— 5 8 — 
39 * Usnea melaxantha Ach. 
“Americae australis. ” (Meth. Lich. 2 : 307. 1803.) 
“thallo subcrustaceo fruticuloso erecto tereti scabro sordide aurantiaco, 
ramis divaricatis ramulosis apice simplicibus nigris; orbillis nigris subtus thallo 
concoloribus reticulato-scabridis, margine tenui flavicante nudo integro.” 1. c. 
= Usnea sulphur ea (Zoega) Th. Fr. 
Type in the Acharian Herbarium, Helsingfors. 
40. Usnea meridionalis Zahlbr. 
“ Neu-Wurttemburg, prope Elsenau,” “ Prov. Rio Grande do Sul.” (Denk- 
sch. math, naturw. Klasse kaiserl. Akad. Wissen, 83 : 187. 1914.) 
“Thallus erectus, gompho dilatato substrato affixus, fruticulosus, erectus 
3-6 cm altus, viridescenti-glaucescens, opacus, molliusculus, dichotome vel sym- 
podialiter ramosus, ramis primariis usque 2mm crassis, subfusiformibus, in parte 
inferiore imprimis increbre articulatis, ad fissurum leviter constrictis, in superfice 
papillis minutis, parum elongatis dense obsitis, KHO haud lutescentibus, ramis 
omnibus fibrillis patentibus, laevigatis, acutis, rectiusculis vel parum cuvatis, 
utplurimum simplicibus, usque 5 mm longis sat dense obsitis; cortice fragili, chon- 
droideo, decolore, subduplici, in parte exteriore ex hyphis pachydermaticis, 
versus marginem plus minus perpendicularibus, caeterum retiformibus formato, 
in parte inferiore additis hyphis nonullis axi parellelibus, 90-140^ crasso, gonidiis 
glomeratus, pleurococcoideis, cellulis globosis, 8-9^ latis; strato myelohyphico 
valde laxo, fere cavernoso, albo, KHO-, J lutescente, ex hyphis 2. 6-3. 5^ crassis, 
leptodermaticis,- increbre septatis formata; axi chondroideo pi latitudinis thalli 
occupante, ex hyphis longitudinalibus, dense contextis composito, J lutescente. 
Apothecia terminalia, sat parva, 3-6 mm lata, modice scutellata, excipulo 
thallo concolore, subruguloso-inaequali, ad superficiem et ad marginem fibrillis 
subsimplicibus, filiformi-acutatis, 2-$mm longis munito; disco albido-glauces- 
cente, pruinoso, KHO leviter fulvescente; epithecio crassiusculo, pulverulento, 
sordido; hymenio decolore, 65-80 n alto, J e coeruleo demum obscurato; para- 
physibus simplicibus, eseptalis; ascis oblongo-clavatis, hymenio subequilongis, 
ad apicem rotundatis, 8 sporis; sporis in ascis subbiseri-alibus, decoloribus, 
simplicibus, late ovalibus vel late ellipsoideis, 9-10/x longis et 7.5-8 11 latis, mem- 
brana sat tenui cinctis.” 1. c. 
In the K. K. Naturhistorisches Hofmuseum, Vienna. 
41. Usnea miliaria Tayl. 
“Arica. ” Chile. (Hook Lond. Jour. Bot. 6: 192. 1847.) 
“thallo caespitoso, erectiusculo, cinereo, tereti, ramosissimus: gemmis 
granulatis, confertissimis; ramis ultimis acuminatis, subglabris; apotheciis ses- 
silibus, concoloribus, pruinosis, demum planis, extus scabris, margine nudo, 
demum crenulato.” 1. c. 
= Parmelia coralloides v. aspera Eschw. fide Mull. Arg. 
42. Usnea sulphur ea var. normalis Wain. 
“Detroit de Gerlache:” “l’lle Auguste, ” 64° 2' de latitude sud. “ 1 ’ lie Brabant, 
64° 91' de latitude sud. ” “ Cap Anna Osterrieth, 64° 33' de latitude sud. ” “ Cap 
Renard, 65° i'de latitude sud.” (Result. Voy. S. Y. Belgica, Bot. 6: 11. 1893.) 
“Thallus partim crebre verruculosus papillosusque, esorediatus. Stratum 
myelohyphicum crebrum, KHO non reagens. Axis chondroideus jodo leviter 
caerulescens. Apothecia ciliis nullis instructa. Est forma typica hujus speciei. 
Rami steriles saepe partim articulatum nigricanti — et flavido-variegati, partim 
apice solo nigricantes.” 
