Monographs Details: Valonia ocellata M.Howe
Authority: Britton, Nathaniel L. & Millspaugh, Charles F. 1920. The Bahama Flora.
Description:Species Description - Plants for the most part filamentous, densely cespitose or crustaeeous, the cushions, under favorable conditions becoming 10-20 cm. broad and 4-6 cm. thick ; the superior or dorsal parts consisting of small few-celled discs, or more often, oblong or linear, irregular, multicellular filaments mostly 1-4 cells broad, the cells polyhedral or angulate-subglobose, 0.45-0.9 mm. in maximum diameter,
with numerous small flattened ellipsoidal or lentiforni cells 50-90 µ. in long diameter along their separating walls; few or many of the ventral and lateral cells of the superior or dorsal facetted parts growing out into rather rigid descending stilt-like or root-like non-septate processes, mostly 5-30 mm. long and 0.5-0.8 mm. in diameter; occasional cells in dorsal parts enclosing few or numerous aplanospores 200-320 µ in diameter.
In shallow water in lagoons, on pneumatophores of Avicennia between the tidelines, and low-littoral on rocks, both in exposed and sheltered locations, common. New Providence, Bimini. Watling's Island, Atwood Cay. Mariguana, and Caicos Islands: Bermuda, Porto Rico, and American Virgin islands. Type, Howe 5090 from the great lake or lagoon of Watling's Island, Nov. 25, 1907.
Valpnia occllata is perhaps related to Dictuosjriiarria valonioides Zanard., which
Hauok believed to be a condition of Valonia macrophysa, but manifestly differs in
its smaller cells, in never being hollow, and rarely, if ever, globose, and in the
absence of large vesicular marginal cells. Specimens from Bermuda and the West
Indies have sometimes been referred to Valonia utricularis forma Crustacea Kuck.,
from which it differs in having its superior parts divided by cross-walls into more
or less polyhedral or angulate-subglobose cells instead of consisting of interwoven
and compacted clavate or obovoid cells. The plant bears some resemblance to young
stages of species of Dictyosphaeria but the small-celled or facetted parts are usually
elongate, vittate, or irregularly discoid, very rarely subglobose. It occurs in great
abundance in lagoons, often associated with Valonia Aegagropila and remaining perfectly
distinct. It is found in a great variety of habitats and it evidently deserves
a distinctive specific name, at least until such time as cultures may prove it to be
capable of assuming the characters of some previously described species.
New Providence Bahamas South America
| Bimini Bahamas South America
| Turks and Caicos Islands South America
| Bermuda South America
| Puerto Rico South America
| United States Virgin Islands South America