14 



USNEA FASCIATA 



Cryptogamia Lichenes. Nat. Ord. Lichenes. 



Gen. Char. ApotJiecia orbiculata, terminalia, peltata, a thallo for- 



mata ejusque substantia cortical! similari undique obtecta, am- 

 bitu immarginato, plerumqiie ciliato. Thallus subcrustaceus te- 

 retiusculus ramosus substantia elastica filiformi hyalina central! 

 percussus.— ^c^. - 



i r 



XJsnea Jasci at a ; ramosissima tuberculato-scabra flavo-virescens^ ramis 



repetitim dichotomis proliferis saepissime nigro-fasciatis ultimis 

 lateralibusque nuraerosissimis capillaceo-attenuatis, apotheciis be- 

 mispbaericis nudis brunneis extus tuberculatis. (Tab. XL) 



Usnea fasciata. Torrey in Silliman^s American Journ. of Sc. v. 6. cian 



ic. [ahsq. apotheciis,) ^ 



m 



i 



Hab, In rupibus antarctici? Novae Zetlandiae meridlonalis. — In Nova 



Hollandia, locis alpinis ? 



■m 



Thallus caespitosus, erectus, 3 — ^-uncialis, erectus, ramosissimus, flavo- 

 virescens, ramis repetitim dichotomis magis minus ve tuberculoso- 

 scabridis atque proliferis, ramulis minutis gracilibus simplicibiis 

 filiformi-attenuatis vel ramosis subhorizontalibus, e latere egredi- 



■ 



entibus, ramis ultimis sgepe nigro-fasciatis attenuatis. ApotJiecia • 

 terminalia peltata, primum parva, globosa, demum hemisphaerica, 

 semiunciara diametro, intus fusca, extus e thallo formata, minute 

 tuberculata* 



A 



W. Edwards^ Esq., who accompanied in a medical capacity 

 the first and second expeditions sent to discover a north-west 

 passage, was so obliging us to procure the fine specimen here 

 represented of the antarctic Usnea, on which some observa- 

 lions will be offered under the following species. 



Fig. 1. Plant {nat. size). Fig. % Portion: — magnified. 



