LICHENS AND LICHEN. PARASITES

DODGE-LICHENS AND LICHEN PARASITES 23 1
incrusted with minute yello\vish crystals in tlie upper 10-12p; algae protococcoicl, cells 7-10u in
diameter, occurring in more or less velatical rows between the vertical medullary hypliae which
unite into a palisade above the algae aiid illclose roclr crystals below them.
Apothecia immersed in the thall~is at first, becoming slightly elevated and co~lstricted at the
base at maturity, about 0-2 mm. in diameter, margin greenish yellow to oil yellow, smooth, ilot
elevated, disc plane, old gold to buffy citrine; amphithecium 75p thick, cortex snbfastigiate, of
thick-walled, conglutinate hyphae about 6p in cliaiiieter ; parathecium about 20p thiclr, of thinwalled,
pe~*iclinal, hyaline hyphae, 3p in diameter ; hypothecium about 20p thiclr, soine~vhat psendoparenchymatous,
deeply staining; thecium. 75p tall. ; paraphyses slender, tips not enlarged, somewhat
moniliform, iinbeddecl i11 the epithecial gel, with n!inute crystals; asci about 60 X 15p, subcylindric
at first, tip somewhat thickened, protoplast acute, becoming greatly inflated above to
broadly clarate, 8-spored ; ascospores 14-15 X 8-9p, broadly ellipsoidal, protoplasts more or less
hemispherical, joined by an isthmus when yonng, separate at maturity.
As I have not seen the type, the above description is based on onr material which agrees well
114th the original descriptioii except fnlly niatnre spores are somewhat larger.
Three other collections from the sanle loca1it.y have smaller and narrower spores with soniewhat
larger apothecia. They may belong here or i11 P. subpyracea or they may be new. Siiice so
many of the species from Australia and N ~ W Zealand are so briefly described aiid the types
scattered in European herbaria at present i.liaccessible, I prefer to await a n~onographic treat~iient
of the Blasteiiiaceae from this regioii rat!ier t!iall adding to the confusion by .describiiig additional
species.
Gro~ving over roclr and Riflodincl. q ~p. with Lecania John.ston.i, Gusparriniu ~n~ucquu.vie?zsis,
~inoditjn: peloleucu. aid R. s~t.bbadiontra.
Macquarie Island, Featherbed Flat, R.A.N.Z.A.R.E. B533-2, B533-3, B5334, B533-6,
B533-7.
PYRENODESMIA SUHPYRA(!EA (Nyl.) Dodge, comb. nov.
Lecanorcc suhpyruc.n Kyl., Ilich. Nov. Zelaiid., 59 ; 1888.
Caloplaca subpjmceo Zahlbr., Cat. Licli. TTniv., 7, 185; 1931.
Type : New Zealand, Knight, IIelms, corticole.
Thallus thin, rimose areolate, priinnline yell ow, iilargill very thin and lighter coloured over the
rock, thicker with a narrow, bluish-black liiic above the thallus of Buellia Mawsoni, snrface somewhat
rngose; ecorticate; algae protococcoid, in discrete colonies betweell strands of more or less
vertical, slender, medullary hyphae 1vhic11 becollie inore irregnlar below and inclose many rock
crystals.
Apothecia sessile, coilstricted at the baae, margin old gold, darkening to Saccardo's olive,
thick and elevated at first, becoming thin and level with the disc, which is buclrthorii brown darkeningdo
mummy brown and almost black; ampliithecium with fastigiate cortex 35-40p thiclr, the
outer portioil son~e~vhat gelified with miiinte crystals; algal layer up to 100p thiclr at the margin,
cells loosely arranged below, more coinpact nnder the parathecium and separatcd into discrete
colonies separated by strands of medullary hyphae toward the centre; parathecium 150p thick at
the centre, thinning to 50p at the margin of the tliecinm, hyphae thin-walled, hyaline, pericliaal
below, spreading fan-\vise at the margin as they curve upward i11 a wall abouMhe theciuni ; hypotheci~un
about 50p thiclr, deeply stt~ining, of more or less vertical hyphae, not sharply differentiated
from the thecinni above; theci~uii about 'isp tall; paraphyaes several times dichotomons above,
branches moniliform but not conspicnously thiclrened, covered by a layer 7-8p thiclr of clear