LICHENS AND LICHEN. PARASITES

192 I B.A.N.Z. ANTARCTIC RESEARCH EXPEDITION
Our species evidently belongs in the group with P. Gerlachsi from the strncture of its lower
cortex, but differs in its reaction with KOH.
Growing over sand and mosses between roclrs, with Heppia antarctica and Xanthoria Mawsoni.
Queen Mary Land : Hippo Nunatak, C. T. Harrisson, A.A.E. 59.
MacRobertson Land : Cape Bruce, 67" 26' S., 60" 49' E., B.A.N.Z.A.R.E. B108-3, B108-16
type, B108-17, B108-18, B108-19, B108-20, B108-21, B108-22.
Section PHYSCIOIDEAE Dodge & Baker.
Pamelia subgenus Euparmelia sect. Physcioideae Dodge & Baker, Ann. Mo. Bot. Gard., 25, 590;
1938.
Type : P. variolosa Dodge & Baker.
Cortex appearing pseudoparenchymatous above and often extending a short distance over the
underside ; lower cortex of compact, slender, periclinal hyphae, or decomposed ; apothecia sessile.
Our material of this section is fragmentary and the determinations are somewhat doubtful.
PARMELIA LEUCOBLEPHARA Dodge & Baker.
Parmelia leucoblephara Dodge & Baker, Ann. Mo. Bot. Gard., 25, 592; 1938.
Type : Marie Byrd Land, Edsel Ford Range, Lichen Peak, P. Siple & S. Corey 73-7.
Thallus up to 8 mm. in diameter, laciniae irregularly branched, divaricate, flat or somewhat
convex, white, smooth, margins smooth, with long branched cilia, white then fuscous; soredia
granulose and subisidiose with somewhat elevated margins; K yellow ; rhizinae long, fuscous and
unbranched; upper cin-tex 1 5 thick, ~ fastigiate, cells ellipsoid, brown, 7-14 X 5.5-7r, covered by
a gelified layer 7-lip thick; algal layer 20-3OP thick, cells protococcoid, 5-7r in diameter, single or
in small colonies ; medulla 55-6OP thick, of slender hyphae, 1 -5-2r. in diameter, very loosely woven ;
lower cortex 3OP thick, of brownish hyphae 1.5-2p, loosely woven with an outer layer of subspherical
brown cells 5.5-6r. in diameter; rhizinae 40-60~ in diameter, of longitudinal hyphae
with an outer brown layer.
Spermogonia immersed, subspherical, 55 X 7OP, wall 7-9r thiclr, of isodiametric thick-walled
cells ; spermatiophores long, slender ; spermatia bacilliform, strraight.
A few young plants were seen growing on rocks with P. Johnstoni which seem to belong here,
but are still too young to produce soredia; also some very old plants on bits of rock, tangled with
Polycadiona. show the name structure. Specimens from Queen Mary Land were growing over
dead moss, associated with Buellia muscicola and Xanthoria Mawsoni.
Queen Mary Land : Possession Nunatak, C. T. Harrison, A.A.E. 61-1, 61-2.
MacRobertson Land : Cape Bruce, B.A.N.Z.A.R.E. B108-23, B108-27.
PARMELIA VARIOLUSA Dodge & Baker.
Pa.rme!ia variolosa Dodge & Balrer, Ann. Mo. Bot. Gard., 25, 593 ; 1938.
Type: Marie Byrd Land, Edsel Ford Range, Mt. Rea-Cooper, P. Siple, F. A. Wade, S. Corey
and 0. D. Stancliff R-1.
Thallus up to 2 em. in diameter, laciniae convex, 0.6-0.8 mm. broad, dichotomously branched,
tips truncate, smooth, pruinose, primuline yellow, rarely greying; soralia large, granular, K
yellow; upper cortex 5-2OP thick, rather loosely pseudoparenchymatous, covered by a gelified
layer 5-15r. thick, thicker where the cortex is thin and vice versa; algae 7-gP in diameter, pro-
tococcoid, scattered in the upper portion of the medulla which is 500-60OP thiclr, of loosely woven