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Electronic Flora of South Australia Species Fact Sheet

Botryoglossum cartilagineum (Harvey & Greville) Papenfuss 1942: 447.

Phylum Rhodophyta – Family Delesseriaceae

Selected citations: May 1965: 401. Silva et al. 1996: 448. Wagner 1954: 325.


Pollexfenia cartilaginea Harvey & Greville in Harvey 1847: 23. J. Agardh 1892: 165. De Toni 1903: 981.

Rhodoseris cartilaginea (Harvey & Greville) Harvey 1863, synop.: xvii. J. Agardh 1876: 476; 1898: 115; 1899: pl. 3 fig. 6. De Toni 1900: 622. Kylin 1924: 97; 1956: 448. Lucas 1909: 35. Schmitz & Hauptfleisch 1897: 411. Sonder 1880: 24.

Thallus (Fig. 68A) medium to dark red-brown, 8–15 cm high, complanately and irregularly branched usually 5–20 mm apart, with elongate branches increasing in width upwards from 2–5 mm broad basally to 6–15 mm broad near the rounded apices, margins entire, smooth. Midrib inconspicuous above, thickened near the base and 2–3 mm broad; microscopic veins absent. Holdfast fibrous, 2–8 mm across; epilithic. Structure. Growth marginal, without conspicuous apical cells, with smaller cells marginally increasing to irregularly arranged angular cells 10–25 (–30) µm across and L/D 1–1.5 (–2). Blades soon tristromatic, later polystromatic (3–7 cells) and 35–55 µm thick, with corticating cells tiered (Fig. 68B) and equivalent in size to central layer which is not distinctive; midrib areas many cells thick.

Reproduction: Gametophytes unknown.

Tetrasporangial sori on ovate marginal leaflets (Fig. 68C) 1–3 mm across, several cells (Fig. 68B, D) and 300–400 thick, with short terete stipes, arising on the blade surface; tetrasporangia occupying most of the leaflet, of varying ages, cut off from cortical cells, subspherical and 45–75 µm in diameter.

Type from "Swan R. colony", W. Aust. (Mylne); holotype in Herb. Harvey, TCD.

Selected specimens: Dongara, W. Aust., drift (Kraft 1797, 7.vii.1966; AD, A50326). Twin Rocks, Head of Great Australian Bight, S. Aust., 20–22 m deep (Branden, 19.i.1991; AD, A61145).

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

Distribution: Dongara to the Swan R. region, W. Aust., and Head of the Great Australian Bight, S. Australia.

Taxonomic notes: B. cartilagineum is apparently

The Twin Rocks collection is the only one from southern Australia.


AGARDH, J.G. (1876). Species Genera et Ordines Algarum. Vol. 3, Part 1 - Epicrisis systematis Floridearum, pp. i-vii, 1–724. (Weigel: Leipzig.)

AGARDH, J.G. (1892). Analecta Algologica. Acta Univ. lund. 28, 1–182, Plates 1–3.

AGARDH, J.G. (1898). Species Genera et Ordines Algarum. Vol. 3, Part 3 - De dispositione Delesseriearum. (Gleerup: Lund.)

AGARDH, J.G. (1899). Analecta Algologica. Cont. V. Acta Univ. lund. 35, 1–160, Plates 1–3.

DE TONI, G.B. (1900). Sylloge Algarum omnium hucusque Cognitarum. Vol. 4. Florideae. Sect. 2. pp. 387–776. (Padua.)

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

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

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

KYLIN, H. (1924). Studien über die Delesseriaceen. Lunds Univ. Årsskr. N.F. Avd. 2, 20(6), 1–111.

KYLIN, H. (1956). Die Gattungen der Rhodophyceen. (Gleerups: Lund.)

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

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.

SCHMITZ, F. & HAUPTFLEISCH, P. (1897). Delesseriaceae. In Engler, A. & Prantl K., Die natürlichen Pflanzenfamilien. T. 1. Abt. 2. Pp. 406–416.

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

WAGNER, F.S. (1954). Contributions to the morphology of the Delesseriaceae. Univ. Calif Pubis Bot. 27, 279–346.

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

Author: H. B. S. Womersley

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. 68.

Figure 68 image

Figure 68   enlarge

Fig. 68. Botryoglossum cartilagineum (A, AD, A61145; B–D, AD, A50326). A. Habit. B. Transverse section of a branch and tetrasporangial bladelet. C. A tetrasporangial bladelet. D. Section of a tetra-sporangial bladelet.

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