LICHENS AND LICHEN. PARASITES

'
I
DODGE--LICHENS AND LIOHEN PARASITES 125
isidioideo-verrucosa subsquamulosave dein superne areolato-corticata et granuloso-sorediosa postea
denudata glaucescentia vel substraminea, lateribas marginum scyphorum 150p crassitndine ; cortex
deest ; axis chondroideus ad 90p crassitudine, hyphis longitudinaliter laxe contextis, gelifactis.
Apothecia pellucida, pallide flavida, circum marginem scyphorum confluentia, ad 0.25 mm.
diametro immarginata, disco plano, amphithecio mox evanescente ; parathecium non evolntum,
hypothecium cuneatum circiter 100p altitudine, hyphis leptodermaticis, subverticalibus, subbrunneis
; paraphyses tenues circiter 2r diametro, non ramosae, apicibus non incrassatis; asci clavati
circiter 30 X 6-7p leptc@ermatici; ascosporae hyalinae, longe ellipsoideae vel subfusiformes,
6-7 x 3r.
Primary thallus orbicular, 4-5 mm. in diametei, surface verrucose, or somewhat isidiose, margin
I
verrucose and somewhat lacerate, closely imbricate and concrescent, about 300p thick, light
brownish olive to glaucous above, sorediose, glaucous to whitish below; cortex fastigiate, soqn
wholly gelified, 25-35p thick, brownish olive ; algal layer about 90-110p thick, compact protococcoid,
cells about lop in diameter with some cells or small colonies in the medulla, forming the soredia on
the margin and the lower surface; medulla loosely woven, of thick-walled hyphae about 4p in
diameter.
Podetia about 3 cm. tall, 1-2 mm. in diameter, gradually dilated upward to 5-6 mm. wholly
scyphiferous, cups not dilated, sometimes a little smaller than the greatest diameter of the
podetium, margin entire or somewhat lacerate, but not proliferous in our material, densely isidioidverrucose
and subsquamulose below, then areolate corticate, passing into powdery, granular soredia
above, and finally nearly denuded of soredia, glancescent to substramineous ; walls about 130r thick
at the margin of the cup, cortex wholly lacking above, probably the same as that of the primary
thallus below ; algal layer reduced to small spherical soredia attached by the loosely woven medullary
hyphae, abqnt 4p in diameter, chondroid axis about 90p thick, of loosely &oven, anastomosing
longtiudina/l hyphae imbedded in a hyaline gel.
,
Apothecia pellucid, pale yellowish, confluent around the margin of the cup, about 0.25 mm. i11
diameter, immarginate, disc flat, edges convex; amphithecium early evanascent ; parathecium not
developed ; hypothecium cuneate, about 100r tall, of slender, thin-walled, vertical hyphae, slightly
brownish, not clearly differentiated from the baseof the thecium ; thecium about 35r tall ; paraphyses
spnder, about 2p in diameter, apparently unbranched, tips not thickened; asci clavate, about
$0 X6-7r, thin-walled; ascospores hyaline, long ellipsoid to subfusiform, 6-8 X 3r.
Macquarie Island, north end, Sta. 81, B.A.N.Z.A.R.E. B540-11.
CLADONIA RIOIDA (Tayl.) Hampe.
Cladonia &qida, Hampe, Liimaea, 28, 216; 1856 Nyl., C . R. Acad. Sci., 83, 88; 1876.
Cmyce rigida Taylor in Hook. f. & Taylor, London Jour. Bot., 3, 652 ; 1844.
Cenontyce pyxidata v. rigida Taylor in Hoolr f., Crypt. Antarct., 85 ; 1845.
Type : Lord Anckland'a group, J. D. Hooker, 1575 (Voy. " Erebus & Terror") in Taylor Herb.
at Farlow Herbarium, Harvard TJniversity.
[Primary thallus foliose, ascendent, ashy-glaucous, margin undulate, subincurved, thick,
broad.]
Podetia up to 1.5 cm. tall, and 1.5 mm. in diameter, growing in dense tufts, slightly inflated
4
in the middle, tips very minutely scyphiferons (scarcely more than truncate), cups about 0-4 mm.
in diameter with two or three proliferations from the margin, appearing dichotomously or trichotomsusly
branched in the older portions of the podetia, not perforate, below with dense, verrucose,
subisidioid squamules about 0.15 X 0.5 mm. passing into corticate verrucae above which break away,