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Published In: Species Muscorum Frondosorum 64. 1801. (Sp. Musc. Frond.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 6/23/2009)
Acceptance : Accepted
Project Data     (Last Modified On 10/30/2017)
Plant Category: Moss

Notes     (Last Modified On 10/30/2017)
general taxon notes:

Weissia contains nearly 100 species distributed worldwide; about 10 species in the Neotropics. Two species are recognized in Bolivia.


Weissia contiene casi 100 especies distribuidas en todo el mundo;  aproximadamete 10 especies en el Neotrópico. Dos especies han sido reconocidas en Bolivia.


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Plants small, forming short, small tufts. Stems erect, few branched by innovations. Leaves contorted and twisted when dry, spreading when wet, narrowly oblong-lanceolate, apex acute, apiculate; margins involute to incurved; costae single, strong, short excurrent as an apiculate pellucid awn, in cross-section stereid band above and below guide cells; upper laminal cells short hexagonal or subquadrate, papillose; basal and lower cells short-rectangular, smooth. Autoicous or dioicous. Perichaetia terminal; leaves similar. Setae elongate. Capsules erect, urn ovoid, obloid-short cylindrical; opercula long rostrate, oblique; peristome single, teeth 16, partially to fully divided, fragile or often rudimentary, low basal membrane present or absent, papillose. Calyptrae cucullate, smooth and naked. Spores lightly papillose.


Plantas pequeñas, formando manojos cortos y pequeños. Tallos erectos, poco ramificados por innovaciones. Hojas contortas y torcidas en seco, patentes en húmedo, angostamente oblongo-lanceoladas, ápices agudos, apiculados; márgenes involutos hasta incurvados; costa simple, fuerte, corto-excurrente como una arista apiculada pelúcida, en corte transversal bandas de estereidas encima y debajo de las células guía; células superiores de la lámina corto-hexagonales o subcuadradas, papilosas; células basales e inferiores corto-rectangulares, lisas. Autoicas o dioicas. Periquecios terminales; hojas similares. Setas alargadas. Cápsulas erectas, urna ovoide, corto-obloide cilíndrica; opérculo largo-rostrado, oblicuo; peristoma simple, 16 dientes, parcialmente hasta completamente partidos, frágiles o a menudo rudimentarios, membrana basal baja presente o ausente, papilosa. Caliptra cuculada, lisa y desnuda. Esporas finamente papilosas.


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1. Leaves 3-4.5 mm long, costa at base ca. 80 µm or more wide; plants dioicous … W. jamaicensis
1. Leaves ca. 1-2.5(3) mm long, costa at base 25-60(70) µm wide; plants autoicous … W. controversa
1. Hojas 3-4.5 mm de largo, costa en la base aprox. 80 µm o más ancha; plantas dioicas … W. jamaicensis
1. Hojas aprox. 1-2.5(3) mm de largo, costa en la base 25-60(70) µm de ancho; plantas autoicas … W. controversa
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