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Published In: Index Bryologicus 557. 1896. (Index Bryol.) Name publication detailView in Biodiversity Heritage Library

Project Name Data (Last Modified On 1/26/2013)
Acceptance : Accepted
Project Data     (Last Modified On 10/6/2017)
Plant Category: Mosses
General Reference:

Notes     (Last Modified On 10/6/2017)
Hennediella contains 15 species, with the greatest diversity in the Southern Hemisphere (Cano 2008). In the Tropical Andes species are found on moist to wet soil, or possibly rocks; high open montane to páramo and puna, at elevations from about 2200-4800 m. The broad spathulate or lanceolate leaves usually with a distinct border and rather sharply toothed margins characterizes several of our species. The genus may be closely related to Dolotortula. The genus, as defined by Zander (1993), contains elements previously associated with Desmatodon, Pottia and Tortula. The treatment follows and is adapted from Cano (2008). The generic name honors the Scottish phycologist Roger Hennedy (1809-1877).
Hennediella contiene 15 especies, con la mayor diversidad en el hemisferio sur (Cano 2008). En los Andes tropicales seis especies han sido registradas. Las hojas ancho-espatuladas o lanceoladas generalmente con un borde conspicuo y márgenes con dientes muy marcados son algunas características de nuestra especie. El nombre genérico hace honor al ficólogo escocés Roger Hennedy (1809-1877).


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Plants mostly medium sized, forming loose tufts olive to light green above, brown or brownish black below. Stems erect, occasionally laxly so, few several branched; in cross-section hyalodermis absent or present with cells collapsed or not, outer 2-3 rows slightly differentiated with cells smaller and somewhat thick-walled, inner cells larger, thin-walled, or cells ± uniform, central strand weak; radiculose, rhizoids appearing smooth. Leaves appressed to incurved above an appressed sheathing base when dry, erect-spreading to spreading when wet, broadly lanceolate to oblong-spathulate, to ca. 5 mm long, flat to channeled distally, apex narrowly to broadly acute or rounded and apiculate or not; margins plane to rarely recurved, dentate to serrate, often sharply so, limbate; costa percurrent to short excurrent, rarely subpercurrent, upper superficial cells mostly short rectangular, smooth or papillose, lower cells elongate, smooth, in cross-section a single stereid band below guide cells, upper surface cells distinct; upper cells quadrate, short rectangular or hexagonal, smooth to more commonly pluripapillose, papillae several, simple to bifid, thin- to firm-walled; basal cells long rectangular, rather lax, thin-walled; margins cells forming a border, 2-12 rows of mostly long rectangular, smooth cells. KOH leaf color reaction red. Autoicous or dioicous. Perichaetia terminal; leaves slightly larger, otherwise similar. Setae to 15 mm or more long, rather slender, twisted, smooth. Capsules erect to slightly curved, cylindrical, to 4 mm long; exothecial cells rectangular, thin-walled; stomata at urn base, superficial; annulus in 2-3 rows, persistent; opercula long-conic to -rostrate; peristome absent or single with basal membrane high, teeth 32 long, spirally arranged filaments, spiculose. Calyptrae cucullate, smooth and naked. Spores ± spherical, faintly to distinctly papillose.
Plantas generalmente medianas, formando manojos laxos, verde oliva hasta pálidas arriba, pardas o negro parduscas abajo. Tallos erectos, ocasionalmente laxos, poco a muy ramificados; en corte transversal hialodermis ausente o presente con células colapsada o no, 2-3 filas externo escasamente diferenciadas con células menores y con paredes gruesas, células internas mayores, con paredes delgadas, o células ± uniformes, cordón central débil; radiculosos, rizoides de apariencia lisa. Hojas adpresas hasta incurvadas encima de la base envainadora adpresa en seco, erecto-extendidas hasta patentes en húmedo, ampliamente lanceoladas hasta oblongo-espatuladas, aproximadamente hasta 5 mm de largo, planas hasta acanaladas distalmente, ápices angostamente hasta ampliamente agudos o redondeados y apiculados o no; márgenes planos rara vez recurvados, dentados hasta serrados, a menudo marcadamente serrados, limbados; costa percurrente hasta corto-excurrente, rara vez subpercurrente, células superficiales superiores generalmente corto-rectangulares, lisas o papilosas, células inferiores alargadas, lisas, en corte transversal sólo una fila de estereidas debajo de las células guía, células de la superficie superior conspicuas; células superiores cuadradas, corto-rectangulares o hexagonales, lisas a más comúnmente pluripapilosas, varias papilas, simples hasta bífidas, con paredes firmes a delgadas; células basales largo-rectangulares, bastante laxas, con paredes delgadas; células del margen formando un borde, 2-12 filas de células generalmente largo-rectangulares, lisas. En la reacción con KOH la hoja se torna roja. Autoicas o dioicas. Periquecios terminales; hojas escasamente mayores, por lo demás similares. Setas hasta 15 mm o más largas, bastante delgadas, torcidas y lisas. Cápsulas erectas hasta escasamente curvadas, cilíndricas, hasta 4 mm de largo; células exoteciales rectangulares, con paredes delgadas; estomas en la base de la urna, superficiales; anillo en 2-3 filas, persistente; opérculo largo-cónico hasta -rostrado; peristoma ausente o simple con membrana basal alta, 32 dientes largos, filamentos dispuesto en espiral, espiculados. Caliptra cuculada, lisa y desnuda. Esporas ± esféricas, débil a conspicuamente papilosas.

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1. Leaf border Intramarginal, cells rectangular to linear in 2-4 rows, edged on margin by 1-2(3) rows of short-rectangular, quadrate or oblate cells; leaf margins papillose-crenulate near the apex, without teeth … H. bellii
1. Leaf border marginal, cells of leaf border quadrate to linear, in 1-13 rows, usually not as an intramarginal border; leaf margins usually denticulate to dentate near the apex, rarely without teeth … 2.
2. Leaf margins irregularly or regularly bistratose … 3.
2. Leaf margins unistratose … 4.
3. Leaf with (8)16-52(58) teeth per margin, distal 2/3 of margin toothed; leaf border (5)6-9(11) marginal cell rows … H. polyseta
3. Leaf with (1)2-12(19) teeth per margin, distal 1/3 of margin toothed; leaf border of 2-6(7) marginal cell rows … H. longirostris
4. Inner middle marginal cells long-rectangular to linear [length/width: (4)6-19.8(23.5)]; leaf with (8)22-49(58) teeth per margin in distal 2/3 … 5.
4. Inner middle marginal cells quadrate to rectangular, rarely linear or rounded [length/width: (0.4)1-1.3(7.5)]; leaf without or with 2-8 teeth per margin in distal 1/3 … 6.
5. Leaves elliptic to oblong-elliptic, occasionally orbicular or lingulate; middle laminal cells 17.5-22.5(27.5) µm wide, smooth, rarely papillose; peristome present … H. denticulata
5. Leaves lanceolate to ovate-lanceolate or oblong-ovate; middle laminal cells 10-15 µm wide, papillose; peristome absent … H. polyseta
6. Plants 0.2-0.8(1.4) mm high, without or with some lateral innovations; leaves frequently keeled distally, 0.8-0.9 mm wide; operculum cells in spirally twisted rows … H. steereana
6. Plants (0.8)1.2-2.1 mm high, with numerous lateral innovations; leaves not keeled distally, 0.4-0.7 mm wide; operculum cells in straight rows … H. heimii
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