Portieria hornemannii (Lyngbye) P.C.Silva

Division     Rhodophyta
Class     Florideophyceae
Order     Gigartinales
Family    Rhizophyllidaceae
Basionym     Desmia hornemannii Lyngbye
SynonymSphaerococcus lambertii var. gelatinosus Suhr; Plocamium cincinnatum Montagne; Portieria coccinea Zanardini; Desmia ambigua J.Agardh; Desmia coccinea (Zanardini) Zanardini; Desmia lambertii Grunow; Desmia pulvinata J.Agardh; Chondrococcus lambertii (Grunow) F.Schmitz; Chondrococcus ambiguus (J. Agardh) Heydrich; Chondrococcus hornemannii f. lambertii (Grunow) De Toni; Portieria hornemannioides Kendrick, Huisman & Walker

    Thalli 3- 7 cm high, dark red, consisting of several flattened axes, 0.6–2 mm wide and 0.4-0.5 mm in diameter. Thalli attached by means of discoid holdfast, 1-4 mm diameter. Branching alternate to subdichotomous or pinnate, in a single plane up to 7 orders; ultimate branches slightly tapered with strongly incurved apices. Simple dentations scarce on laterals. Internal structure shows ovoid, thick-walled, single axial cell and conspicuous, up to 165 in diameter; medullary cells globose, decreasing in diameter toward the periphery, 40-67 μm in diameter, quickly grading into a pigmented cortex; cortical cells rounded, often elongate, small, arranged in anticlinal filaments, 5-23 µm long and 8-14 μm broad.



Distribution in India

Cape Comorin, Krusadai Island, Pamban, Tiruchendur, Tuticorin (Tamil Nadu) (Boergesen, 1933, 1937; Chacko et al., 1955; Krishnamurthy 1985)); Nicobar Islands (De Toni, 1905), Andaman Islands.