LICHENS AND LICHEN. PARASITES

DODGE--LICHENS AND LICHEN PARASITES 136
wide, suggesting the petals of a flower (whence the name) impellucid when moist, verrucose
decorticate, subsquamulose near the base; cortex not developed algal layer 55-65p thick, in
discrete colonies, forming the verrucae which disintegrate into minute soredia, cells 7-8r. in
diameter; medulla scarcely differentiated except as loosely woven slender hyphae between the
algal cells; chondroid axis 100-110p thick, of moderately closely woven thick-walled hyphae.
Apothecia sessile in the margin of the cups, confluent in lines, immature, about 0-2 mm.
broad, disc very convex, parathecium not developed; hypothecium cuneate, 65p tall, of loosely
woven, subvertical, slightly brownish, thin-walled hyphae; thecium not sharply differentiated,
about 2 5 ~ tall; paraphyses\slender, dichotomous above, tips clavate, 2-3-celled, cutting off
spherical cells about 3p in diamxer; asci not yet developed. [In a crushed preparation of a
slightly more mature apothecium, there are a few thick-walled, cylindrical asci and a few free
ascospores, narrowly ellipsoidal, 7-8 X 3p. Spegnogcm$ not seen.]
The systematic position of this species is not clear. ?he dilation of the cup with its short,
thick stipe and the verrucae of the podetia are suggestive of C. pyxaata but its microscopic
characters are closer to C. fimbriata. It may be related to C. fzcscopyxklu.ta Hampe, Linnaea, 25,
712; 1852 (mom. nu&.) collected in Tasmania by Stuart, but I have not seen material of this
species.
Macquarie Island : Featherbed Flat, B.A.N.Z.A.R.E. B531-10 ; north end. B.A.N.Z.A.R.E.
B540-9. -
CLADQNIA JOHNS~ONI Dodge, sp. nov.
Type: Kerguelen, Long Island, Royal Sound, B.A.N.Z.A.R.E. B168-1.
Thallus primarius convexus, subadpressus, dein sinuatus, plus minusve laceratus, lobulis
subadscendentibus, 2-10 mm. diametro, circiter 18OP crassitudine, ad margines tenuescens, dein
evanescens, madidus pallide glaucus, siccus albidus ; cortex circiter 45p crassitudine, fastigiatus,
hyphis pachyderm@ticis, gelifactis; stratum algarum circiter 35p crassitudine, protococcoideym,
/'
continuum, cellulis caespitosis, pressione mutua polyhedricis, circiter 7-8p diametro ; medulla
hyphis pachydermaticis, plus minusve pericliiialibus, circiter 5~ diametro, dense contextis.
Podetia primo cylindrica, scyphifera, scyphis non dilatatis, clausis, concavis, margine laevi,
subbrunnea, dein superene sensim dilatata zorediosaque, pellucida, inferne areolato-corticata,
circiter 20 mm. altitudine, scyphis ad 12 mm. diametro, rare e marginibus aut lateribus prolifew
; coytex deest ; stratum algarum coloniis sphaericis, ab uno duobusve stratis hypharum tectie,
srx-?di~efformantibus;
t
axis chondroideus, 110-150p crassitudine, hyphis pachydermaticis, congiuti'natis,
dense contextis.
dpothecia immatura, circiter 2 mm. diametro, in marginibus scyphorum sessilia, convexissima ;
parathecium non evolutum ; hypothecium obcoiiicum, circiter 12OP altitudine, hyphis subverticalibus
radiantibusque, leptodermaticis, subbrunneis ; paraphyses apicibus late clavatae, cellulas
pachydermaticas, subsphaericas, circiter 4p diametro abjungentibus ; asci non evoluti.
Primary thallus of imbricate squamules, convex and somewhat appressed at first, then
sinuate and more or less lacerate, lobules somewhat ascendant, 2-10 mm. in diameter, about
180p thick, thinning somewhat towards the margins, finally disappearing as the podetia proliferate,
pale glaucous green when moist, becoming white when dry; cortex about 45r. thick,
fastigiate, of thick-walled hyphae which gelify almost completely; algal layer about 35p thick,
protococcoid, continuous, with cells densely packed so that they appear angular from mutual
pressure, about 7-8p in diameter; medulla of densely wovw more or less periclinal, thick-walled,
hyaline hyphae, about 5p in diameter.