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Description: |
This alga forms curled, fanlike branches from a single stalk. The plant is about 15 cm tall. Blades are often irregularly split and branched. The upper surfaces of the fans are calcified and whitened, but the rest of the plant is brownish. All the branches are crossed by closely set growth lines. Plants fan-shaped, becoming split with age, usually growing in small groups or communities, attached by conical holdfast of rhizoids, usually erect; growth from marginal meristem lining leading edge of blade, with apical cells enclosed in inrolled (involute) margin at terminal portions of frond; when blade unrolls, portion being exposed becoming inner side, opposite side (or back of roll) becoming outer side; frequently calcified on one or both surfaces. Below inrolled margin, rows of hairs or their scars forming arching lines from one lateral margin to other, floowed proximally by line of sporangia or another hair line preceding sporangial row; in some species, hair lines close to sporangial line, in others distant. Hair and sporangial lines may alternate on either side of frond (inner and outer sides), thus providing several different arrangements for different species. Blades usually two to several cells thick, not conspicuously differentiated into medulla and cortex. Original publication: Børgesen, F. (1914). The marine algae of the Danish West Indies. Part 2. Phaeophyceae. Dansk Botanisk Arkiv 2(2): 68, 44 figs.
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| References |
Dawes, C.J. & Mathieson, A.C. (2008). The seaweeds of Florida. pp. [i]- viii, [1]-591, [592], pls I-LI. Gainesville, Florida: University Press of Florida. Ni-Ni-Win, Hanyuda, T., Arai, S., Uchimura, M., Prathep, A., Draisma, S.G.A., Soe-Htun & Kawai, H. (2010). Four new species of Padina (Dictyotales, Phaeophyceae) from the western Pacific Ocean, and reinstatement of Padina japonica. Phycologia 49: 136-153. Pedroche, P.F., Silva, P.C., Aguilar Rosas, L.E., Dreckmann, K.M. & Aguilar Rosas, R. (2008). Catálogo de las algas benthónicas del Pacífico de México II. Phaeophycota. pp. [i-viii], i-vi, 15-146. Mexicali & Berkeley: Universidad Autónoma Metropolitana and University of California Berkeley. Womersley, H.B.S. (1987). The marine benthic flora of southern Australia. Part II. pp. 481, 169 figs, 1 table, 8 plates, 4 maps. Adelaide: South Australian Government Printing Division. |
| Type information: |
Type information
Type locality: St Croix, Virgin Islands (Silva, Basson & Moe 1996: 606). Type: C (Womersley 1987: 219). |
