3. Henicodium (Müller Hal.) Kindberg, Enum. Bryin. Exot. 16. 1888. • [Greek henicos, single, alluding to single, unbranched stems arising from creeping primary stems].
William R. Buck
Hypnum sect. Henicodium Müller Hal., Linnaea 39: 470. 1875; Leucodontopsis Renauld & Cardot
Plants 1-2 cm, bright green, yellow-green, or bronze, somewhat glossy. Stems without stipe, simple or rarely branched. Stem leaves not seriate, appressed when dry, spreading when moist, oblong-lanceolate to oblong-ovate, plicate; base not auriculate, somewhat decurrent; margins revolute from mid alar region just proximal to apex; costa single, 2/3 leaf length; alar cells well differentiated, oblate, region large, conspicuous; medial laminal cells linear-flexuose, 1-papillose or rarely smooth, walls ± porose. Branch leaves when present, similar to stem leaves. [Seta 0.6 cm. Capsule short-cylindric; operculum unknown]. Calyptra unknown.
Species 1: Florida, Mexico, West Indies, Central America, South America, se Asia, Africa.
Henicodium is distinguished by mostly simple, erect stems with revolute-margined leaves. The laminal cells are 1-papillose (individual leaves may sometimes be smooth) and the costa ends well before the leaf apex. Gemmae are regularly produced on older stems in large clusters in distal leaf axils.
SELECTED REFERENCE Buck, W. R. 1989. Henicodium replaces Leucodontopsis (Pterobryaceae). Bryologist 92: 534.