Monographs Details: Dasyopsis antillarum M.Howe
Authority: Britton, Nathaniel L. & Millspaugh, Charles F. 1920. The Bahama Flora.
Family:Dasyaceae
Description:Species Description - Plants dark vinaceous-purple, claret-brown, or orange-rufous, 4-10 cm. high, rather copiously, irregularly and radially branched, or quasi-pinnate, occasionally subdichotomous below; main axes subterete or slightly flattened, 1-2.5 mm. in diameter; principal branches showing more or less numerous subspinescent branchlets 1-3 mm. long, the surface clothed at and near the apices, or sometimes to bases of the branches and branchlets, with more or less tufted dichotomous, monosiphonous, often early deciduous ramelli, these springing chiefly from slightly elevated cushions or sorus-like spots, the segments mostly 15-26 µ in diameter, usually 3-6 times as long as broad; cortical cells mostly rather short, 12-70 µ long, 1-5 times as long as broad; stichidia fusiform, 300- 450 µ long, 75-150 µ in maximum width, borne close to the rhachides, on onecelled pedicels or sometimes apparently sessile on the rhachides, occasionally proliferous at apex and bearing short trichophylls.

Discussion:

On corals in shallow water and washed ashore, Fort George Cay, Caicos Islands (Howe 5625 type), and Atwood Cay. Dasyopsis Antillarum in color and in the character and arrangement of the monosiphonous ramelli bears some resemblance to small conditions of Dasya prJicellata, but differs in the more copious and more irregular branching, in having short subspinescent branchlets, in the shorter cortical cells, in the absence of visible pericentral siphons at the apices, in the more proximal location of the stichidia, etc. From the Bermudian Dasyopsis spinuligera (Collins & Hervey) M.A.Howe {Dasya spinuUgera Collins & Herv. Proc. Am. Acad. 53: 130, pi. k- f- H, 25. 1017), D. Antillarum differs in being much larger and coarser, in the more vinaceous-purple color, in the softer longer-celled monosiphonous ramelli, and in the shorter, more fusiform stichidia (the stichidia of D. spinuligera are eventually cylindric, with conic apex, and 600-800 w long by 75-80 w in diameter, and they are often geminate). From the Adriatic and Mediterranean Dasyopsis penicillaia and D. spinclla, the species differs much in habit and in not having the monosiphonous ramelli confined to the apices but springing irregularly from the cortex or from slightly elevated cushions or sorus-like areas.

Distribution:Turks and Caicos Islands South America|