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Codium harveyi Silva in Silva & Womersley 1956: 277, fig. 11, pl. 2 fig. 1.

Phylum Chlorophyta – Order Codiales – Family Codiaceae

Thallus (Fig. 79A) medium green, erect, repeatedly dichotomous, to 30 cm high, branches terete, 3–5 mm in diameter below, tapering to 1–2 mm in diameter at apices. Utricles (Fig. 80A) short and irregularly swollen, 170–600 in diameter, 340–850 µm long, apices broadly rounded with wall scarcely to slightly thickened to 24 (–50) µm; hairs (or scars) frequent. Medullary filaments 30–60 µm in diameter, with the plug usually closely adjacent to utricle, in some plants more distant on older utricles. Gametangia elongate-ovoid, often tapering above, 70–140 µm in diameter and 150–240 µm long, 1–4 per utricle, borne on a short protuberance on lower half of utricle.

Type from Vivonne Bay, Kangaroo I.. S. Aust. (Womersley, 2.i.1949); in ADU, A10557.

Selected specimens: South Passage, Shark Bay, W. Aust., 5 m deep (Cambridge, 16.viii.1979; ADU, A51759). Seal Bay, Kangaroo I., S. Aust., drift (Gordon, 31.x.1966; ADU, A30964). Robe, S. Aust., drift (Womersley, 7.ii.1970; ADU, A35175-"Marine Algae of southern Australia" No. 20). Walkerville, Vic., drift (Sinkora A2288, 6.iii.1976; ADU, A48462). East Cove, Deal I., Bass Str., 15 m deep (Shepherd & Lewis, 5.v.1974; ADU, A45252). Low Head, Tas. (Perrin, Sept. 1950; in UC). Tamar R. mouth, Tas., (Mackay; in K).

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

Distribution: From Shark Bay, W. Aust. around southern Australia and Tasmania to Lake Macquarie, N.S.W.

New Zealand.

Taxonomic notes: C. harveyi occurs in the sublittoral, from low tide level to 30 metres deep, on coasts of moderate water movement. It is distinguished by its short, squat utricles with the medullary filament plug adjacent to the utricle.


SILVA, P.C. & WOMERSLEY, H.B.S. (1956). The genus Codium (Chlorophyta) in southern Australia. Aust. J. Bot. 4, 261–289.

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

Author: H.B.S. Womersley

Publication: Womersley, H.B.S. (31 May, 1984)
The Marine Benthic Flora of Southern Australia
Part I
©Board of the Botanic Gardens and State Herbarium, Government of South Australia

Illustrations in Womersley Part I, 1984: FIGS 79A, 80A.

Figure 79 image

Figure 79   enlarge

Fig. 79. A. Codium harveyi (ADU, A10557, type). B. Codium muelleri (ADU, A35176). C. Codium australicum (ADU, A38221). D. Codium fragile (ADU, A34854). E. Codium spinescens (ADU, A19240. type).

Figure 80 image

Figure 80   enlarge

Fig. 80. Utricle clusters with gametangia. A. Codium harveyi (Perrin in UC and Mackay in K (right)). B. Codium muelleri (ADU. A18661). C. Codium australicum (Cribb 150.1 in UC). D. Codium fragile s.sp. tasmanicum (Cribb 126.9 in UC). E. Codium fragile s.sp. novae-zelandiae (ADU, A31711). F. Codium spinescens (Royce 616 in PERTH). (After Silva & Womersley 1956.)

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