Electronic Flora of South Australia Species Fact Sheet

Cystophora pectinata (Greville & C. Agardh ex Sonder) J. Agardh 1848: 244; 1896: 48.

Phylum Phaeophyta – Order Fucales – Family Cystoseiraceae

Selected citations: Womersley 1964: 81, fig. 21, pl. 7 fig. 1.


Cystoseira pectinata Greville & C. Agardh ex Sonder 1846: 160.

Thallus (Fig. 135B) medium to dark brown, 30–80(400) cm long, with a moderately robust primary axis and complanate branching. Holdfast discoid-conical, 1–2 (–3) cm across, with a single primary axis; epilithic. Primary axes terete to slightly compressed, usually ovoid in transverse section, 2–5 mm broad, with alternately distichous laterals and secondary axes from the slightly broader sides of the axes; secondary axes usually 5–20 cm long, not or slightly retroflex, tertiary axes when present usually short (2–4 cm); lower secondary axes often lost, with short, stubby, sometimes scalariform residues 2–8 mm apart. Laterals (Fig. 139A) 1–6 (–8) cm long, closely adjacent (1–3 mm apart) and alternately pinnate with simple, compressed ramuli and a narrow midrib with the upper part bearing a marginal wing continuous with the ramuli; ramuli 0.5–1 (–2) cm long, 0.5–1.5 mm broad, tapering at base and apex, simple or occasionally with 1–2 branches. Vesicles absent.

Reproduction: Thalli monoecious. Receptacles (Fig. 139A,B) simple, compressed, apiculate, 0.5–1 (–2) cm long and 1–2 (–3) mm broad, margins smooth to slightly torulose when fresh, torulose when dried. Conceptacles in two marginal rows with ostioles on the edges, bisexual, with simple paraphyses; oogonia sessile, ovoid, 100–150 µm long and 60–90 µm in diameter; antheridia on branched paraphyses, elongate-ovoid, 20–32 µm long and 10–14 µm in diameter.

Type from "Ad litus meridionale Novae Hollandiae"; in MEL, 607.

Selected specimens: Waterman Bay, Perth, W. Aust., drift (Williams, May 1929; UWA). Cowaramup, W. Aust., drift (Woelkerling, 16.xi.1968; ADU, A33124). Point Valliant, Two People Bay, W. Aust., drift ( Womersley, 30.viii.1979; ADU, A50960). Scott Bay (near Fowler Bay), S. Aust., drift (Womersley, 27.i.1951; ADU, A13898). Smooth I., Isles of St Francis, S. Aust., 21 m deep (Shepherd, 29.iii.1980; ADU, A52167). Elliston, S. Aust., 10–11 m deep in bay (Shepherd, 20.x.1969; ADU, A34991). Gulf St Vincent, S. Aust. (Dutton; MEL 605). Pennington Bay, Kangaroo I., S. Aust., drift (Womersley, 20.v.1945; ADU, A2373). Walkerville, Vic., drift (Sinkora A1581, 23.ii-9.iii.1972; ADU, A43099).

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

Distribution: From Waterman Bay, Perth, W. Aust. to Gulf St Vincent and Kangaroo I., S. Aust., and at Walkerville, Vic.

Taxonomic notes: C. pectinata is closely related to C. racemosa, differing in its terete to slightly compressed axes, smaller receptacles, and lack of vesicles. It is a deep water species, occasional in the drift from southern coasts of Western Australia to Kangaroo Island, South Australia.


AGARDH, J.G. (1848). Species, Genera et Ordines Algarum. Vol. 1. (Gleerup: Lund.)

AGARDH, J.G. (1896). Analecta Algologica. Cont. III. Ada Univ. lund. 32, 1–140, Plate 1.

SONDER, O.W. (1846). Algae. In Lehmann, C., Plantae Preissianae. Vol. 2, pp. 148–160. (Hamburg.)

WOMERSLEY, H.B.S. (1964). The morphology and taxonomy of Cystophora and related genera (Phaeophyta). Aust. J. Bot. 12, 53–110, Plates 1–16.

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

Author: H.B.S. Womersley

Publication: Womersley, H.B.S. (14 December, 1987)
The Marine Benthic Flora of Southern Australia
Part II
©Board of the Botanic Gardens and State Herbarium, Government of South Australia

Illustrations in Womersley Part II, 1997: FIGS 135B, 139A,B.

Figure 135 image

Figure 135   enlarge

Fig. 135. A. Cystophora xiphocarpa (ADU, A10212). B. Cystophora pectinata (ADU, A2372).

Figure 139 image

Figure 139   enlarge

Fig. 139. Receptacles of species of Cystophora. A,B. Cystophora pectinata (ADU, A13898). A. A pinnate lateral with ramuli. B. A receptacle. C,D. Cystophora racemosa (ADU, A26739). C. An axis with laterals. D. Lower part of a lateral with receptacles and a vesicle. E,F. Cystophora botryocystis (ADU, A26864). E. An axis, and laterals with crowded ramuli and basally clustered vesicles. F. Receptacles. G,H. Cystophora polycystidea (ADU, A26755). G. Two secondary axes with laterals. H. Receptacles on a lateral.

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