31 



LICHENES ANTILLAUUM A W. R. ELLIOTT COLLECTLt 



ExpoNiT Edv. a. Wainio. 



Annis 1891 et 1892 eel. W. R. Elliott etiam lichenes in insulis 

 Dominicre et Sti. Vincenti collegit. Htec collectio, 154 species 

 complectens, quarum 50 sunt nov;T3, hie exponitur. 



I. DISCOLICHENES. 



A. Cyclocarpe^. 



Trib. 1. Parmelie^. 



1. Usnea. 



1. U. BARBATA (L.) Acli. * U. floviila (L.) Wain. Etud. Bros. i. 3. 



Var. coMosA (Acli.) Wain. I.e. In Girondelle (2000 ped.) in 

 Dominica et in St. Andrews (2500 ped.) in St. Vincent. 



Var. PERPLEXANS Wain. /. c. 5. In St. Andrews (2500 ped.) in 

 St. Vincent. 



Var. XANTHOPOGA (Nyl.) Wain. Tliallus erectus aut suberectus, 

 Itevigatus ant in eodem specimine interdum passim cartilagineo- 

 verruculosus, Sfepe apicem versus leviter sorediosus, brevis aut 

 longitudine mediocris (circ. 12-70 millim.), rigidiusculus, flavescenti- 

 stramineus. Stratum myelohyphicum crebre aut sat crebre con- 

 textum, KHO lutescens, I non reagens. U. xonthopoga Nyl, Lich. 

 Campb. (1876) 2. IJ. harhata v. xantliopoga Miill. Arg. Lich. Beitr. 

 (1889), n. 1470 pr. p. — F. suhhlrta Wain. Thallus brevis (12-40 

 millim.), apicem versus creberrime ramosus, pro parte demum 

 ramis adventitiis aut passim etiam ramis soredialibus (spinula^- 

 formibus) plus minus instructus aut iis destitutus, strato myelo- 

 hyphico crebro. Thallo pro parte Ifevigato et minus spinuloso a 

 var. hirta (Hofl'm.) Fr. differt. Ad parietem ligneum in Girondelle 

 (2000 ped.) in Dominica (n. 495). — F. inolliusciiht Wain. Thallus 

 brevis aut longitudine mediocris (40-70 millim.), apicem versus 

 parcius ramosus, ramis adventitiis et soredialibus destitutus, strato 

 myelohyphico sat crebre contexto. A var. moUi Wain. Etud. Bres. 

 i. 4, thallo pro parte ln3vigato, apicem versus soredioso et strato 

 myelohyphico crebrius contexto differt. Ad corticem arboris in 

 monte St. Andrews (2500 ped.) in St. Vincent (n. 16«). 



2. Ramalina. 

 1. R. GRACILIS (Pers.) Nyl. *A'. Antillaruui Wain. Thallo 

 breviore, magis stramineo, apicibus flagelliformibus brevioribus aut 

 vix flagellato-attenuatis et apotheciis minus pruinosis a 7i'. f/racili 

 (Wain. Etud. Bres. i. 17) differt. Thallus circ. 10-80 millim.' altus, 

 erectus, angulato-teretiusculus, fruticuloso-ramosus, sensim attenu- 

 atus, ramis primariis 0-3-1 millim. crassis, longitudinaliter parallele 

 canaliculato-striatus, esorediatus, stramineus aut apicibus passim 

 paululum nigricantibus, medulla stuppea, KHO non reagente, ramis 

 patentibus. Apothecia parva aut sat parva, 1-2*5 millim. lata, 



t Mr. Elliott made this collection on behalf of the West India Natural History 

 Exploration Committee. 



