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Electronic Flora of South Australia Species Fact Sheet

Pollexfenia lobata (Hooker & Harvey) Falkenberg 1901: 295.

Phylum Rhodophyta – Family Rhodomelaceae – Tribe Pterosiphonieae

Selected citations: De Toni 1903: 979. Lucas 1909: 42; 1915: 57; 1929a: 22; 1929b: 51. Lucas & Perrin 1947: 278, fig. 125.


Jeannerettia lobata Hooker & Harvey in Harvey 1847: 20, pl. 4. J. Agardh 1863: 837; 1879: 198, pl. 33 figs 20–23. Fuhrer et al. 1981, pl. 36. Guiler 1952: 105. Harvey 1858: p1. 33; 1859b: 295; 1863, synop.: xvii. Hooker & Harvey 1847: 398. Huisman 1997: 205. Kützing 1866: 2, pl. 4e, f. May 1965: 399. Papenfuss 1942: 448. Reinbold 1898: 48. Shepherd & Womersley 1981: 368. Silva et al. 1996: 502. Sonder 1853: 697; 1880: 32. Tate 1882a: 22. Tisdall 1898: 513. Wilson 1892: 168. Womersley 1950: 188; 1966: 154.

Botryoglossum lobatum (Hooker & Harvey) Kützing 1849: 881.

Jeannerettia frondosa Harvey 1855a: 537.

Jeannerettia latifolia Kützing 1866: 2, pl. 6.

Thallus (Fig. 154A) erect, red-brown, 10–30 cm high, membranous, complanately branched, main branches (0.5–) 1–1.5 (–2) cm broad, with irregularly positioned laterals of similar or lesser width, branch apices rounded, margins smooth to irregular, with a central, prominent, midrib commencing from near apices to well down the thallus; fronds denuded below leaving the thickened midrib as a stalk 1–2 mm thick, often with small proliferous blades. Holdfast discoid, 2–5 mm across; epilithic. Structure. Branch apices with numerous apical cells producing congenitally fused systems (Fig. 154B), with the axial cells cutting off 4 pericentral cells (Fig. 154D), 2 on each side; apical cells hemispherical to conical, 7–12 µm in diameter, axial cells branching usually 2 cells apart, with unicellular primordia (some becoming multicellular and branched) cut off from the alternate cells on alternate sides of the thallus. Mature fronds have the apical margins apparently non-functional and coloured brown for 6–10 cells deep, this margin often split (Fig. 154C). The pericentral cells divide laterally giving 3–5 between adjacent veins (Fig. 154B), and also show transverse divisions with 6–10 corresponding to each mature axial cell; mature surface (derivative) cells are mostly 35–45 µm in diameter and 30–60 (–90) µm long, L/D mostly 1–1.5, and become irregularly arranged in surface view. Fronds 2 cells thick, with the midrib (Fig. 154D) formed by proliferation of cortical cells from the pericentral cell derivatives. Trichoblasts much branched, situated on the thallus surface above the axial cells, with the basal part becoming polysiphonous. Cells probably uninucleate; rhodoplasts discoid to elongate.

Reproduction: Reproduction is associated with the trichoblast tufts.

Gametophytes dioecious. Procarps on lower trichoblast cells, with 4-celled carpogonial branches. Carposporophytes branched, with clavate terminal carposporangia 20–40 µm in diameter. Cystocarps (Fig. 154E) ovoid, short-stalked, 800–1200 µm in diameter; pericarp ostiolate, 2 cells thick, ecorticate, outer cells isodiametric, 50–90 µm across. Spermatangial organs (Fig. 154F) on branches of trichoblasts, their stalks becoming polysiphorous, 90–160 µm in diameter and 200–400 1 µm long, ends rounded or tapering, with single sterile apical and basal cells, spermatangia ovoid, 5–7 µm in diameter.

Stichidia (Fig. 154G) on the basal, polysiphonous, part of trichoblasts, 120–200 µm in diameter and 500–750 µm long, corticated, with tetrasporangia in a close spiral, one per segment, 70–110 µm in diameter, with 2 cover cells.

Type from Port Arthur, Tas. (Jeannerett); holotype in BM.

