soil covered rocks. Elevation: 10-2700 m (Venezuela: 40-2155 m, Colombia: 10-2440 m, Ecuador: 310-2700 m, Peru: 350-2150 m, Bolivia: 170-2200 m). Distribution: Nearly pantropical, extending into the Northern Hemisphere.
Hyophila involuta is distinguished by the spathulate to oblong-elliptical leaves to 2.5 mm, rounded-obtuse apex, plane to broadly incurved, entire or weakly dentate margins, distal lamina cells bulging on ventral side and smooth on dorsal side (papillae absent), rather large and thin-walled, rectangular cells differentiated at basal juxtacostal region, propagula occasionally present. A distinctive field character, combined with habitat, is the tubulose and incurved form of the leaves when dry.
Hyophila involuta se distingue por las hojas espatuladas a oblongo-elípticas hasta 2.5 mm, ápice redondeado-obtusos, planos a anchamente incurvados, márgenes enteros o débilmente dentados, células distales de la lámina abultadas en el lado ventral y lisas en el lado dorsal (papilas ausentes), células diferenciadas en la región basal yuxtacostal, rectangulares, bastante grande y con paredes delgadas, propágulos ocasionalmente presentes. Una característica distintiva en campo, además del hábitat, es la forma de las hojas tubulosas e incurvadas en seco.


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Plants small to medium sized, forming loose to dense tufts, dull green, often blackish or blackish-brown below. Stems erect, 0.5-1.5 cm tall, few to several branched; in cross-section outer 1-2 rows of cells rather small, thick-walled, inner cells large, thin-walled, central strand present. Leaves oblong-obovate to ± spathulate, 1.5-2.5 mm long, to 0.8 mm wide, apex acute to obtuse, often apiculate or mucronate; margins entire below, distally irregularly serrate to dentate or subentire; costae single, rather strong, percurrent, in cross-section stereids above and below guide cells; lamina unistratose, median cells quadrate-rounded to oval, 4-6 µm in diameter, thick-walled, mammillose, bulging on upper surface; basal cells rectangular, 20-30 µm long, 10-14 µm wide, rather thin-walled and lax. Propagula occasionally present in distal leaf axils, produced terminally on cylindrical stalked cells; propagula simple or branched, to ca. 160 µm long, smooth. Dioicous. Perichaetia terminal; leaves similar to stem leaves. Setae elongate, to 7 mm long, slender, smooth. Capsules erect, urn cylindrical, 1.2-1.6 mm long; opercula conic-rostrate; peristome absent. Calyptrae cucullate, smooth and naked. Spores spherical, smooth to lightly papillose.
Plantas pequeñas hasta medianas, formando manojos laxos hasta densos, verde opacas, a menudo negruzcas o pardo-negruzcas en la porción inferior. Tallos erectos, 0.5-1.5 cm de alto, poco a muy ramificados; en corte transversal 1-2 filas externas de células bastante pequeñas, con paredes gruesas, células internas grandes, con paredes delgadas, cordón central presente. Hojas oblongo-obovadas hasta ± espatuladas, 1.5-2.5 mm de largo, hasta 0.8 mm de ancho, ápices agudos hasta obtusos, a menudo apiculados o mucronados; márgenes enteros abajo, irregularmente serrados a dentados o subenteros en la porción distal; costa simple, bastante fuerte, percurrente, en corte transversal estereidas encima y debajo de las células guía; lámina uniestratificada, células mediales cuadrado-redondeadas hasta ovales, 4-6 µm de diámetro, con paredes gruesas, mamilosas, abultadas sobre la superficie superior; células basales rectangulares, 20-30 µm de largo, 10-14 µm de ancho, con paredes bastante delgadas y laxas. Propágulos ocasionalmente presentes en las axilas de las hojas distales, producidas en células cilíndricas del tallo?{stalked}; propágulos simples o ramificados, ca. hasta160 µm de largo, lisos. Dioicas. Periquecios terminales; hojas similares a las hojas del tallo. Setas alargadas, hasta 7 mm de largo, delgadas y lisas. Cápsulas erectas, urna cilíndrica, 1.2-1.6 mm de largo; opérculo cónico-rostrado; peristoma ausente. Caliptra cuculada, liso y desnuda. Esporas esféricas, lisas hasta finamente papilosas.


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