— Pachynae — 
Chondroid axis pi diameter of the thalline filament 
Branches terete 
Thallus intricate 
Erect 
Flavous 
Fibrillose 19. var. fastuosa 
Efibrillose 57. var. subcorunta 
Cinereus 
KHO + 16. densirostra 
KHO— 
Fibrils concolorous 30. Hieronymi 
Fibrils black-tipped 1. adusta 
Prostrate 
Exciple smooth. 12. concinna 
Exciple papillate 47. radiata 
Pendulous 28. gracilis 
Branches angulate 44. var. paradoxa 
Uncertain species: 2. U. barbata var. amblyoclada; 13. concreta; 23. strigosella 
var. furfurosula. 
1. Usnea Hieronymi var. adusta Kremphl. 
“Argentina.” (Flora 61 : 436. 1878.) 
“Fibrilli versus apices plus minus nigricantes, quasi adusti, caetera ut in 
typo.” 1. c. 
2. Usnea barbata var. amblyoclada Mull. Arg. (Flora 72 : 509. 1889.) 
‘‘Serra Ventana.” Argentina. 
“thallus et ramificatio et color virescenti-flavicans ut in var. praecedente, 
sed tota humilior, ramilli minus copiose v. evanescentes et rami ramulique soredi- 
oso-pulverulenti, quasi pulveraceo-incrassati et obtusi facti, saepius variet in- 
curvi.” 1. c. 
Type in the Boissier Herbarium, Chambesy. 
3. Usnea melaxantha Ach. var. angulosa Miill. Arg. 
“Patagonia.” (Flora 71 : 528. 1888.) 
“thallo robusta, parce ramosa, apothecia ciliata dorso et rami et podetia 
tota longitudine v. saltern longo tractu valide alveolatim plicato-angulosa. — 
Discus fuscus, v. cinerascenti-fuscus, at turn decoloratus tantum, in epithecio 
enim pigmentum nigrum hinc inde copiose occurrit et ramilli caeterum adsunt 
immixti bene cum var. sphacelata Montg. hujus speciei congruentes.” 1 . c. 
Type in the Boissier Herbarium, Chambesy. 
= U. dasypogoides var. angulosa M fill. Arg. 
4. Neuropogon [Usnea] antennarius Nees & Flot. 
“Andes Antucenses, Chile.” 1829. (Linnaea 9 : 497-498. 1834.) 
“thallo stricto erecto polito teretiusculo ramoso-fastigiato ochroleuco, 
ramis setaceis nigricantibus pallide-annulatis, apotheciis podicellatis concavis, 
disco castaneo-nigro nitido, margine 1. subtus ciliato-doryphorove.” 1. c. 
= Usnea antennarius (Nees & Flot.) Mass. 
