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Service Notice

The Western Australian Herbarium’s collections management system, WAHerb, and DBCA’s flora taxonomic names application, WACensus, have been set to read-only mode since 1 October 2025. Recent taxonomic changes are not currently being reflected in Florabase, herbarium collections, or the census. The Herbarium team, working with the Biodiversity Information Office, now have the Nomos-hosted WACensus in production, and we will begin to update the flora and fungi for WA within the system soon. The Specify project team continues to test and streamline the new collections management system, and we expect this to be online in October. Please reach out to us if you have any questions or concerns.

The notice period started at 9:45 am on Friday, 12 December 2025 +08:00 and will end at 12:00 pm on Thursday, 1 October 2026 +08:00.

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Crouania minutissima Yamada

Reference
Sci.Pap.Inst.Algol.Res.Fac.Sci.Hokkaido Imp.Univ. 3:40 (1944)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus with prostrate and erect axes, light pink, to 2 cm tall, ecorticate, occasionally slightly mucilaginous, attached by multicellular branched rhizoids from basal cells of whorl branches on prostrate axes. Erect axes bearing indeterminate branches alternately or unilaterally every 2–7 cells (more sparse lower down), these arising directly from axial cells in addition to whorl branches. Cells of erect axes 15–35 μm diam. distally [L:B 1.5–2], becoming broader and proportionally shorter proximally, to 150 μm diam. [L:B c. 1.4]. Whorl branches short, congested near the apex and curving upwards, otherwise mostly outwardly directed and not covering the axial filament, divaricately branched, the first division dichotomous, subsequent divisions dichotomous to trichotomous; terminal cells ellipsoidal or elongate, occasionally slightly attenuate.

Reproduction. Tetrasporangia arising 1–3 per whorl, singly on basal cells of whorl branches, spherical to subspherical, 35–50 μm diam., tetrahedrally divided. Other reproductive structures not observed.

Distribution. Widespread in warmer waters of the Indian and Pacific Oceans.

Habitat. Epiphytic on larger algae in the shallow subtidal.

[After J.M. Huisman in Algae of Australia: Marine Benthic Algae of North-western Australia, 2. Red Algae: 366 (2018)]