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
Pyxine cocoes (Sw.) Nyl.

Mém. Soc. Sci. Cherbourg 5: 108 (1857)

Lichen cocoes Sw., Nov. Gen. Sp. Pl. 146 (1788); Coccocarpia pellita var. cocoes (Sw.) Zahlbr., Cat. Lich. Univ. 3: 286 (1925).

T: Jamaica, on Cocos, Swartz; holo: S n.v.; iso: H-ACH 379 n.v.

  Thallus 3–10 cm wide, adnate, dichotomously lobate. Lobes radiating, discrete to ±contiguous, plane to slightly convex or concave, 0.4–0.8 mm wide, subrotund to truncate at the apices. Upper surface white to yellowish white, pale yellow-brown or grey, patchily pruinose; pruina glistening; dactyls and isidia absent. Pseudocyphellae usually retricted to the margins, rarely laminal or becoming reticulately confluent, often developing into soralia. Soralia marginal and laminal, orbicular to linear, ±coalescing into extensive patches; soredia granular. Medulla uniformly white. Lower surface black in the centre, paler towards the periphery; rhizines ±dense, furcate. Apothecia rare, cocoes-type, 0.4–1.4 mm wide; disc epruinose. Internal stipe distinct, reddish brown in the upper part and K+ purple, P–; lower part white, K–, P–. Ascospores 15–18 × 6–7 μm. Conidia bacilliform, 3–4 × c. 1 μm.
CHEMISTRY: Cortex K–, UV+ yellow; medulla K–, C–, KC–, P–; containing lichexanthone (major), ±unknown terpenes (traces).
  This mainly pantropical lichen grows on rock, wood and bark in coastal and hinterland forests in northern W.A., N.T. and Qld. Also on Lord Howe Island, Norfolk Island, Christmas Island, Africa, Asia, North, Central and South America and on many Pacific islands.  
  Elix (2009l)  

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