Riccia violacea M.Howe

  • Authority

    Britton, Nathaniel L. & Millspaugh, Charles F. 1920. The Bahama Flora.

  • Family

    Ricciaceae

  • Scientific Name

    Riccia violacea M.Howe

  • Description

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    Species Description - Thallus small, 1.5-4 mm. long, simple or 1-3 times dichotomous, irregularly gregarious, rather obscurely and finely reticulate and dark green above, dark violet or blackish at margins and on sides; main segments 0.6-1.15 mm. wide; margins obtuse or rounded, commonly erect-connivent or inflexed on drying, bearing especially toward the apex and often low on the sides numerous or occasional violet or sometimes hyaline conic or subcylindric acute or obtuse papillae 20-110 µ long and 25-45 µ broad at base; scales very short or rudimentary, dark violet, rarely overlapping, commonly divided into a series of small irregular often tooth-like laciniae, each consisting of only a few cells; transverse sections 1.52 times as broad as high; dioecious ('?); antheridial ostioles elevated 20-150 µ often violet; spores soon fuscous and very opaque, 80-105 µ. in maximum diameter, obscurely angled or flattened-sphaeroid, destitute of wing margins, finely, irregularly, indistinctly, and almost uniformly areolate over whole surface, the areolae 7-11 µ wide, soon very obscure and the spores appearing minutely and densely verruculose.

  • Distribution

    On moist ground, Eleuthera : Mona Island ; Puerto Rico ; Cuba ; and northern Mexico. Violet Riccia.

    Eleuthera Bahamas South America| Mayagüez Puerto Rico South America| Puerto Rico South America| Cuba South America| México Mexico North America|