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Weissia: The Tiny Moss with a Big Story

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20161111_152400.jpg from: https://southwalesbryos.blogspot.com/2016/11/weissia-sterilis.html

Weissia novae-valesiae: The Tiny Moss with a Big Story

Introduction

When it comes to the world of mosses, Weissia novae-valesiae is a fascinating species that often goes overlooked. This tiny moss, also known simply as Weissia

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P1020737.JPG from: https://southwalesbryos.blogspot.com/2014/11/which-weissia.html

, belongs to the Pottiaceae family and has a unique story to tell. In this blog post, we’ll dive into the details of Weissia novae-valesiae and explore what makes this little plant so special.

Background

Weissia novae-valesiae is a species of moss first described by Viktor Ferdinand Brotherus and Georg Roth in the early 20th century. The species epithet “novae-valesiae” refers to its discovery in Nouvelle-Valais, Switzerland. As a member of the Bryophyta division and Bryopsida class, Weissia is a true moss.

Morphology and Identification

Weissia novae-valesiae is a small, cushion-forming moss that typically grows in dense tufts. Its leaves are lanceolate to linear-lanceolate in shape, usually around 2-3 mm long. The leaf margins are often recurved, and the leaf cells are small and rounded. Weissia can be identified by its reddish-brown

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Weissia-controversa-2-700×466.jpg from: https://ohiomosslichen.org/moss-weissia-controversa/

to yellowish-green

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rick_borchelt_45529345504_1b2ba3d922_b.jpg from: https://www.marylandbiodiversity.com/media/viewThumbnails.php?species=10917&showAll=1

coloration and its characteristic capsules, which are ellipsoidal and borne on short setae.

Global Distribution and Habitat

Weissia novae-valesiae has a wide distribution, found across Europe, Asia

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con-w-m-1-1_1.jpg from: https://www.fredswildflowers.com/weissia.html

, Africa

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Weissia-contoversa-habit-sh.jpg from: https://sites.cortland.edu/bryophytes/field-guide/mosses/acrocarp/weissia-controversa/

, and North America. It typically grows on calcareous soils or rocks, often in dry, exposed habitats such as cliffs, ledges, and open grasslands. This adaptable moss can tolerate a range of environmental conditions.

Ecological Roles and Adaptations

Despite its small size, Weissia novae-valesiae plays important ecological roles. Like other mosses, it helps to retain moisture

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Weissia_controversa-dens_001.JPG from: https://cisfbr.org.uk/Bryo/Cornish_Bryophytes_Weissia_controversa_var_densifolia.html

in its environment, prevent soil erosion, and provide habitat for microorganisms. Weissia has adapted to survive in dry conditions through its ability to

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Weissia_rutilans_3b.JPG from: https://cisfbr.org.uk/Bryo/Cornish_Bryophytes_Weissia_rutilans.html

quickly absorb and retain water when it becomes available. Its small size and dense growth habit also help to minimize water loss.

Conclusion

Weissia novae-valesiae may be a tiny moss, but it has a fascinating story and plays important roles in its ecosystems. From its unique morphology to its global distribution and ecological adaptations, this little plant is a testament to the incredible diversity and resilience of mosses. The next time you’re out in nature, take a closer look – you might just spot a patch of Weissia novae-valesiae thriving in an unexpected place. What other secrets might these tiny plants hold?

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