You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
DODGS<strong><strong>LICHEN</strong>S</strong> <strong>AND</strong> <strong>LICHEN</strong> <strong>PARASITES</strong><br />
Psoronta lanuginosum Wilson, MBm. Herb. Boissier 1887 ; 1900 non aliorum.<br />
Four specimens under this name in the National Herbarium at Melbourne Botanic Garden<br />
are not this species as represented in Europe and understood by Acharius or Miiller-Argau. They<br />
seem to be young thalli growing over mosses and may be a juvenile condition of the primary<br />
thallus of Cladonfa phy!lophora (Tayl.) Dodge. Cortex not developed, masses of very slender,<br />
closely woven hyphae, enclosing colonies of cystococcoid algae, cells 4-6,~ in diameter. The thalli<br />
are granular in confluent patches up to 1.2 em. in diameter, chalky white. Another thallus more<br />
cottony in appearance is 'a hgphomycete (perhaps Sporotrichunt) completely lacking algae.<br />
Kerguelen : Royal Sound, Robert Hall (Nat. verb. Melbourne Bot. Gard.)<br />
- /-- - ,<br />
<strong>LICHEN</strong> <strong>PARASITES</strong>.<br />
Besides the species described below, mycelium and sometimes immature or very old perithecia<br />
suggestive of Endococcu.s have been seen in various collections, all in too poor condition for descrip-<br />
tion.<br />
PERISPORIACEAE,<br />
ORBICULA Cooke.<br />
Orbicula Cooke, Handbook Brit. Fungi, 2, 926; 1871.<br />
Type : Originally based on 0. cyclospora Cooke and 0. tartaricola (Nyl.) Cooke. Saccardo,<br />
Syll. Fung., 1, 36; 38. 1882 transferred 0. cyclospora to Ano'zia, leaving 0. tartaricola as the type.<br />
Perithecia between membranaceous and carbonaceous, reticulated, seated on a distinct super-<br />
ficial mycelium; ostiole absent; asci cylindric; ascopores subspherical, hyaline at first, finally<br />
brown ; paraphyses simple or branched.<br />
ORBICULA BUELLIAE Dodge, sp. nov.<br />
I Type : Queen Mary Land, Possession Nunatak, C. T. Harrisson, A.A.E. 12.<br />
/ Hyphae ramosae pachydermeae brunneae septatae, 4-5r diametro, superficiales vel in parte<br />
I<br />
a ' speriore thalli hospitis penetrantes. Perithecia sphaerica, ca. 50,~ diametro, nigra ; murus 8-lop<br />
crassitudine, stratis duobus cellularum polygonalium 8-lor diametro, 4-5,~ crassitudine ; paraphyses<br />
tenues, ca. 1-5p diametro, hyalinae, evanescentes; asci cylindrico-clavati, mox evanescentes;<br />
ascoporae subsphaericae, hyaline, dein brunneae, ca. 6 X 4,~.<br />
Mycelium of thick-walled, brown, septate, branched hyphae 4-5p in diameter, mostly superficial<br />
but penetrating the upper portion of the thallus of the host. Perithecia spherical, up to 50p<br />
in diameter, black; wall of two layers of thick-walled, dark brown, polygonal cells (giving a reticulate<br />
appearance to the surface of the perithecium), 8-lop in diameter and 4-5p thick; paraphyses<br />
slender, about 1.5,~ in diameter, hyaline, soon evanescent ; asci cylindric-clavate, soon evanescent ;<br />
ascospores subspherical or short ellipsoidal, hyaline becoming brownish, about 6 X 4p.<br />
On Buellia mz~scicola Dodge & Baker.<br />
The richly branched, brown mycelium appears to cut off 2-celled, thick-walled, brown conidia,<br />
about 11 X 6p from short, erect, simple conidiophores. iEach perithecium appears to arise from a<br />
single hypha.<br />
Queen Mary Land: Possession Nunatak, c.'T. Harrisson, A.A.E. 12.
Change language