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Electronic Flora of South Australia Species Fact Sheet

Cystophora grevillei (C. Agardh ex Sonder) J. Agardh 1848: 245; 1896: 48.

Phylum Phaeophyta – Order Fucales – Family Cystoseiraceae

Selected citations: Harvey 1862: pl. 183. Womersley 1964: 83, figs 26,27, pl. 8 fig. 2.


Cystoseira grevillei C. Agardh ex Sonder 1846: 160.

Thallus (Fig. 134B) medium to dark brown, moderately robust but loosely branched in the one plane, 0.5–1.5 m long with spreading secondary axes and laterals. Holdfast discoid-conical, 0.5–2.5 cm across, with a single primary axis; epilithic. Primary axes more or less terete, 2–5 (–7) mm in diameter, alternately distichously branched, usually denuded below with short branch residues; secondary axes normally present and often becoming as long as the primary axis, 0.5–2 (–4) cm apart, not or slightly retroflex, of similar thickness to the primary axes; tertiary axes often present. Laterals (Fig. 136E) 4–10 cm long, alternately distichous with 3–8 (–12) simple ramuli per lateral, axils rounded, ramuli 2–8(40) cm long and 1–2 mm in diameter, subterete. Vesicles usually present, replacing the basal 1 (–2) ramuli of laterals, stalked, spherical to slightly ovoid, 5–10 (–12) mm in diameter, mutic.

Reproduction: Thalli monoecious. Receptacles (Fig. 136E,F) bisexual, simple, 2–8 (–15) cm long, 1–2 (–3) mm broad, subterete but drying slightly compressed, linear to slightly torulose, smooth. Conceptacles usually unisexual, more or less adjacent, with ostioles in 2 (–3) rows; oogonia sessile, ovoid, 80–105 µm long and 50–65 p.m in diameter, with simple paraphyses; antheridia on branched paraphyses, ovoid to elongate-ovoid, 12–20 µm long and 8–12 in diameter.

Type from W. Aust. (probably near Fremantle) (Preiss); in MEL, 286.

Selected specimens: 7 mile beach, N. of Dongara, W. Aust., drift (Womersley, 17.ix.1979; ADU, A51345). North Beach, Perth, W. Aust., drift (Levring, 23.vii.1948; ADU, A56078). 16 km E. of Eucla, S. Aust., drift (Womersley, 3.ii.1954; ADU, A19252). Ward I., S. Aust., 18–23 m deep (Shepherd, 3.iii.1980; ADU, A50896). Investigator Str., S. Aust., 26 m deep, 35°19'S, 137°17'E (Watson, 28.i.1971; ADU, A38522). Saunders Beach, Eastern Cove, Kangaroo I., S. Aust., drift ( Womersley, 25.viii.1963; ADU, A26752). Rocky Point, Eastern Cove, Kangaroo I., S. Aust., drift (Womersley, 4.vi.1947; ADU, A5713). Robe, S. Aust., drift (Nizamuddin, 16.iv.1959; ADU, A24071). Bridgewater Bay, Vic., drift (Beauglehole, 24.vii.1949; ADU, Al2097). Wilsons Prom., Vic. (Mueller; Lucas Herb., NSW). Low Head, Tas. (Perrin, 3.ix.1972; BM). Swansea, Tas., drift (Womersley, 19.i.1949; ADU, A10227).

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

Distribution: From 7 mile beach, Dongara, W. Aust., around southern Australia to Wilsons Promontory, Vic., and around Tasmania.

Taxonomic notes: C. grevillei is characterised by the terete axes and open, complanate branching; it seems to be a deep water species, known largely from the drift.


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.

HARVEY, W.H. (1862). Phycologia Australica. Vol. 4, Plates 181–240. (Reeve: London.)

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 134B, 136E,F.

Figure 134 image

Figure 134   enlarge

Fig. 134. A. Cvstophora intermedia (ADU, A57283). B. Cystophora grevillei (ADU, A19252).

Figure 136 image

Figure 136   enlarge

Fig. 136. Receptacles of species of Cystophora. A. Cystophora platylobium (ADU, A26865). B. Cystophora moniliformis (ADU, A18823). C. Cystophora intermedia (ADU, A26800). D. Cystophora intermedia (ADU, A3462). E. Cystophora grevillei (ADU, A26752), axis with laterals and vesicles. F. Cystophora grevillei (ADU, A5713), receptacles. G. Cystophora xiphocarpa (ADU, A19808), axis with simple laterals.

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