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Order Ectocarpales

Family Scytosiphonaceae

Rosenvingea intricata (J.Agardh) Børgesen 1914: 26

Plants yellowish-brown to pale brown, comprising soft, cushion-like masses of entangled, branched cylindrical to flattened thalli. Main branches 2-5 mm in diameter, tapering sharply to ca. 0.5 mm near branch tips; branches often adhering to each other. Branches hollow, with wall of 3 cell layers, cells of outer layer pigmented, 12-14 µm in diameter. Bundles of hairs scattered over surfaces. Plurilocular sporangia developing from epidermal cells, in sori.

Collections, ecology and regional distribution

Apparently rare on our coast. Recorded from a few sheltered localities: Hluleka to northern Kwazulu-Natal (45-58).

World distribution: worldwide in tropical and warm temperate seas.

Type locality: Veracruz, Mexico (Silva et al. 1996).

Note: the only specimen in BOL is unsuitable for illustration, so we have re-drawn the illustration of Tanzanian material from Jaasund (1976).

 


Rosenvingea intricata, re-drawn from Fig 97, Jaasund (1976)

 

References Rosenvingea

Børgesen, F. (1914). The marine algae of the Danish West Indies. Part 2. Phaeophyceae. Dansk Botanisk Arkiv 2(2): 68, 44 figs.

Jaasund, E. (1976). Seaweeds in Tanzania: A field guide. pp. 160. Tromsø: University of Tromsø.

Silva, P.C., Basson, P.W. & Moe, R.L. (1996). Catalogue of the benthic marine algae of the Indian Ocean. University of California Publications in Botany 79: 1-1259.

 

Cite this record as:

Anderson RJ, Stegenga H, Bolton JJ. 2016. Seaweeds of the South African South Coast.
World Wide Web electronic publication, University of Cape Town, http://southafrseaweeds.uct.ac.za; Accessed on 20 September 2018.