Nuytsia 7(2): 209-219 (1990) 
209 
Acacia Miscellany 3. Some new microneurous taxa of Western Australia 
related to A. multilineata ( Leguminosae:Mimosoideae: Section Plurinerves) 
from Western Australia 
R.S. Cowan and B.R. Maslin 
Western Australian Herbarium, Department of Conservation and Land Management, 
P.O. Box 104, Como, Western Australia 6152 
Abstract 
Cowan, R.S. & B.R. Maslin. Acacia Miscellany — 3. Some new microneurous taxa of Western Australia related to 
A. multilineata (LeguminosaerMimosoideae: Section Plurinerves, from Western Australia. Nuytsia 7(2): 209-219 (1990). 
Five new species and one new variety are described (A. caesariala, A. mimica, A. mimica var. angusta, A. palagiala, 
A. torticarpa and A. unguicula) and A. multilineata W. Fitzg. is re-described. A key is included to enable users to distinguish 
the taxa. 
Introduction 
Acacia multilineata W. Fitzg. is a species of Western Australia with "microneurous" phyllode 
nervature (cf. Maslin & Pedley 1988 for definition). We use this term to refer informally to groups 
characterized by phyllodes with numerous, fine, closely parallel, longitudinal nerves, lacking 
anastomoses between them. Members of the 'Acacia multilineata group’ have persistent stipules 
and the main longitudinal nerves, as well as usually the lesser nerves, are clearly defined and raised, 
often strongly so. The closest relative of this group of species is A. lineolata and the taxa related to 
it; the ’A. lineolata alliance’ differs in having phyllode nervature that is less strongly raised, 
sometimes scarcely visible, and most of the taxa in the group have more or less linear phyllodes. 
Both groups are native to the south-western region of Western Australia. In the following key, 
A. ancistrophylla and A. lineolata arc included because of their close relationship to A. multilineata, 
but not described. 
This is the third in a series of papers by one or more of the PERTH Wattle Team. The series is 
designed to give full descriptions and/or notes concerning new or previously described taxa, to 
present new combinations, lcctotypifications, etc. in advance of their more abbreviated treatment in 
the Flora of Australia. Measurements arc from dried material unless otherwise stated. In the text, 
taxa that are described are arranged alphabetically. 
