Bryopsis Plumosa !

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Bryopsis plumosa 50.670 (Hudson) C. Agardh filament MACRO PLANT Techniques needed and shape pinnate Classification Phylum: Chlorophyta; Order: Bryopsidales; Family: Bryopsidaceae *Descriptive name green plumes Features 1. plants bright green, 20 –250mm tall, branches spreading 2. many upright stalks (axes) arise from basal branching rhizoids 3. side branches and ultimate branches (ramuli) are thin, long and arranged in 2 rows in one flat surface (pinnately) Variations plants can be robust or delicate. Branching may be definitely pinnate only near branch tips ! Special requirements: 1. view the rarely-divided (coenocytic) filaments microscopically 2. measure the main stalks (axes): they should be about 0.3 – 1.0mm across 3. view the ramuli near the stalk tips to see the characteristic pinnate arrangement Occurrences from Rottnest I., W. Australia and S. Australia to Port Phillip, Victoria Usual Habitat on rock in intertidal pools or shallow water of sheltered localities Similar Species Description in the Benthic Flora Part I, pages 282-285 Details of Anatomy 2. 1. Preserved (bleached) and colourised specimens from Waterloo Bay, West ram ram coast S. Australia (A53137) 1. dense branching along the upper part of a main ax stalk (axis, ax). Side branches (s br) and ultimate branches s br (ramuli, ram) arise in 2 rows although this becomes difficult to see s br moving down the stalk 2. flat two-sided (pinnate) branching of ramuli at a branch tip * Descriptive names are inventions to aid identification, and are not commonly used “Algae Revealed” R N Baldock, S Australian State Herbarium, July 2005 3. Specimens of Bryopsis plumosa (Hudson) C. Agardh from S Australia 3. a pressed plant from Robe (A43931) showing ram the characteristic feathery (plumose) branching pattern 4. a preserved (bleached) and colourised plant (A53137) from Waterloo Bay viewed near a stalk (axis) base. Numerous long side 4. branches (s br) are visible, with ultimate branches (ramuli, ram) near their tips. The flat ax s br 2-sided (pinnate) branching can be difficult to see in the mass of threads * Descriptive names are inventions to aid identification, and are not commonly used “Algae Revealed” R N Baldock, S Australian State Herbarium, July 2005 .

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