Selected specimens: 7 mile beach, N of Dongara, W. Aust., drift (Womersley, 17.ix.1979; AD, A51357). Cottesloe, W. Aust., drift (Royce 1037, 12.vi.1951; AD, A16222). Waldegrave I., S. Aust., 30 m deep (Branden, 3.vii.1987; AD, A57589). Point Avoid, Eyre Pen., S. Aust., drift (Womersley, 2.xii.1975; AD, A46895). Off Troubridge Light, S. Aust., 18 m deep (Shepherd, 4.ii.1969; AD, A33559). Port Elliot, S. Aust., drift (Womersley, 23.v.1953; AD, A18718). Vivonne Bay, Kangaroo I., S. Aust., 3–4 m deep on jetty piles (Latz, 22.xi.1968; AD, A33025). Pennington Bay, Kangaroo I., S. Aust., drift (Womersley, 22.viii.1954; AD, A19758). Robe, S. Aust., in shaded pool (Womersley, 27.viii.1949; AD, A11077). 600 m off Middle Point, Cape Northumberland, S. Aust., 5 m deep (Shepherd & Johnson, 19.iii.1974; AD, A44944). Port MacDonnell, S. Aust., drift (Womersley, 19.viii.1953; AD, A18974). Gardens Beach, Portland, Vic., drift (Beaugiehole, 18.viii.1951; AD, A21593). Point Lonsdale, Vic., drift (Sinkora A1127, 8–12.xi.1970; AD, A62727). Walkerville, Vic., drift (Sinkora A2097, 27.0.1975; AD, A48301). Bombay Rock, Tamar Est., Tas., upper sublittoral (Womersley, 27.i.1949; AD, A10411). Stapleton Point, Prosser Bay, Tas., 4–10 m deep (Shepherd, 10.ii.1970; AD, A35720). Taroona, Tas., 5 m deep (Brown, 24.x.1982; AD, A55778). Taroona, Tas., 2–5 m deep, unattached (Westphalen, 31.i.1997; AD, A66903). Safety Cove, Port Arthur, Tas., shaded lower eulittoral pool (Womersley, 21.x.1994; AD, A64075-"Marine Algae of southern Australia" No. 420). Charlotte Cove, SE Tas., 3–6 m deep (Edgar, 6.x.1999; AD, A68341).

Distribution map based
on current data relating to
specimens held in the
State Herbarium of SA

Distribution: Houtman Abrolhos, W. Aust., to Walkerville, Vic., and around Tasmania; doubtfully Queensland (Lewis 1984, p. 55).

Taxonomic notes: Some deep-water and broad specimens from Investigator Strait appear similar to P. lobata in that they have midribs in lower fronds and in habit, but the pericentral cells are longer than usual and they are inadequately fertile. These specimens include AD, A38467 and A39331, from 27 m and 19 m deep, collected by Jan Watson on 10 and 11.i.1971.


AGARDH, J.G. (1863). Species Genera et Ordines Algarum. Vol. 2, Part 3, pp. 787–1291. (Gleerup: Lund.)

AGARDH, J.G. (1879). Florideernes morphologi. K. Svenska Vetensk. Akad. Handl. 15(6), 1–199, Plates 1–33.

DE TONI, G.B. (1903). Sylloge Algarum omnium hucusque Cognitarum. Vol. 4. Florideae. Sect. 3. pp. 775–1521 + 1523–1525. (Padua.)

FALKENBERG, P. (1901). Die Rhodomelaceen des Golfes von Neapel und der angrenzenden Meeres-abschnitte. Fauna und Flora des Golfes von Neapel. Monogr. 26. (Friedländer: Berlin.)

FUHRER, B., CHRISTIANSON, I.G., CLAYTON, M.N. & ALLENDER, B.M. (1981). Seaweeds of Australia. (Reed: Sydney.)

GUILER, E.R. (1952). The marine algae of Tasmania. Checklist with localities. Pap. Proc. R. Soc. Tasmania 86, 71–106.

HARVEY, W.H. (1847). Nereis Australis, pp. 1–69, Plates 1–25. (Reeve: London.)

HARVEY, W.H. (1855a). Some account of the marine botany of the colony of Western Australia. Trans. R. Jr. Acad. 22, 525–566.

HARVEY, W.H. (1858). Phycologia Australica. Vol. 1, Plates 1–60. (Reeve: London.)

HARVEY, W.H. (1859b). Algae. In Hooker, J.D., The Botany of the Antarctic Voyage. III. Flora Tasmaniae. Vol. II, pp. 282–343, Plates 185–196. (Reeve: London.)

HARVEY, W.H. (1863). Phycologia Australica. Vol. 5, Plates 241–300, synop., pp. i-lxxiii. (Reeve: London.)

HOOKER, J.D. & HARVEY, W.H. (1847). Algae Tasmanicae. Lond. J. Bot. 6, 397–417.

