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DODGE--<strong><strong>LICHEN</strong>S</strong> <strong>AND</strong> <strong>LICHEN</strong> <strong>PARASITES</strong> 97 1<br />
On rocks with l'helidium praevalescens, Steinera Werthii, Lecidea rhizocarpiza, Rhizocar-<br />
pon kerguelense ancl Aspicilia disjungqienda.<br />
liergnelen : Mt. Wrville Thompson, 1,000-1,500 ft. B.A.N.Z.A.R.E. B246-29 ; Greenland Har-<br />
bonr, B.A.N.Z.A.R.E. R277-9, R177-24 ; 'noyal Sonnd, B.A.N.Z.A.R.E. I390-9.<br />
ANTARCTIC SPECIES OF LECIDEA (EULECIDEA)<br />
While two species of the subgenus Psora and five of the subgenus Biatora have been reported<br />
from the Antarctic Archipelago and neighhouring Graham Land, only members of Elilecidea have<br />
been founcl in Marie Ryrd Land, Sbuth Victoria Laiid aiid in onr area. In the following key<br />
only E~rlecidea species are given.<br />
Thall~ls deep greyish, brown or fuscous<br />
Spores less than lop; hypothecium hyaline; thallus fusco-rnf~us . L. brqinneoatra<br />
Spores more than lop long<br />
Apothecia 1 mm. or more in diameter<br />
Thallns thick, hypothecium black . . . . . . . . L. atrobrunnea<br />
Thallus thin, poorly developed . . , . . . . . L. fuscoatra<br />
Apothecia less than 1 mm.; thallus 0.4-0-5 mm.<br />
Thallns deep greyish . . . . . . . . . . L. cinericia<br />
Thallus brownish . . . . . . . . . . L. rufonige~rima<br />
Thallus clark olive buff or darker; hypothecium 201* thick; thecium 25-3OP tall L. Laseroni<br />
Thallus citrine drab to pale olive buff; hypothecium GO-701* thick; thecium 50-9OP tall<br />
L. Blackburni<br />
Thallus white to pale yellowish, sometimes stained ferruginous when growing over ferriferous rock9<br />
Apothecia over 2 mm. in diameter . . . . . . . . L. attriculata<br />
Apothecium up to 1.5 mm. in diameter; pa rathecium rery thick below, usually with strands<br />
penetrating into the medulla . . . . . . . . . . L, cancriforwis<br />
Apothecia 1 mm. or less in diameter<br />
Hypothecium dark fuscous to brown<br />
Spores 10-16 X 5-8/*; hypothecium 100-150H thick<br />
Cortex not differentiated; apotliecia about 0.3 mm. in diameter; thecium GOlr<br />
tall; paraphyses 0.5-1.5r in diameter, tips 2p . . L. ecmticata<br />
Cortex 30-6OP thick ; apothecia 0-6-1 -0 mm.<br />
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Thecium 100-12OP tall; paraphyses 5-Gp, tips not thickened<br />
L. cremmicolor<br />
Thecium 140-16OP tall; paraphyses 3p, tips furcate L. sciatrapha<br />
Spores 7.5-lo1* long ; epithecium K green<br />
Spores 2-+ in diameter; thecium 304OP tall; asci short clavate, base not<br />
attenuate, 24-28 (-32) X 12-5-14p . . . . . . . L. Coreyi<br />
Spores in diameter; thecium 50p tall ; asci clavate to subcylindric, becomiiig<br />
broadly ellipsoid with a long base, 25 X 8-9p . . L. MacLeani<br />
Spores 5-G1* in diameter ; thecium 60/* tall ; asci clavate . . L. mtpicidn<br />
Spores G-8.5p long ; epithecium K green<br />
Spores 1.7-2 -5p in diameter<br />
~sci 25421* tall, inflated above, attenuate below; hypothecium 10OP thick<br />
with long strands penetrating the medulla . . L. cancriforn&is<br />
Asci (37-) 52-6OP tall, not inflated; hypothecium 60-70cr thick, not pene-<br />
trating the medulla . . . . . . . . 1,. Rlackh~trni
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