104 The Scottish Naturalist. 



3. Usnca dascea sp. nov. — Similis U hirta sed robustior et 



rigidior et sorediis parvis albidis vix prominulis creberriter 

 adspersa; axis centralis pergracilis. 



Madeira (J. Payne). 



4. Usnea lurido-rufa sp. nov. — Similis U Jiirttz sed thallo ob- 



scuriore, sordide vel saepius lurido-rufo ; apothecia mediocria 

 breviter fibrilloso-ciliata reque ac infra, pallide glaucescentia 

 vel pallida; sporas soepe parviores, .006-.008 x .005-. 0065 

 mm. 



In Himalaya (Coll. Hook, and Thomson, No. 17 16). 



5. Usnea undulata sp. nov. — Similis U. hirtce sed robusta, thallo 



elongato undulato, ramoso (ramis s?epe uncinatis), pendulo 

 (longit. fere pedalis). 



In Africa Australi (D re J. Shaw). 

 The external thallus K — C — . 



6. Usnea distehsa sp. nov. — Similis U. dasypogce sed robusta 



elongata, pendula (pedalis et ultra). 



In Africa Australi (D re J. Shaw). 



Rather more branched than in U. dasypoga, but the branch- 

 ing is for the most part from near the common stock. Thallus 

 sordidly flavescent. Also an intermediate form from N. Z., where 

 the elongated stems are prostrate (Mr J. Buchanan). 



7. Usnea filipendula sp. nov. — Similis U. dasypoga sed thallo 



gracili elongato et pendulo aeque ac minute et crebre 

 papilloso - aspero ; fibrillar medullares K fl. dein rufo - 

 aurantiacae, deraura rubentes. 



In America bor. (Mrs Roy). 



8. Usnea sirtisordida (Strn.) — Similis U. eeratines, erecta rigida, 



thallo ssepissime obscuriore (cervino) et apotheciis pallidis 

 vel pallide glaucescentibus ; sporos .0T-.014 x .007-.0095 

 mm. 



In Himalaya (J. Thomson), Neilgherries (Dr G. Watt). 



I find the reactions of Ncuropogon melaxanthus (Ach.) from N. Z. 

 — viz., fibrillse medullares K fl. dein rubentes; I — 