HUISMAN, J.M. (1997). Marine Benthic Algae of the Houtman Abrolhos Islands, Western Australia. In Wells, F.E. (Ed.) The Marine Flora and Fauna of the Houtman Abrolhos Islands, Western Australia, pp. 177–237. (W. Aust. Museum: Perth.)

KÜTZING, F.T. (1849). Species Algarum. (Leipzig.)

KÜTZING, F.T. (1866). Tabulae Phycologicae. Vol. 16. (Nordhausen.)

LEWIS, J.A. (1984). Checklist and bibliography of benthic marine macroalgae recorded from northern Australia. I. Rhodophyta. Dept. Defence, Materials Res. Lab., Melbourne, Vic. Report MRL-R-912.

LUCAS, A.H.S. & PERRIN, F. (1947). The Seaweeds of South Australia. Part 2. The Red Seaweeds. (Govt Printer: Adelaide.)

LUCAS, A.H.S. (1909). Revised list of the Fucoideae and Florideae of Australia. Proc. Linn. Soc. N.S.W. 34, 9–60.

LUCAS, A.H.S. (1915).—Report on the algae dredged by the F.I.S. Endeavour in Oyster Bay, Tasmania. In Zoological Results of the Fishing Experiments carried on by the F.I.S. Endeavour, 1909–1914. Vol. 3, pp. 55–57. (Aust. Minist. Trade and Customs: Melbourne.)

LUCAS, A.H.S. (1929a). The marine algae of Tasmania. Pap. Proc. R. Soc. Tasm. 1928, 6–27.

LUCAS, A.H.S. (1929b). A census of the marine algae of South Australia. Trans. R. Soc. S. Aust. 53, 45–53.

MAY, V. (1965). A census and key to the species of Rhodophyceae (red algae) recorded from Australia. Contr. N.S. W. Natl Herb. 3, 349–429.

PAPENFUSS, G.F. (1942). Notes on algal nomenclature: I. Pollexfenia, Jeannerettia and Mesotrema. Proc. Nat. Acad. Sci. 28, 446–451.

REINBOLD, T. (1898). Die Algen der Lacepede und Guichen Bay (Süd Australien) und deren näherer Umgebung, gesammelt von Dr. A. Engelhart-Kingston. II. Nuova Notarisia 9, 33–54.

SHEPHERD, S.A. & WOMERSLEY, H.B.S. (1981). The algal and seagrass ecology of Waterloo Bay, South Australia. Aquat. Bot. 11, 305–371.

SILVA, P.C., BASSON, P.W. & MOE, R.L. (1996). Catalogue of the Benthic Marine Algae of the Indian Ocean. (Univ. California Press: Berkeley.)

SONDER, O.W. (1853). Plantae Muellerianae. Algae. Linnaea 25, 657–709.

SONDER, O.W. (1880). In Mueller, F., Fragmenta Phytographiae Australiae. Supplementum ad volumen undecinum: Algae Australianae hactenus cognitae, pp. 1–42, 105–107. (Melbourne.)

TATE, R. (1882a). A list of the charas, mosses, liverworts, lichens, fungs, and algals of extratropical South Australia. Trans. R. Soc. S. Aust. 4, 5–24.

TISDALL, H.T. (1898). The algae of Victoria. Rep. 7th Meet. Aust. Ass. Adv. Sci., Sydney, 1898, pp. 493–516.

WILSON, J.B. (1892). Catalogue of algae collected at or near Port Phillip Heads and Western Port. Proc. R. Soc. Viet. 4, 157–190.

WOMERSLEY, H.B.S. (1950). The marine algae of Kangaroo Island. III. List of Species 1. Trans. R. Soc. S. Aust. 73, 137–197.

WOMERSLEY, H.B.S. (1966). Port Phillip survey, 1957–1963: Algae. Mem. natl. Mus., Vict. No. 27, 133–156.

The Marine Benthic Flora of Southern Australia Part IIID complete list of references.

Publication: Womersley, H.B.S. (24 February, 2003)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIID. Ceramiales – Delesseriaceae, Sarcomeniaceae, Rhodomelaceae
Reproduced with permission from The Marine Benthic Flora of Southern Australia Part IIID 2003, by H.B.S. Womersley. Australian Biological Resources Study, Canberra. Copyright Commonwealth of Australia.

Illustration in Womersley Part IIIA, 2003: FIG. 154.

Figure 154 image

Figure 154   enlarge

Fig. 154. Pollexfenia lobata (A, B, D, AD, A64075; C, E–G, AD, A68341). A. Habit. B. Growing margin of thallus. C. Thickened and split margin of older thallus. D. Transverse section of central thallus. E. Cystocarps on thallus surface. F. Spermatangial organs. G. Stichidia.

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