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Publicado en: Die Natürlichen Pflanzenfamilien 1(3): 634. 1904. (Nat. Pflanzenfam.) Name publication detailView in Biodiversity Heritage Library

Datos del Proyecto Nombre (Last Modified On 11/4/2012)
Aceptación : Accepted
Datos del Proyecto     (Last Modified On 10/8/2017)
Plant Category: Mosses
General Reference:

Notas     (Last Modified On 10/8/2017)

A genus of some 10 species confined primarily to the Neotropics. Leiomela is characterized by the narrowly long lanceolate or linear leaves, little differentiated leaf base (not sheathing), upper laminal cells papillose on one or both ends, capsules immersed, and smooth. The genus is the only member of the Bartramiaceae in which some of the species are epiphytic in the tropical Andes.


Un género con 10 especies distribuidas principalmente en el Neotrópico. Leiomela se distingue por sus hojas lineales o angostamente largo-lanceoladas, bases de las hojas poco diferenciadas (no amplectantes), células superiores de la lámina papilosas en uno o ambos extremos, cápsulas inmersas y lisas. Este género es el único de la familia Bartramiaceae en tiene algunas especies epífitas en los Andes tropicales.


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Plants mostly medium sized, forming dense tufts, yellowish-green to dark green. Stems erect, few to several branched; in cross-section epidermal cells small and thick-walled, central strand present; densely tomentose, rhizoids papillose. Leaves loosely erect to erect-spreading, oblong-narrowly lanceolate or subulate, apex broadly to narrowly acuminate; margins plane to reflexed, serrate to near base; costae single, subpercurrent to long excurrent, often toothed on back; upper and median cells (above base) oblong-short to long rectangular, papillose, papillae projecting at distal cell angles, thick-walled; basal cells linear-rectangular or oblong long rectangular, usually smooth, somewhat porose; alar region undifferentiated. Synoicous or dioicous. Perichaetia terminal; leaves longer than stem leaves, long-lanceolate, occasionally very long subulate. Setae short, 1-2 mm long, smooth. Capsules erect, urn subglobose, when dry somewhat globose-pyriform, mouth small; peristome fragile and often absent. Spores often coarsely papillose.


Plantas generalmente medianas, formando manojos densos, de color verde-amarillento hasta verde oscuro. Tallos erectos, poco o muy ramificados; en corte transversal células epidérmicas pequeñas y con paredes gruesas, cordón central presente; densamente tomentosos, rizoides papilosos. Hojas laxamente erectas hasta erecto-extendidas, oblongo-estrecho lanceoladas o subuladas, ápices anchamente hasta angostamente acuminados; márgenes planos hasta reflexos, serrados cerca de la base; costa simple, subpercurrente hasta largo-excurrente, a menudo dentada en el envés; células superiores y mediales (encima de la base) corto-oblongas hasta largo-rectangulares, papilosas, papilas proyectándose desde los ángulos distales de la célula, paredes celulares gruesas; células basales lineo-rectangulares o largo oblongo-rectangulares, generalmente lisas, algo porosas; región alar indiferenciada. Sinoicas o dioicas. Periquecios terminales; hojas más largas que las hojas del tallo, largo-lanceoladas, ocasionalmente muy largo subuladas. Setas cortas, 1-2 mm de largo, lisas. Cápsulas erectas, urna subglobosa, algo globoso-piriforme en seco, boca pequeña; peristoma frágil y a menudo ausente. Esporas a menudo gruesamente papilosas.


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1. Leaf apices slenderly long acuminate to ± subulate, leaf base slightly expanded; costa appearing long excurrent … 2.
1. Leaf apices broadly acuminate, leaf base ± equal in width to upper lamina; costa ending below acumen or leaf tips deciduous … 3.
2. Perichaetial leaves ca. 3 or more times longer than stem leaves; plants terrestrial … L. aristifolia
2. Perichaetial leaves less than 2 times longer than stem leaves; plants epiphytic … L. bartramioides
3. Distal leaf limb erect-spreading to spreading (leaf tips commonly deciduous) … L. ecuadorensis
3. Distal leaf limb mostly erect (leaf tips deciduous or not) … 4.
4. Leaf tips commonly deciduous … L. deciduifolia
4. Leaf tips mostly retained … L. lopezii
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