Department of the Environment and Water Resources home page

About us | Contact us | Publications | What's new

Header imagesHeader imagesHeader images

Australian Biological Resources Study

Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Usnea elata Motyka
  Usnea 1: 57 (1936). T: M'Palas ad litus occidentalis lacus Tanganjika, [M'Palas, western beach, L. Tanganyika, Zaïre], 1898, Guillemé s.n.; holo: TUR-V 00326.  
  Thallus erect to subpendulous, to 15 cm long, grey-green to yellowish grey; branching subdichotomous to irregular; trunk pale to black; branches terete; fibrils to 5 mm long on main branches; branchlets and papillae absent. Isidia sparse, solitary, rarely clustered, eroding to punctiform pseudocyphellae; soralia absent. Cortex cracked. Medulla dense, with a yellow to pink layer surrounding axis; axis 3/4 width of branch, hollow. Apothecia not seen. CHEMISTRY: Cortex containing usnic acid. Medulla K–; containing diffractaic acid (major), 2-O-methylobtusatic acid (trace), baeomycesic acid (trace), 4-O-demethylbarbatic acid (trace) and 3-α-hydroxybarbatic acid (trace).
  Very rare on Allocasuarina torulosa in eastern Qld; also in Central Africa.  
  Stevens (2004)  

Checklist Index
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References

This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission from Australian Biological Resources Study. Requests and inquiries concerning reproduction and rights should be addressed in the first instance to Dr P. McCarthy. These pages may not be displayed on, or downloaded to, any other server without the express permission of ABRS.

Top | About us | Advanced search | Contact us | Information services | Publications | Site index | What's new