— 6o — 
49. Usnea barbata var. florida st. rubescens Mull. Arg. 
“Terra do Picu. . . .prope Blumenau. ” Brazil. (Hedw. 30:223. 1891.) 
“toto ferrugineo-rubescens. ” l.c. 
Type in the Boissier Herbarium, Chambesy. 
50. Usnea plicata var. scabra Mull. Arg. 
“Supra Joinville,” province Catharina, Brazil. (Hedw. 30:225. 1891.) 
‘‘rami et ramuti minute et crebre verruculoso-asperi v. apice laevis, primarii 
hinc inde laevigati, tota olivaceo-fusca.” 1. c. 
Type in the Boissier Herbarium, Chambesy. 
51. Usnea dasypoga var. plicata f. sorediata Zahlbr. 
“Serra do Preto. ” Brazil. (Bull. Herb. Bois. 8: 467. 1908.-) 
“Thallus cinerascenti-viridescens, ramis primariis 1-1, 2mm. crassis, tereti- 
bus, crebre albo-annulatis, increbre dichotome vel sympodialiter divisus, ramis 
patentibus, fibrillis fere nullis, sorediosus, soredies primum punctiformibus, albi- 
dis, parum prominulis et plus minus confluentibus, demum fere semiglobosis, 
1— I, 4mm. latis, glaucescentibus et pulverulentis. Medulla KHO e flavo rubens, 
2- 3 laditudinio thalli occupans. Apothecia non visa.” 1 . c. 
In the K. K. Naturhistorisches Museum, Vienna. 
52. Usnea plicata var. sorediosa Mull. Arg. 
“Patagonia.” (Hedw. 34 ; 139. 1895.) 
“abbreviata, ramis et ramillis laevibus his superne sorediosis. ” l.c. 
Type in the Boissier Herbarium, Chambesy. 
53. Usnea arthroclada var. spinulosa Miill. Arg. 
“prope Joinville,” Brazil. (Hedw. 30 : 225. 1891.) 
“rigidula, tota cinereo-v. fere caesio-pruinosa, rami laeves, ramille sparse 
tuberculoso-asperi et spinuligeri, — Rami crassiores tantum hinc inde crebre 
articulati.” 1. c. 
On rocks. 
Type in the Boissier Herbarium, Chambesy. 
54. Usnea Steiner i Zahlbr. 
“St. Anna prope Lapa,” “Prov. Sao Paulo.” (Denksch. math, naturw. 
Klasse kaiserl. Akad. Wissen. 83 ; 186. 1909.) 
. “Thallus erectus, usque 5 cm altus, fruticulosus, dichotome vel subdichotome 
ramosus, pallide carneo-lutescens, opacus, molliusculus, ramis primariis 1-1.15 
mm crassis, teretibus, non articulatis nec transversim fissis, scabridis, dense 
verrucalis acutiusculis, minutis obsitis, sorediis destitutis, ramillis simplicibus vel 
plus minus ramosis, 3-5WW longis, laevibus patentibus rectiusculis, non spinuli- 
formibus sat dense munitis; cortice chondroideo, 90-125^ crasso, decolore, sim- 
plici, ex hyphis ramosis formato, retiformi KHO leviter lutescente; strato myelo- 
hyphico laxissimo, fere cavernoso, albo, KHO non vel haud reagente J lutes- 
cente; gonidiis pleurococcoideis, globosis, 9-12 n latis; axis chondroideo tenui, 
1-5 latitudinis thalli ramorum primariorum attingente, ex hyphis longitudinaliter 
dense contextis formato, solido. Apothecia terminalia, minora, 6-8 mm lata, 
thallo concoloria, scutellata, excipulo subtus inaequali-subverruculoso vel fere 
sublaevigato, opaco, ad marginem spinulis simplicibus vel ramulosis usque 
14 mm longis, erectis vel suberectis sat dense obsito: disco pruinoso, lutescenti- 
glaucescente, opaco, KHO leviter lutescente; epithecio crassiusculo, usque 9/1 
alto, amorpho, KHO demum dissoluto, J rufescenti-lutescente; hymenio decolore, 
60-6 5 At alto, J e coeruleo demum fulvescenti-obscurato; paraphysibus simplicibus, 
