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DODGE-<strong><strong>LICHEN</strong>S</strong> <strong>AND</strong> <strong>LICHEN</strong> <strong>PARASITES</strong><br />
SII'HULASTRUM CLADINOIDES Dodge, Sp. IlOV.<br />
Type: Macclual.ic Islancl, Featherbed Flat, Sta. 81a, B.A.N.Z.A.R.E. 13531-2.<br />
Thallus flaccidus, gelifactus semipellucidus ad 1-5 cm. altitudine, basi emoriens, apice<br />
pro]iferens, 0-4-0.5 mm. diametro, teres, plus minnsve dichotome ramosus, snperne ramis den-<br />
yic,l*ibus subapplaiiatisque, apicibus eis Cladinue similibu5 (unde nomen), alntacens; hyphae<br />
c.ortieaiites tenuissimae, 1.5-2p diametro, longitndinales ralllis anastomosantibus, superioribus<br />
ctlrvatis perpendicularibus, cellulas ellipsoideas 6-7 X 2-3p i11 sterigmatibus brevibus abjun-<br />
geiltrs; cellulae algarum in coloiliis sparsis inter hyphas corticantes et medullam, sphaericae 8-9/*<br />
diamctro, tenui-vaginatae vel angulares, dein in catenis brevibus ; nledulla hyphis longitudiiialibus<br />
:tl* diametro rare rainosis anastomosantibusque.<br />
Thallus flaccid, gelatinous, up to 1.5 cm. tall, dying at the base, aiid proliferatiiig at the<br />
apes, 0.4-0.5 mm. in diameter below, terete or nearly so, more or less dichotomously branched;<br />
iibovc branching denser, more irregular and branches somewhat flattened, tips suggestive of those<br />
of Cladim (whence the name), cream-buff to ca rtridge-buff, semipellucid ; whole thallus gelified ;<br />
cortical hyphae very slender, 1.5-2p in diameter, longitudinal branching at nearly right angles<br />
and anastomosing, sending perpendicular branches up through the gel, upper portion curved and<br />
cutting off small long-ellipsoidal cells G-7 X 2-3p on slender, short sterigmata; algal cells in<br />
scattered colonies between the corticating hyphae and the medulla, cells mostly spherical 8-9p in<br />
diameter with relatively thin sheaths, each penetrated by a haustorium, protoplast ecru olive to<br />
olive-ochre, sometimes angular and then in short chains, probably Scytonema; medulla of thick-<br />
walled longitudinal hyphae 3p in diameter spaced 6-8p apart, rarely branched and anastomosing.,<br />
A thorough search of all the available material with a high-power dissecting microscope ha5<br />
failed to locate reproductive organs beyond the conidium-like cells borne on the cortical hyphae.<br />
Occasionally I have seen spherical spermogonioid structures 18p in diameter, with a wall one cell<br />
thick, a palisade of sporophores about 6 X 2p, cutting off short, bacilliform cells about 2 X 1p<br />
which may be spermatia or may be a parasite. Compare the spermogonia and spermatia of Lichina<br />
pygnmea described and figured by Tulasne (Anp. Sci. Nat. Bot. III., 17, 211-212; pl. 9, fig. 2,<br />
3, 6; 1852: and L. confinis, loc. cit. pl. 10, figs. 12-15) but our structures are apparently much<br />
smaller. Brownish spots on the thallus are frequently due to a species of TorzJa.<br />
Growing in tufts of Polytrichum.?<br />
Macquaric Island, Featherbed Flat, Sta. 81a, B.A.N.Z.A.R.E. B531-2.<br />
SIPIXULASTRUM USNEOIDES Dodge, sp. nov.<br />
Type : Macquarie Island, Featherbed Flat, B.A.N.Z.A.R.E. B531-3.<br />
Thallus flaccidus, gelifactus, pauci-ramosus. usque ad8 5 cm. altitudine, iiiferne 1 mm.<br />
diametro, teres, subdichotome ramosus, ramis articulatis, basi subinflatis, ramulis 3 mm. longi-<br />
tudine, circiter 0- 1 hm. diametro, raris, pellucidus, albidus cum annulis olivaceis ubi adsunt algae ;<br />
cortex circiter 18p crassitudine, laxe fastigiatus, algae in pulvinulis annularibus, filamentis axi<br />
~hondroideo perpendicularibus, 45p longitudine, cellulis 8-lop diametro; medulla non bene<br />
evoluta; axis chondroidea circiter 75p diametro hyphis tenuibus, pachydermaticis, conglutinatis.<br />
Thallus flaccid, gelified, sparingly branched, up to 5 cm. tall, 1 mm. in diameter below, terete,<br />
branching subdichotomous, the branches articulate by an annular crack as 'far as the chondroid<br />
axis, slightly inflated above the joint, ramuli 3 mm. long about 0.1 mm. in diameter, rare, mostly<br />
in the upper portion, pellucid, white with ecru olive bands where algae are present; cortex about<br />
18p thick, a loose palisade formed from perpendicular branches of the corticating hyphae, cutting<br />
off conidium-like cells 4 X 1p at the surface of the gel, somewhat less compact over the portions<br />
lacking algae where it rests on the chondroid axis; algae in annular cushions along the thallus, the
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